Green Building Construction - Module 6 - Green Audit and Green Retrofitting
rohandasgupta
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Oct 16, 2024
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About This Presentation
In this presentation, the following topics are discussed:
1. Green audit: pre-audit, on-site audit and post-audit report
2. Case study of any one green building audit
3. Green retrofit – overview, components of green retrofit:
integrated design, occupant behaviour, lighting retrofits, HVAC
retrofi...
Slide Content
DLOC-4
GREEN BUILDING
CONSTRUCTIONS
Module No. 6
Green Audit & Green Retrofitting
-Dr. Rohan Dasgupta
GREEN BUILDING
CONSTRUCTIONS
Module No. 6
Green Audit & Green Retrofitting
-Dr. Rohan Dasgupta
Green Audit - Introduction
●An official examination of the effects a building has on the environment
●Also called as environmental audit
●Ensures how well organizations, management and equipments are functioning to protect the
environment
● Conducted by a team of experts or auditors from green rating organisations
●Essential part of green building certification of new buildings
●Also done for green retrofitting of existing buildings
2
●An official examination of the effects a building has on the environment
●Also called as environmental audit
●Ensures how well organizations, management and equipments are functioning to protect the
environment
● Conducted by a team of experts or auditors from green rating organisations
●Essential part of green building certification of new buildings
●Also done for green retrofitting of existing buildings
2
Green Audit - Stages
●Pre-audit
●On-site audit
●Post audit
3
●Pre-audit
●On-site audit
●Post audit
3
Pre-audit
●It is the initial phase where the groundwork is laid for the audit process
●This stage involves planning, preparing, and setting clear objectives to ensure a successful
and comprehensive assessment of an organization’s environmental practices
●It is crucial for defining the scope and boundaries of the audit, organizing resources, and
establishing a clear framework for data collection.
4
●It is the initial phase where the groundwork is laid for the audit process
●This stage involves planning, preparing, and setting clear objectives to ensure a successful
and comprehensive assessment of an organization’s environmental practices
●It is crucial for defining the scope and boundaries of the audit, organizing resources, and
establishing a clear framework for data collection.
4
Key Activities of Pre-audit
●Setting Objectives: The goals and purpose of the green audit are determined, such as green
retrofitting of existing buildings, NAAC accreditation of educational institute etc.
●Forming an Audit Team: An internal or external audit team is assembled, comprising
environmental experts (like IGBC AP) and key stakeholders from the organization.
●Defining the Scope: The areas to be audited are outlined, including energy usage, water
management, waste disposal, and environmental policies. The scope may cover the entire
organization or specific departments or processes.
●Gathering Background Information: Relevant data, such as past environmental reports, utility
bills, and resource usage records, is collected to provide a baseline for the audit.
5
●Setting Objectives: The goals and purpose of the green audit are determined, such as green
retrofitting of existing buildings, NAAC accreditation of educational institute etc.
●Forming an Audit Team: An internal or external audit team is assembled, comprising
environmental experts (like IGBC AP) and key stakeholders from the organization.
●Defining the Scope: The areas to be audited are outlined, including energy usage, water
management, waste disposal, and environmental policies. The scope may cover the entire
organization or specific departments or processes.
●Gathering Background Information: Relevant data, such as past environmental reports, utility
bills, and resource usage records, is collected to provide a baseline for the audit.
5
Key Activities of Pre-audit
●Planning Site Visits: Scheduling site inspections and interviews with staff members to
observe current practices and identify potential environmental risks.
●Raising Awareness: Employees and stakeholders are informed about the audit’s objectives,
and their cooperation is sought to ensure transparency and accurate data collection.
●Preparing Documents: Documents are prepared either in MS-Excel and print-outs are taken or
Google Sheets are created for digital updation of audit results during on-site audit.
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●Planning Site Visits: Scheduling site inspections and interviews with staff members to
observe current practices and identify potential environmental risks.
●Raising Awareness: Employees and stakeholders are informed about the audit’s objectives,
and their cooperation is sought to ensure transparency and accurate data collection.
●Preparing Documents: Documents are prepared either in MS-Excel and print-outs are taken or
Google Sheets are created for digital updation of audit results during on-site audit.
6
On-site Audit
●This is the phase of green audit where the audit team visits the organization or facility to
observe and evaluate its environmental practices in real time
●This stage involves collecting data, inspecting operations, and interacting with staff to assess
how resources such as energy, water, and materials are being used and how waste is being
managed
●In this stage, evidences or proofs of the same are collected in the form of relevant
photographs, documents etc.
7
●This is the phase of green audit where the audit team visits the organization or facility to
observe and evaluate its environmental practices in real time
●This stage involves collecting data, inspecting operations, and interacting with staff to assess
how resources such as energy, water, and materials are being used and how waste is being
managed
●In this stage, evidences or proofs of the same are collected in the form of relevant
photographs, documents etc.
7
Key Activities of On-site Audit
●Site Inspection: The audit team conducts a physical walkthrough of the facility to observe
equipment, processes, and infrastructure related to energy, water, and waste management. They also
check for any environmental hazards or inefficiencies.
●Data Collection: Detailed measurements and data are gathered on resource consumption (e.g.,
energy meters, water usage), waste generation, and environmental impact factors like emissions,
noise, and pollution. Photographs (preferably geotagged) are clicked as proof of various facilities, as
mentioned above.
●Staff Interviews: The audit team interviews key personnel to understand their roles in managing
environmental resources and to gain insights into existing practices and challenges.
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●Site Inspection: The audit team conducts a physical walkthrough of the facility to observe
equipment, processes, and infrastructure related to energy, water, and waste management. They also
check for any environmental hazards or inefficiencies.
●Data Collection: Detailed measurements and data are gathered on resource consumption (e.g.,
energy meters, water usage), waste generation, and environmental impact factors like emissions,
noise, and pollution. Photographs (preferably geotagged) are clicked as proof of various facilities, as
mentioned above.
●Staff Interviews: The audit team interviews key personnel to understand their roles in managing
environmental resources and to gain insights into existing practices and challenges.
8
Key Activities of On-site Audit
●Documentation Review: Relevant documentation such as energy bills, maintenance logs,
waste disposal records, and environmental policies are examined to verify compliance and
evaluate performance against set benchmarks.
●Identifying Improvement Areas: During the audit, areas where resources are being wasted or
where more sustainable practices can be implemented are noted. This includes inefficient
energy use, water leaks, poor waste management, or lack of recycling practices.
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●Documentation Review: Relevant documentation such as energy bills, maintenance logs,
waste disposal records, and environmental policies are examined to verify compliance and
evaluate performance against set benchmarks.
●Identifying Improvement Areas: During the audit, areas where resources are being wasted or
where more sustainable practices can be implemented are noted. This includes inefficient
energy use, water leaks, poor waste management, or lack of recycling practices.
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Post Audit
●This is the final phase of green audit where the findings from the audit are analyzed,
documented, and presented
●It focuses on reviewing the data collected during the on-site audit, preparing a detailed report,
and suggesting actionable recommendations for improving the organization’s environmental
performance.
●The stage plays a critical role in ensuring the organization can implement sustainable
practices based on the audit's results.
10
●This is the final phase of green audit where the findings from the audit are analyzed,
documented, and presented
●It focuses on reviewing the data collected during the on-site audit, preparing a detailed report,
and suggesting actionable recommendations for improving the organization’s environmental
performance.
●The stage plays a critical role in ensuring the organization can implement sustainable
practices based on the audit's results.
10
Key Activities of Post Audit
●Data Analysis: The audit team reviews and interprets the data gathered during the on-site
audit, identifying trends, inefficiencies, and areas for environmental improvement.
●Report Preparation: A comprehensive audit report is prepared, summarizing the findings,
outlining the current environmental practices, and providing specific recommendations to
enhance sustainability. The report often includes action plans, timelines, and resource-saving
projections.
●Presentation of Findings: The audit team presents the report to the organization’s
management and stakeholders, discussing key areas of concern and opportunities for
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●Data Analysis: The audit team reviews and interprets the data gathered during the on-site
audit, identifying trends, inefficiencies, and areas for environmental improvement.
●Report Preparation: A comprehensive audit report is prepared, summarizing the findings,
outlining the current environmental practices, and providing specific recommendations to
enhance sustainability. The report often includes action plans, timelines, and resource-saving
projections.
●Presentation of Findings: The audit team presents the report to the organization’s
management and stakeholders, discussing key areas of concern and opportunities for
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Key Activities of Post Audit
improvement. This step also includes explaining how implementing recommendations can
lead to cost savings and better environmental outcomes.
●Action Plan Development: Based on the report, the organization develops an action plan to
address the identified issues, prioritize recommendations, and establish timelines for
implementation. This maybe in the form of green retrofitting.
●Monitoring and Follow-up: A plan is put in place to monitor progress and ensure that the
recommended changes are effectively implemented, with periodic reviews or re-audits
scheduled to assess improvement over time.
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improvement. This step also includes explaining how implementing recommendations can
lead to cost savings and better environmental outcomes.
●Action Plan Development: Based on the report, the organization develops an action plan to
address the identified issues, prioritize recommendations, and establish timelines for
implementation. This maybe in the form of green retrofitting.
●Monitoring and Follow-up: A plan is put in place to monitor progress and ensure that the
recommended changes are effectively implemented, with periodic reviews or re-audits
scheduled to assess improvement over time.
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Case Study of Green Audit
●Site: R. J. Sankara Eye Hospital
●Address: Plot no 12, Sector 5A, Sector 6, New Panvel East, Panvel, Navi Mumbai,
Maharashtra 410206
●Audited by: Mr. MAYUR CHAUDHARI (17CE15), Mr. KARTHIKAYAN NADAR (18CE29), Mr.
ARMAN KHAN (18CE07) and Mr. SADAAN MOHD ANSARI
●Guided by: Dr. ROHAN DASGUPTA
●Reference: IGBC Guidelines for Green Healthcare Facilities
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●Site: R. J. Sankara Eye Hospital
●Address: Plot no 12, Sector 5A, Sector 6, New Panvel East, Panvel, Navi Mumbai,
Maharashtra 410206
●Audited by: Mr. MAYUR CHAUDHARI (17CE15), Mr. KARTHIKAYAN NADAR (18CE29), Mr.
ARMAN KHAN (18CE07) and Mr. SADAAN MOHD ANSARI
●Guided by: Dr. ROHAN DASGUPTA
●Reference: IGBC Guidelines for Green Healthcare Facilities
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Case Study of Green Audit
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●Sample result:
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●Sample result:
Case Study of Green Audit
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●Summary of results:
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●Summary of results:
Green Retrofitting - Overview
●Green Retrofitting refers to the process of upgrading existing buildings or infrastructure to
improve their environmental performance and sustainability.
●This involves making modifications to reduce energy consumption, conserve water, minimize
waste, and enhance indoor environmental quality.
●The goal of green retrofitting is to transform older structures into eco-friendly, energy-efficient
spaces without the need for complete demolition or reconstruction.
●It depends on the recommendations made in the green audit conducted by a competent third
party.
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●Green Retrofitting refers to the process of upgrading existing buildings or infrastructure to
improve their environmental performance and sustainability.
●This involves making modifications to reduce energy consumption, conserve water, minimize
waste, and enhance indoor environmental quality.
●The goal of green retrofitting is to transform older structures into eco-friendly, energy-efficient
spaces without the need for complete demolition or reconstruction.
●It depends on the recommendations made in the green audit conducted by a competent third
party.
16
Components of Green Retrofitting
●Energy Efficiency: Retrofitting focuses on improving insulation, upgrading to energy-efficient
windows, installing LED lighting, and optimizing heating, ventilation, and air conditioning
(HVAC) systems. Renewable energy sources like solar panels can also be incorporated.
●Water Conservation: Installing water-saving fixtures such as low-flow faucets, dual-flush
toilets, and rainwater harvesting systems reduces water usage and promotes efficient water
management.
●Sustainable Materials: Using eco-friendly, non-toxic, and recycled materials for retrofitting
ensures lower environmental impact while improving indoor air quality.
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●Energy Efficiency: Retrofitting focuses on improving insulation, upgrading to energy-efficient
windows, installing LED lighting, and optimizing heating, ventilation, and air conditioning
(HVAC) systems. Renewable energy sources like solar panels can also be incorporated.
●Water Conservation: Installing water-saving fixtures such as low-flow faucets, dual-flush
toilets, and rainwater harvesting systems reduces water usage and promotes efficient water
management.
●Sustainable Materials: Using eco-friendly, non-toxic, and recycled materials for retrofitting
ensures lower environmental impact while improving indoor air quality.
17
Components of Green Retrofitting
●Waste Reduction: Green retrofitting encourages reducing construction waste through
recycling and reusing building materials, minimizing the ecological footprint of the renovation
process.
●Improved Indoor Air Quality: Enhancing ventilation, using low-emission materials, and
controlling moisture levels contribute to healthier indoor environments.
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●Waste Reduction: Green retrofitting encourages reducing construction waste through
recycling and reusing building materials, minimizing the ecological footprint of the renovation
process.
●Improved Indoor Air Quality: Enhancing ventilation, using low-emission materials, and
controlling moisture levels contribute to healthier indoor environments.
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Benefits of Green Retrofitting
●Lower operating costs: Through energy and water savings.
●Reduced carbon footprint: Less reliance on non-renewable energy sources and minimized
waste.
●Improved building lifespan: Enhances the durability and resilience of existing structures.
●Increased property value: Eco-friendly buildings are often more attractive to buyers and
tenants.
●Green certification: Enjoy the benefits provided by the government in terms of tax exemptions
etc. that are given to green buildings.
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●Lower operating costs: Through energy and water savings.
●Reduced carbon footprint: Less reliance on non-renewable energy sources and minimized
waste.
●Improved building lifespan: Enhances the durability and resilience of existing structures.
●Increased property value: Eco-friendly buildings are often more attractive to buyers and
tenants.
●Green certification: Enjoy the benefits provided by the government in terms of tax exemptions
etc. that are given to green buildings.
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Integrated Design of Green Retrofitting
●It is a collaborative approach where all key stakeholders—architects, engineers, contractors,
building owners, and sustainability experts—work together from the early stages of a retrofit
project to ensure that environmental, economic, and functional goals are achieved.
●Unlike traditional design processes, where different disciplines work in isolation, integrated
design focuses on holistic, cross-disciplinary collaboration to maximize sustainability
outcomes.
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●It is a collaborative approach where all key stakeholders—architects, engineers, contractors,
building owners, and sustainability experts—work together from the early stages of a retrofit
project to ensure that environmental, economic, and functional goals are achieved.
●Unlike traditional design processes, where different disciplines work in isolation, integrated
design focuses on holistic, cross-disciplinary collaboration to maximize sustainability
outcomes.
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Key Aspects of Integrated Design of Green Retrofitting
1.Collaborative Planning: All team members contribute their expertise from the start, ensuring
that sustainability goals are incorporated into every aspect of the retrofit, from energy
systems to materials and building performance.
2.Holistic Solutions: The approach considers the interrelationships between building
systems—such as energy, water, materials, and indoor air quality—leading to more efficient
and innovative solutions.
3.Early-Stage Decision Making: Critical decisions regarding energy use, materials, and
sustainability practices are made early, minimizing costly changes later in the project and
ensuring that the retrofit meets green standards.
4.Lifecycle Thinking: Integrated design emphasizes long-term sustainability, focusing on the
entire lifecycle of the building, including energy consumption, maintenance, and operational
efficiency.
In green retrofitting, integrated design enables a more efficient, effective, and sustainable
transformation of existing buildings, ensuring that all goals are aligned and resources optimized.
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1.Collaborative Planning: All team members contribute their expertise from the start, ensuring
that sustainability goals are incorporated into every aspect of the retrofit, from energy
systems to materials and building performance.
2.Holistic Solutions: The approach considers the interrelationships between building
systems—such as energy, water, materials, and indoor air quality—leading to more efficient
and innovative solutions.
3.Early-Stage Decision Making: Critical decisions regarding energy use, materials, and
sustainability practices are made early, minimizing costly changes later in the project and
ensuring that the retrofit meets green standards.
4.Lifecycle Thinking: Integrated design emphasizes long-term sustainability, focusing on the
entire lifecycle of the building, including energy consumption, maintenance, and operational
efficiency.
In green retrofitting, integrated design enables a more efficient, effective, and sustainable
transformation of existing buildings, ensuring that all goals are aligned and resources optimized.
21
Occupant Behaviour for Green Retrofitting
●Occupant behavior is a key factor that influences the success of green retrofitting projects,
which aim to enhance the sustainability and energy efficiency of existing buildings.
●Green retrofitting typically involves upgrading components like insulation, windows, heating,
ventilation, and air conditioning (HVAC) systems, and incorporating renewable energy
sources.
●While these improvements are designed to reduce energy consumption and carbon
emissions, their effectiveness heavily depends on how building occupants interact with the
retrofitted environment.
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●Occupant behavior is a key factor that influences the success of green retrofitting projects,
which aim to enhance the sustainability and energy efficiency of existing buildings.
●Green retrofitting typically involves upgrading components like insulation, windows, heating,
ventilation, and air conditioning (HVAC) systems, and incorporating renewable energy
sources.
●While these improvements are designed to reduce energy consumption and carbon
emissions, their effectiveness heavily depends on how building occupants interact with the
retrofitted environment.
22
Occupant Behaviour for Green Retrofitting
●Even with energy-efficient systems in place, poor occupant behavior can lead to energy
inefficiencies.
●For instance, heating or cooling systems may be optimized for energy savings, but if
occupants frequently adjust thermostats to extreme temperatures, keep doors or windows
open, or leave lights and appliances running unnecessarily, the benefits of the retrofits can be
undermined.
●Studies show that occupant behavior can account for as much as 30-40% of a building’s
energy consumption, emphasizing the importance of human interaction in green building
performance.
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●Even with energy-efficient systems in place, poor occupant behavior can lead to energy
inefficiencies.
●For instance, heating or cooling systems may be optimized for energy savings, but if
occupants frequently adjust thermostats to extreme temperatures, keep doors or windows
open, or leave lights and appliances running unnecessarily, the benefits of the retrofits can be
undermined.
●Studies show that occupant behavior can account for as much as 30-40% of a building’s
energy consumption, emphasizing the importance of human interaction in green building
performance.
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Occupant Behaviour for Green Retrofitting
●To fully leverage the potential of green retrofitting, educating occupants about energy-saving
practices is critical.
●This includes simple actions like properly using thermostats, turning off lights when not in
use, minimizing the use of energy-intensive appliances, and making use of natural ventilation
when appropriate.
●Behavioral changes such as these can complement the technological upgrades, ensuring that
the building operates at its highest efficiency.
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●To fully leverage the potential of green retrofitting, educating occupants about energy-saving
practices is critical.
●This includes simple actions like properly using thermostats, turning off lights when not in
use, minimizing the use of energy-intensive appliances, and making use of natural ventilation
when appropriate.
●Behavioral changes such as these can complement the technological upgrades, ensuring that
the building operates at its highest efficiency.
24
Occupant Behaviour for Green Retrofitting
●Moreover, advancements in smart building technologies—like automated lighting, smart
thermostats, and energy management systems—can assist in reducing the impact of
inefficient occupant behavior by providing feedback and automatic adjustments.
●However, occupants still need to be aware of how their actions affect energy usage to avoid
bypassing or ignoring these systems.
●While green retrofitting enhances a building's sustainability through physical upgrades, its true
impact is closely tied to the behavior of its occupants.
●Promoting energy-conscious habits, alongside technological retrofits, is essential to achieving
the desired environmental and economic benefits.
25
●Moreover, advancements in smart building technologies—like automated lighting, smart
thermostats, and energy management systems—can assist in reducing the impact of
inefficient occupant behavior by providing feedback and automatic adjustments.
●However, occupants still need to be aware of how their actions affect energy usage to avoid
bypassing or ignoring these systems.
●While green retrofitting enhances a building's sustainability through physical upgrades, its true
impact is closely tied to the behavior of its occupants.
●Promoting energy-conscious habits, alongside technological retrofits, is essential to achieving
the desired environmental and economic benefits.
25
Lighting Retrofit for Green Retrofitting
●A lighting retrofit is a key component of green retrofitting projects, focusing on improving the
energy efficiency and sustainability of a building’s lighting system.
●This process typically involves replacing outdated or inefficient lighting fixtures, such as
incandescent or fluorescent bulbs, with more energy-efficient alternatives like LED (Light
Emitting Diode) or CFL (Compact Fluorescent Lamp) lights.
●LED lighting, in particular, uses significantly less energy and has a much longer lifespan,
making it a cost-effective and environmentally friendly choice.
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●A lighting retrofit is a key component of green retrofitting projects, focusing on improving the
energy efficiency and sustainability of a building’s lighting system.
●This process typically involves replacing outdated or inefficient lighting fixtures, such as
incandescent or fluorescent bulbs, with more energy-efficient alternatives like LED (Light
Emitting Diode) or CFL (Compact Fluorescent Lamp) lights.
●LED lighting, in particular, uses significantly less energy and has a much longer lifespan,
making it a cost-effective and environmentally friendly choice.
26
Lighting Retrofit for Green Retrofitting
●Beyond simply replacing bulbs, lighting retrofitting can also include the installation of
advanced lighting controls, such as motion sensors, daylight harvesting systems, and
dimmers, which adjust lighting levels based on occupancy and available natural light.
●These controls help reduce unnecessary energy use and provide more optimized lighting
solutions tailored to the needs of the space.
●Incorporating natural lighting through retrofitting can further enhance energy savings.
●The use of skylights, larger windows, or reflective surfaces can maximize the use of daylight,
reducing dependence on artificial lighting during the daytime.
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●Beyond simply replacing bulbs, lighting retrofitting can also include the installation of
advanced lighting controls, such as motion sensors, daylight harvesting systems, and
dimmers, which adjust lighting levels based on occupancy and available natural light.
●These controls help reduce unnecessary energy use and provide more optimized lighting
solutions tailored to the needs of the space.
●Incorporating natural lighting through retrofitting can further enhance energy savings.
●The use of skylights, larger windows, or reflective surfaces can maximize the use of daylight,
reducing dependence on artificial lighting during the daytime.
27
Lighting Retrofit for Green Retrofitting
●The benefits of lighting retrofits in green retrofitting are twofold: they reduce energy
consumption, thus lowering utility costs and carbon emissions, while also improving the
lighting quality of indoor spaces, creating a more comfortable and productive environment for
occupants.
●Overall, lighting retrofits play a critical role in enhancing the sustainability and energy
performance of retrofitted buildings.
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●The benefits of lighting retrofits in green retrofitting are twofold: they reduce energy
consumption, thus lowering utility costs and carbon emissions, while also improving the
lighting quality of indoor spaces, creating a more comfortable and productive environment for
occupants.
●Overall, lighting retrofits play a critical role in enhancing the sustainability and energy
performance of retrofitted buildings.
28
HVAC Retrofit for Green Retrofitting
●HVAC (Heating, Ventilation, and Air Conditioning) retrofits are a vital aspect of green
retrofitting, aimed at improving the energy efficiency and environmental performance of
buildings.
●HVAC systems are often the largest energy consumers in a building, especially in climates
requiring substantial heating or cooling.
●By upgrading these systems during retrofits, significant energy savings and reductions in
carbon emissions can be achieved.
29
●HVAC (Heating, Ventilation, and Air Conditioning) retrofits are a vital aspect of green
retrofitting, aimed at improving the energy efficiency and environmental performance of
buildings.
●HVAC systems are often the largest energy consumers in a building, especially in climates
requiring substantial heating or cooling.
●By upgrading these systems during retrofits, significant energy savings and reductions in
carbon emissions can be achieved.
29
HVAC Retrofit for Green Retrofitting
●An HVAC retrofit typically involves replacing outdated or inefficient heating and cooling
equipment with energy-efficient alternatives, such as high-efficiency furnaces, air
conditioners, heat pumps, or boilers.
●Modern systems often come with advanced features like variable-speed motors, smart
thermostats, and zoning capabilities, which allow for more precise control over temperature
and energy usage, reducing waste.
●Improving the ventilation system is another key aspect of an HVAC retrofit. This includes
upgrading air ducts, improving insulation, and adding energy recovery ventilators (ERVs) to
maintain indoor air quality while minimizing energy loss.
●Proper insulation and sealing of ducts help reduce energy loss and ensure the HVAC system
operates at peak efficiency.
30
●An HVAC retrofit typically involves replacing outdated or inefficient heating and cooling
equipment with energy-efficient alternatives, such as high-efficiency furnaces, air
conditioners, heat pumps, or boilers.
●Modern systems often come with advanced features like variable-speed motors, smart
thermostats, and zoning capabilities, which allow for more precise control over temperature
and energy usage, reducing waste.
●Improving the ventilation system is another key aspect of an HVAC retrofit. This includes
upgrading air ducts, improving insulation, and adding energy recovery ventilators (ERVs) to
maintain indoor air quality while minimizing energy loss.
●Proper insulation and sealing of ducts help reduce energy loss and ensure the HVAC system
operates at peak efficiency.
30
HVAC Retrofit for Green Retrofitting
●Incorporating renewable energy sources, such as solar-powered heating or geothermal heat
pumps, can further enhance the sustainability of the HVAC system, lowering reliance on fossil
fuels.
●Overall, HVAC retrofits contribute significantly to reducing energy consumption, improving
indoor air quality, and enhancing occupant comfort, making them a critical component of
green retrofitting initiatives aimed at creating more sustainable and efficient buildings.
31
●Incorporating renewable energy sources, such as solar-powered heating or geothermal heat
pumps, can further enhance the sustainability of the HVAC system, lowering reliance on fossil
fuels.
●Overall, HVAC retrofits contribute significantly to reducing energy consumption, improving
indoor air quality, and enhancing occupant comfort, making them a critical component of
green retrofitting initiatives aimed at creating more sustainable and efficient buildings.
31
Window Retrofit for Green Retrofitting
●Window retrofitting is an important element of green retrofitting that enhances a building’s
energy efficiency by upgrading or improving the performance of existing windows.
●Windows are a significant source of heat loss and gain, affecting indoor temperature
regulation and contributing to increased energy consumption for heating and cooling.
●By retrofitting windows, buildings can improve insulation, reduce energy waste, and create a
more sustainable and comfortable indoor environment.
32
●Window retrofitting is an important element of green retrofitting that enhances a building’s
energy efficiency by upgrading or improving the performance of existing windows.
●Windows are a significant source of heat loss and gain, affecting indoor temperature
regulation and contributing to increased energy consumption for heating and cooling.
●By retrofitting windows, buildings can improve insulation, reduce energy waste, and create a
more sustainable and comfortable indoor environment.
32
Window Retrofit for Green Retrofitting
●Window retrofitting is an important element of green retrofitting that enhances a building’s
energy efficiency by upgrading or improving the performance of existing windows.
●Windows are a significant source of heat loss and gain, affecting indoor temperature
regulation and contributing to increased energy consumption for heating and cooling.
●By retrofitting windows, buildings can improve insulation, reduce energy waste, and create a
more sustainable and comfortable indoor environment.
33
●Window retrofitting is an important element of green retrofitting that enhances a building’s
energy efficiency by upgrading or improving the performance of existing windows.
●Windows are a significant source of heat loss and gain, affecting indoor temperature
regulation and contributing to increased energy consumption for heating and cooling.
●By retrofitting windows, buildings can improve insulation, reduce energy waste, and create a
more sustainable and comfortable indoor environment.
33
Window Retrofit for Green Retrofitting
●A typical window retrofit involves replacing single-pane or inefficient windows with
energy-efficient alternatives, such as double- or triple-glazed windows.
●These windows often come with features like low-emissivity (low-E) coatings that reduce heat
transfer and block harmful UV rays while allowing natural light to enter.
●Argon gas fills and insulated frames can also enhance thermal performance by minimizing
heat loss during winter and heat gain during summer.
34
●A typical window retrofit involves replacing single-pane or inefficient windows with
energy-efficient alternatives, such as double- or triple-glazed windows.
●These windows often come with features like low-emissivity (low-E) coatings that reduce heat
transfer and block harmful UV rays while allowing natural light to enter.
●Argon gas fills and insulated frames can also enhance thermal performance by minimizing
heat loss during winter and heat gain during summer.
34
Window Retrofit for Green Retrofitting
●Window retrofits can also include upgrading window seals, adding weatherstripping, or
installing storm windows to improve airtightness.
●This prevents drafts, reduces energy loss, and improves the overall thermal envelope of the
building.
●Additionally, window films and shading devices, such as awnings or reflective coatings, can
be applied to existing windows to control solar heat gain and reduce the need for artificial
cooling.
35
●Window retrofits can also include upgrading window seals, adding weatherstripping, or
installing storm windows to improve airtightness.
●This prevents drafts, reduces energy loss, and improves the overall thermal envelope of the
building.
●Additionally, window films and shading devices, such as awnings or reflective coatings, can
be applied to existing windows to control solar heat gain and reduce the need for artificial
cooling.
35
Window Retrofit for Green Retrofitting
●By reducing energy consumption for heating and cooling, window retrofits lower utility costs
and carbon emissions, making them an essential strategy in green retrofitting projects aimed
at enhancing building sustainability and occupant comfort.
36
●By reducing energy consumption for heating and cooling, window retrofits lower utility costs
and carbon emissions, making them an essential strategy in green retrofitting projects aimed
at enhancing building sustainability and occupant comfort.
36
Window Retrofit for Green Retrofitting
●By reducing energy consumption for heating and cooling, window retrofits lower utility costs
and carbon emissions, making them an essential strategy in green retrofitting projects aimed
at enhancing building sustainability and occupant comfort.
37
●By reducing energy consumption for heating and cooling, window retrofits lower utility costs
and carbon emissions, making them an essential strategy in green retrofitting projects aimed
at enhancing building sustainability and occupant comfort.
37
Green Roof Retrofit for Green Retrofitting
●A green roof retrofit involves transforming a traditional roof into a vegetative surface, where
plants and soil replace conventional roofing materials.
●This is a key green retrofitting strategy designed to improve energy efficiency, manage
stormwater, and enhance the environmental sustainability of buildings.
●Green roofs provide a layer of insulation, reducing heat transfer between the building interior
and the external environment.
●This helps lower the energy demand for heating in the winter and cooling in the summer,
making the building more energy-efficient.
38
●A green roof retrofit involves transforming a traditional roof into a vegetative surface, where
plants and soil replace conventional roofing materials.
●This is a key green retrofitting strategy designed to improve energy efficiency, manage
stormwater, and enhance the environmental sustainability of buildings.
●Green roofs provide a layer of insulation, reducing heat transfer between the building interior
and the external environment.
●This helps lower the energy demand for heating in the winter and cooling in the summer,
making the building more energy-efficient.
38
Green Roof Retrofit for Green Retrofitting
●There are two main types of green roofs: extensive and intensive.
●Extensive green roofs are lightweight and have a shallow layer of soil with low-maintenance
plants, while intensive green roofs feature deeper soil and a wider variety of vegetation,
requiring more structural support and maintenance.
●Both types contribute to improving thermal performance and reducing the urban heat island
effect, where cities become significantly warmer than surrounding areas due to
heat-absorbing surfaces like roofs and pavement.
39
●There are two main types of green roofs: extensive and intensive.
●Extensive green roofs are lightweight and have a shallow layer of soil with low-maintenance
plants, while intensive green roofs feature deeper soil and a wider variety of vegetation,
requiring more structural support and maintenance.
●Both types contribute to improving thermal performance and reducing the urban heat island
effect, where cities become significantly warmer than surrounding areas due to
heat-absorbing surfaces like roofs and pavement.
39
Green Roof Retrofit for Green Retrofitting
●Green roofs also play a critical role in managing stormwater by absorbing rainfall, reducing
runoff, and decreasing the load on urban drainage systems.
●This mitigates the risk of flooding and reduces water pollution.
●Furthermore, green roofs enhance biodiversity by providing habitat for birds and insects,
improving air quality, and creating more visually appealing urban spaces.
●A green roof retrofit is a multifunctional approach in green retrofitting that not only improves
energy efficiency but also contributes to environmental benefits like stormwater management,
urban cooling, and enhanced biodiversity, making buildings more sustainable and resilient.
40
●Green roofs also play a critical role in managing stormwater by absorbing rainfall, reducing
runoff, and decreasing the load on urban drainage systems.
●This mitigates the risk of flooding and reduces water pollution.
●Furthermore, green roofs enhance biodiversity by providing habitat for birds and insects,
improving air quality, and creating more visually appealing urban spaces.
●A green roof retrofit is a multifunctional approach in green retrofitting that not only improves
energy efficiency but also contributes to environmental benefits like stormwater management,
urban cooling, and enhanced biodiversity, making buildings more sustainable and resilient.
40
Thank
you!
@DrRohanDasgupta
41
you!
@DrRohanDasgupta
41
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