Introducing the New IESVE Passivent Tool

IES and Passivent showcase the new dedicated VE Navigator and how Passivent products can be embedded within your design to help create better educational buildings and healthier spaces.

Using an example school model, they guide you through the stepped process of preparing your building model, importing and configuring Passivent products and applying them to rooms, thermal simulation and compliance analysis. The also cover how to update the model for BB101: 2018 compliance, and how the same VE model can be used to assess CIBSE TM52.

1. Introducing the New IESVE Passivent Tool 11 th September, 2024

2. Welcome and Introduction Introduction and Overview of Passivent Introducing the New IESVE Passivent Tool Q&A / Discussion with all presenters Today’s Agenda  

3. Your Speakers   John Service, IES Huw Poppy, Passivent Niall Gibson, IES

4. IESVE 2024 New Features / Enhancements Parametric Simulation https://go.iesve.com/parametric-simulation-with-iesve-software-aug-24-na/web New Login for IESVE Central Plant Heat Pumps coupling to Heat Transfer Loop as water source and/or sink ASHRAE 90.1 2016 / 2019 -  Energy Cost Budget Translucent Shade - Profile Update to Scotland Section 63 VE plug-in for SketchUp compatible with SketchUp 2024  www.iesve.com

5. Introduction and overview of Passivent Huw Poppy Business Operations Manager & Secretary of the CIBSE Natural Ventilation Group

6. Who are Passivent? Design and manufacture low energy natural ventilation systems. Predominantly for educational and commercial buildings. Products can be integrated within the roof, external façade or internal partitions of a building. Range includes fully natural and hybrid ventilation systems plus natural daylight and moisture removal solutions. Help to improve air quality, control CO ₂ , temperature and humidity.

7. Group structure Passivent is a division of Building Product Design Ltd, a wholly owned subsidiary of Wienerberger after its acquisition by them in 2019. As a group, Building Product Design is widely experienced in ventilation solutions, condensation control and energy efficiency.  Passivent was a pioneer of natural ventilation and is a leading UK company with over 40 years experience in this field.

8. Building Product Design Group Passivent Design and manufacture low energy natural ventilation systems. Kingfisher Louvres Architectural aluminium l ouvre systems for ventilation, screening, weather protection, acoustic attenuation and solar shading. Glidevale Protect Airtightness and construction membranes, roofing underlays and roofing accessories. Richmond Germany Own branded roofing and construction membranes in mainland Europe.

9. The OVO Hydro, Glasgow V & A Museum, Dundee Isle of Man Ferry Terminal Performance Archery Centre, Lilleshall Matfen Hall, Northumberland

10. Product range – Roof ventilation terminals AIRSCOOP ® Roof ventilation terminal Displacement ventilation for large halls and deep plan spaces. HYBRID PLUS AIRSTRACT ® Roof ventilation terminal Features of Airstract terminal with mixing fan. 3 modes of operation. AIRSTRACT ® Roof ventilation terminal Exhaust outlet for passive stack strategies with façade ventilators. LITEVENT AIRSTRACT ® Roof ventilation terminal Combined controllable ventilator and rooflight for natural ventilation and natural daylighting.

11. Product range – Aircool façade ventilators AIRCOOL ® F açade ventilators Aircool Thermal Aircool (with LTHW coil) Acoustic Aircool HYBRID AIRCOOL ® F açade ventilators Hybrid Aircool Thermal Hybrid Aircool

12. Variables affecting a natural ventilation strategy There is rarely a ‘one size fits all’ product or strategy across the range of buildings we work on. Variables include: Floor to ceiling height Room depth Building orientation Extent of glazing Thermal mass Location of building Climate Important to be able to predict the outcome of the natural ventilation strategy and whether it will ventilate the building effectively.

13. A well designed naturally ventilated building will provide an excellent indoor air quality rate and we use CO 2 as an indicator of this. We breathe out CO 2 as part of our normal respiration. Increasing air tightness standards for buildings. Low air infiltration through building fabric or cracks in structure. CO 2 build up in the room can lead to nausea, sickness and tiredness. Winter strategy to deal with indoor air quality

14. Summer strategy to deal with overheating Factors affecting overheating: Outside air temperature Glazing Building orientation Building materials used Internal activities e.g. IT spaces, occupancy, artificial lighting High thermal mass (heavy weight buildings) Perform better during warmer weather – heat locked into structure and prevents internal space from heating up. Low thermal mass (light weight buildings) Performs worse during warmer weather Night cooling strategy Cooler evening air can chill the structure down.

15. Thermal modelling to aid building design Accurate simulation of real-world conditions aids the design of a building. Weather files Output internal temperatures hour by hour using closest available weather files for the site location. Advanced climate change weather files Models the effects on the building beyond the normal 20 years to see the effects of a warmer climate.

16. Why is it so important to get the design right? Duty of care to size natural ventilation openings correctly. Compliance with regulations e.g. Building Bulletin 101 (BB101) - mandatory for all school buildings Prescribes maximum allowable internal temperatures & CO ₂ levels No cold draughts, particularly on a cold winter’s day. IES is invaluable with tightening regulations and contractor liabilities. Free running or low energy natural ventilation systems will help achieve more net zero carbon buildings. Passivent / IES partnership Provides reassurance to building designers that outcomes can be accurately predicted.

17. Image courtesy of TG Escapes Thank you for your time Follow Passivent on Linkedin for up-to-date news. www.passivent.com

18. Design Standards including: Department for Education (DfE) Building Bulletin 101 (BB101) CIBSE TM52 Introducing the Passivent Navigator in IESVE Live Demo: example school sports hall project BB101 results outputs from IESVE What We W ill Cover  

19. Design Standards  

20. Focus on Natural Ventilation methods No Mechanical Ventilation in teaching spaces DfE Department for Education www.iesve.com

21. www.iesve.com BB 101 Temperature Requirements

22. Lower CO 2 levels increase occupant comfort Mechanical ventinaltion demands lower CO 2 levels BB 101 CO 2 Requirements www.iesve.com

23. Safety issues: children may climb out External Noise could limit window opening ability Issues with Large Openings www.iesve.com

24. Guidance on workflows for setting up designs or carrying out complex analyses e.g. compliance. Passivent Navigator guides you step-by-step through: Importing the products into your model Configuring their operation Preparing and applying them to rooms Thermal simulation and compliance analysis IESVE Navigators www.iesve.com

25. Cannot add more windows Window openable area limited, small top and bottom windows only Safety is paramount Noise pollution nearby My Clients Issues Restrictions to the design www.iesve.com

26. Look at baseline model and its BB101 results Move into our Navigator and add Passivent Airscoop ® Roof Ventilation Terminals to the Sports Hall Return to our results and view the impact on the model School Sports Hall Case Study Live Demo  

27. Thank you Any Questions ?