IESVE for Early Stage Design and Planning

This instalment looked at building performance at the earliest stages of your project, covering Interoperability, Solar and Daylighting.

1. IESVE for Early Stage
Design & Planning
Achieving Excellence Session #4
Niall Gibson –Head of IESVE Sales, UK
Douglas Bell –Daylighting & BIM Consultancy Manager
22
nd
May 2024

2. Achieving Excellence with IESVE
Webinar Series
www.iesve.com
—Session 1: Keep Your Cool with the Building Regulations -Part O
—go.iesve.com/achieving-excellence-webinar-building-regulations-part-o/eshot
—Session 2: M&V for Building Performance
—go.iesve.com/achieving-excellence-webinar-m-and-v-for-building-performance/eshot
—Session 3: IESVE for HVAC Simulation
—go.iesve.com/achieving-excellence-webinar-iesve-for-hvac-simulation/eshot

3. www.iesve.com
—Interoperability:
—Revit, SketchUp, Rhino
—gbXML, Pollination (.GEM)
—Daylight & Sunlight Studies:
—Why & When –Standards & Guidance
—IESVE Sunlight & Daylight
—Case Study: Multi-Residential Apartment Block
What will be covered?

4. Performance Drivers
www.iesve.com
Never too early for Building Performance Modelling

5. IESVE for Early Stage Design & Planning
www.iesve.com
Sunlight & Daylight
Why & When?

6. Guidance / Standards
www.iesve.com

7. The London Plan
—The Mayor of London intends to produce a single guidance
document
—Adequate sized rooms
—Maximise dual aspect apartments
—Single aspect only provided where appropriate design
solution
—Design development should provide sufficient daylight &
sunlight to new & existing housing
—Wind, daylight, sunlight penetration & temperature
conditions around the buildings carefully considered.
www.iesve.com

8. When Daylight & Sunlight Should Be Utilised
Conceptual Design Studies
—Shadow Analysis
—Sunlight –Existing/Proposed Amenity Spaces
—Sunlight –Existing Buildings
—Sunlight –Proposed Buildings (Window Positions Estimated)
—Daylight to Existing Buildings
Why at Conceptual Design?
—You can change it
—Mitigate risk
—Avoid Retrofit
—Analysis is cheap
Detailed Design
—Sunlight to Proposed Buildings
—Daylight to Proposed Buildings
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9. IESVE for Early Stage Design & Planning
www.iesve.com
Interoperability

10. Interoperability
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11. Interoperability
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12. Interoperability
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13. IESVE for Early Stage Design & Planning
www.iesve.com
IESVE –Sunlight & Daylight

14. IESVE –Sunlight & Daylight
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15. IESVE for Early Stage Design & Planning
www.iesve.com
Analysis –Case Study

16. Case Study
www.iesve.com

17. Design Tools –Massing Options
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Massing Option 1 Massing Option 3
Massing Option 2

18. Massing Options
www.iesve.com
Massing Option 1 Massing Option 2 Massing Option 3

19. Sunlight to Proposed Amenities
www.iesve.com
Massing Option 1 Massing Option 2 Massing Option 3
Section 3.3.17 of the BRE Guide (3rd Edition), for a space to appear adequately sunlit
throughout the year, at least half of the garden or amenity space should receive at least 2 hours
of sunlight on March 21st.

20. Sunlight to Proposed Amenities
Massing Option 1 Massing Option 2 Massing Option 3
The below screenshots show the absolute scale showing all hours of sunlight received on this
amenity for the 4 massing options.
www.iesve.com

21. Sunlight to Proposed Amenities
Massing Option 1 Massing Option 2 Massing Option 3
ThebelowscreenshotsshowtheSunlightReceivedforaminimumof2hoursfortheproposed
amenityareainthe4massingoptions.
www.iesve.com
Receives more than 2 hours of sunlight
Receives less than 2 hours of sunlight

22. Sunlight to Proposed Amenities
www.iesve.com
Massing Option 1 Massing Option 2 Massing Option 3
Total
Area
(m2)
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Comment
Total Area
(m2)
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Comment
Total Area
(m2)
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Comment
1,220 421 35% x 1,300 950 73% ✓ 958 650 68% ✓
2 hours of sunlight on March 21st
—Option 1: 35%
—Option 2: 73%
—Option 3: 69%

23. Sunlight to Existing Amenities
Section3.3.17oftheBREGuide(3rdEdition),Existingamenity
spaces,iftheyarealreadybelowthe50%thresholdthentheBRE
recommendstheresultskepttowithin80%oftheexisting
situation.
www.iesve.com
Existing Situation
Massing Option 1 Massing Option 2 Massing Option 3

24. Sunlight to Existing Amenities
Thebelowscreenshotsshowtheabsolutescaleshowingallhours
ofsunlightreceivedonthisamenityforthe4massingoptionsas
wellastheexistingsituation.
www.iesve.com
Existing Situation
Massing Option 1 Massing Option 2 Massing Option 3

25. Sunlight to Existing Amenities
Thebelowscreenshotsshowtheabsolutescaleshowingallhours
ofsunlightreceivedonthisamenityforthe4massingoptionsas
wellastheexistingsituation.
www.iesve.com
Existing Situation
Massing Option 1 Massing Option 2 Massing Option 3
Receives more than 2 hours of sunlight
Receives less than 2 hours of sunlight

26. Sunlight to Existing Amenities
www.iesve.com
Total
Area
(m2)
Existing Situation Massing Option 1 Massing Option 2 Massing Option 3
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Op1 vs
Existing
Comment
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Op2 vs
Existing
Comment
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Op3 vs
Existing
Comment
3,2592,867 88% 2,301 71% 80% ✓ 2,742 84% 96% ✓ 2,343 72% 82% ✓
Comparisonfortheresultsbetweenfourmassingoptionsandthe
existingsituation.

27. Daylight to Existing Buildings
The Vertical Sky Component (VSC) definition from the BRE Guide (3rd Edition) is described below:
“This is a measure of the amount of light reaching a window. It is the ratio of that part of illuminance,
at a point on a given vertical plane, that is received directly from a CIE standard overcast sky, to
illuminance on a horizontal plane due to an obstructed hemisphere of this sky. Usually the ‘given
vertical plane’ is the outside of a window wall. The VSC does not include reflected light, either from the
ground or from other buildings.”
The maximum possible VSC value for an opening in a vertical wall, assuming no obstructions, is 40%. This
VSC at any given point can be tested in RadianceIES, a module of IES VE.
For typical residential schemes the BRE Guide (3nd Edition) states the following in Section 2.2.7:
“If this VSC is greater than 27% then enough skylight should still be reaching the window of the existing
building. Any reduction below this level should be kept to a minimum. If the VSC, with the new
development in place, is both less that 27% and less than 0.8 times its former value, occupants of the
existing building will notice the reduction in the amount of skylight. The area lit by the window is likely
to appear more gloomy, and electric lighting will be needed more of the time.”
www.iesve.com

28. Daylight to Existing Buildings
www.iesve.com
Building1
Building2
Building3
Building4

29. Daylight to Existing Buildings
Building 1 –Reference Image
www.iesve.com

30. Daylight to Existing Buildings
www.iesve.com
Comparison between Existing and Proposed for Building 1
Ref:
Existing Situation
VSC
Massing Option 1 Massing Option 2 Massing Option 3
Proposed
Situation
VSC
Proposed VSC as a %
of Existing Situation
Comment
Proposed
Situation
VSC
Proposed VSC as a %
of Existing Situation
Comment
Proposed Situation
VSC
Proposed VSC as a %
of Existing Situation
Comment
1 38.91 33.90 92% ✓ 38.74 100% ✓ 26.68 72% x
2 38.49 32.50 85% ✓ 38.42 100% ✓ 26.46 69% x
3 37.65 31.04 82% ✓ 37.44 99% ✓ 26.03 69% x
4 36.9 29.67 80% ✓ 36 98% ✓ 25.06 67% x
5 35.84 28.95 87% ✓ 33.98 100% ✓ 25.02 75% x
6 34.31 26.90 76% x 31.43 92% ✓ 24.15 68% x
7 32.26 25.70 75% x 29.09 90% ✓ 22.97 67% x
8 29.8 24.31 73% x 27.12 91% ✓ 21.96 66% x
9 27.71 22.99 71% x 24.96 90% ✓ 21.35 66% x
10 39.11 26.76 68% x 38.9 99% ✓ 21.73 56% x
11 38.62 24.97 65% x 38.4 99% ✓ 21.73 56% x
12 37.96 23.36 61% x 37.79 100% ✓ 21.37 56% x
13 37.15 22.13 59% x 34.4 93% ✓ 20.48 54% x
14 36.19 20.97 57% x 30.49 84% ✓ 20.27 55% x
15 32.41 20.03 56% x 26.17 81% ✓ 20.07 56% x
16 30.25 18.35 53% x 24.07 80% ✓ 19.16 55% x
17 27.62 18.40 54% x 21.36 77% x 18.93 56% x
18 24.93 17.19 53% x 20.12 81% ✓ 17.89 55% x
19 39.06 17.48 45% x 38.78 99% ✓ 14.36 37% x
20 38.53 14.44 37% x 38.55 100% ✓ 14.31 37% x
21 38 12.26 32% x 37.94 100% ✓ 14.19 37% x
22 37.16 10.48 28% x 32.35 87% ✓ 13.88 37% x
23 35.74 9.90 27% x 25.42 71% x 13.85 37% x
24 31.25 8.49 24% x 19.18 61% x 13.39 37% x
25 26.64 7.68 22% x 15.31 57% x 12.57 36% x
26 22.45 7.79 23% x 12.58 56% x 12.12 36% x
27 19.24 7.33 22% x 10.67 55% x 11.10 34% x
X
The points tested have a VSC value
less than 0.8 times the existing
scheme VSC value and are less than
15%.
✓
The points tested have a VSC value
greater than 27%, or their VSC value
is greater than 0.8 times their
former value, with the proposed
development in place. Therefore,
these points exceed BRE
recommendations.

31. Daylight to Existing Buildings
Building 1
WhencomparedtotheExistingSituation,forthetestedpointsinBuilding1,thenumberofpointsin
linewiththerecommendedvaluesassetoutintheBREGuidelines:
−Option1:19%(5outof27points)
−Option2:78%(21outof27points)
−Option3:0%(0outof27points)
Massing Option 1 Massing Option 2 Massing Option 3
Compliant
NonCompliant
www.iesve.com

32. Daylight to Existing Buildings
Building 4 –Reference Image
www.iesve.com

33. Daylight to Existing Buildings
www.iesve.com
Comparison between Existing and Proposed for Building 4
X
The points tested have a VSC value
less than 0.8 times the existing
scheme VSC value and are less than
15%.
✓
The points tested have a VSC value
greater than 27%, or their VSC value
is greater than 0.8 times their
former value, with the proposed
development in place. Therefore,
these points exceed BRE
recommendations.
Ref:
Existing
Situation VSC
Massing Option 1 Massing Option 2 Massing Option 3
Proposed
Situation VSC
Proposed VSC as a % of
Existing Situation
Comment
Proposed
Situation VSC
Proposed VSC as a
% of Existing
Situation
Comment
Proposed
Situation VSC
Proposed VSC as a % of
Existing Situation
Comment
1 38.74 38.07 98% ✓ 37.37 96% ✓ 35.97 93% ✓
2 37.74 37.11 98% ✓ 35.92 95% ✓ 35.23 93% ✓
3 38.79 37.95 98% ✓ 36.13 93% ✓ 35.27 91% ✓
4 37.77 37.05 98% ✓ 33.97 90% ✓ 34.76 92% ✓
5 32.68 32.50 99% ✓ 31.79 97% ✓ 28.29 87% ✓
6 37.36 35.41 95% ✓ 36.01 96% ✓ 30.03 80% ✓
7 38.15 36.53 96% ✓ 37.54 98% ✓ 31.97 84% ✓
8 37.11 35.69 96% ✓ 36.62 99% ✓ 31.15 84% ✓
9 34.39 33.96 99% ✓ 31.98 93% ✓ 32.73 95% ✓
10 31.05 31.15 100% ✓ 29.18 94% ✓ 29.57 95% ✓
11 27.8 28.01 101% ✓ 25.77 93% ✓ 27.09 97% ✓
12 24.86 25.35 102% ✓ 22.85 92% ✓ 24.40 98% ✓
13 22.4 22.56 101% ✓ 20.62 92% ✓ 21.77 97% ✓
14 35.45 35.08 99% ✓ 30.82 87% ✓ 33.53 95% ✓
15 32.52 32.67 100% ✓ 27.74 85% ✓ 31.15 96% ✓
16 29.52 30.00 102% ✓ 25.43 86% ✓ 28.94 98% ✓
17 26.99 26.87 100% ✓ 22.72 84% ✓ 26.16 97% ✓
18 24.17 24.12 100% ✓ 20.24 84% ✓ 22.69 94% ✓
19 35.01 35.29 101% ✓ 26.25 75% x 33.03 94% ✓
20 32.19 33.43 104% ✓ 23.53 73% x 31.35 97% ✓
21 29.15 29.16 100% ✓ 21.13 72% x 29.08 100% ✓
22 26.07 24.69 95% ✓ 19.46 75% x 24.14 93% ✓
23 23.35 21.53 92% ✓ 17.33 74% x 19.78 85% ✓
24 17.75 14.98 84% ✓ 16.29 92% ✓ 11.58 65% x
25 17.62 14.89 85% ✓ 16.51 94% ✓ 11.88 67% x
26 16.59 13.53 82% ✓ 14.79 89% ✓ 11.43 69% x
27 14.65 12.64 86% ✓ 13.49 92% ✓ 10.36 71% x
28 13.8 11.38 82% ✓ 12.74 92% ✓ 10.35 75% x
29 13.38 11.36 85% ✓ 13.21 99% ✓ 10.39 78% x
30 36.62 34.25 94% ✓ 35.75 98% ✓ 29.74 81% ✓
31 35.64 33.14 93% ✓ 34.49 97% ✓ 28.91 81% ✓
32 34.2 31.59 92% ✓ 32.85 96% ✓ 28.04 82% ✓
33 32.25 30.21 94% ✓ 31.03 96% ✓ 26.71 83% ✓
34 30.81 28.68 93% ✓ 29.54 96% ✓ 25.37 82% ✓
35 14.25 12.20 86% ✓ 14.00 98% ✓ 11.36 80% ✓

34. Daylight to Existing Buildings
Building 4
WhencomparedtotheExistingSituation,forthetestedpointsinBuilding4,theno.ofpointsthatare
inlinewiththerecommendedvaluesassetoutintheBREGuidelines:
−Option1:100%(35outof35points)
−Option2:86%(30outof35points)
−Option3:83%(29outof35points)
Massing Option 1 Massing Option 2 Massing Option 3
Compliant
NonCompliant
www.iesve.com

35. Sunlight to Existing Buildings
The BRE Guide (3rd Edition) states that interiors where the occupants expect sunlight should receive at least one
quarter (25%) of annual probable sunlight hours, including at least 5% of annual probable sunlight hours during the
winter months, between 21st September and 21st March.
“If a living room of an existing dwelling has a main window facing within 90°of due south, and any part of a new
development subtends an angle of more than 25°to the horizontal measured from the centre of the window in a
vertical section perpendicular to the window, then the sunlight of the existing dwelling may be adversely affected.
This will be the case if the centre of the window:
-Receives less than 25% of annual probable sunlight hours and less than 0.80 times its former annual value: or les
than 5% of annual probable sunlight hours between 21 September and 21 March and less than 0.80 times its
former value during that period:
-And also has a reduction in sunlight received over the whole year greater than 4% of annual probable sunlight
hours.”
If a window reference point can receive more than 25% of annual probable sunlight hours, including at least 5% of
annual probable sunlight hours during the winter months between 21st September and 21st March, then the room
should still receive enough sunlight. Any reduction in sunlight access below this level should be kept to a minimum.
If the available sunlight hours are both less than the amount given and less than 0.8 times their former value, either
over the whole year or just during the winter months (21st September to 21st March) and reduction in sunlight across
the year has a greater reduction than 4%, then the occupants of the existing building will notice the loss of sunlight.
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36. Sunlight to Existing Buildings
Building 4 –Reference Image
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37. Sunlight to Existing Buildings
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✓/✓
Both the Proposed Scheme annual and
winter APSH results are greater than
25% and 5% respectively, or are
greater than 0.8 times their former
value or are less than 4% overall
annual loss with the proposed
development in place.
✓/X
The annual APSH results are greater
than 25% or are greater than 0.8 times
their former value with the proposed
development in place, however, the
winter results are below the
guidelines.
X/✓
The annual APSH results are less than
the recommended values, however,
the winter APSH results are greater
than 5% or greater than 0.8 times their
former value with the proposed
development in place.
X/X
Both the annual and winter APSH
results are less than 25% and 5%
respectively, and less than 0.8 times
their former value or are greater than
4% overall annual loss with the
proposed development in place.
Ref:
Existing
Situation
Massing Option 1 Massing Option 2 Massing Option 3
Annual Winter Annual Winter
Proposed
APSH
as a % of
Existing
(Annual)
Proposed
APSH
as a % of
Existing
(Winter)
Comment Annual Winter
Proposed APSH
as a % of
Existing
(Annual)
Proposed APSH
as a % of
Existing
(Winter)
Comment Annual Winter
Proposed
APSH
as a % of
Existing
(Annual)
Proposed APSH
as a % of Existing
(Winter)
Comment
1 74.12 33.44 72.42 31.28 98% 94% ✓/✓ 72.57 31.63 98% 95% ✓/✓ 65.09 26.20 88% 78% ✓/✓
2 72.2 31.23 68.94 27.92 95% 89% ✓/✓ 67.46 26.36 93% 84% ✓/✓ 63.30 23.30 88% 75% ✓/✓
3 74.64 33.66 72.04 31.07 97% 92% ✓/✓ 70.77 29.80 95% 89% ✓/✓ 64.90 26.03 87% 77% ✓/✓
4 72.1 31.78 68.78 28.46 95% 90% ✓/✓ 64.82 24.50 90% 77% ✓/✓ 61.83 24.29 86% 76% ✓/✓
5 54.6 26.03 51.99 23.41 95% 90% ✓/✓ 50.56 20.78 93% 80% ✓/✓ 44.73 18.64 82% 72% ✓/✓
6 59.86 27.07 57.48 24.69 96% 91% ✓/✓ 53.59 20.80 90% 77% ✓/✓ 49.44 19.43 83% 72% ✓/✓
7 61.65 28.47 60.26 27.08 98% 95% ✓/✓ 59.75 26.57 97% 93% ✓/✓ 51.21 19.96 83% 70% ✓/✓
8 59.82 27.73 58.27 26.18 97% 94% ✓/✓ 55.43 23.34 93% 84% ✓/✓ 49.20 18.69 82% 67% ✓/✓
9 65.77 25.86 61.75 21.88 94% 85% ✓/✓ 58.80 18.93 89% 73% ✓/✓ 57.23 19.45 87% 75% ✓/✓
10 60.44 21.87 56.62 18.07 94% 83% ✓/✓ 52.77 14.23 87% 65% ✓/✓ 53.40 16.94 88% 77% ✓/✓
11 55.16 18.59 53.00 16.47 96% 89% ✓/✓ 49.50 13.41 90% 72% ✓/✓ 50.64 16.19 92% 87% ✓/✓
12 48.55 15.34 47.77 14.59 98% 95% ✓/✓ 44.24 12.42 91% 81% ✓/✓ 46.07 14.98 95% 98% ✓/✓
13 42.82 12.54 43.20 12.93 101% 103% ✓/✓ 39.12 11.36 91% 91% ✓/✓ 40.22 12.04 94% 96% ✓/✓
14 68.39 28.66 65.33 25.63 96% 89% ✓/✓ 57.61 17.92 84% 63% ✓/✓ 58.80 21.65 86% 76% ✓/✓
15 62.03 24.38 59.99 22.36 97% 92% ✓/✓ 52.14 15.70 84% 64% ✓/✓ 54.37 19.93 88% 82% ✓/✓
16 57.44 21.84 54.55 16.97 95% 77% ✓/✓ 47.74 14.16 83% 65% ✓/✓ 51.13 19.02 89% 87% ✓/✓
17 51.5 17.98 48.89 15.40 95% 86% ✓/✓ 43.19 13.03 84% 72% ✓/✓ 44.71 14.69 87% 82% ✓/✓
18 44.6 13.45 43.52 12.39 98% 92% ✓/✓ 38.74 11.68 87% 87% ✓/✓ 38.22 10.56 86% 79% ✓/✓
19 67 27.61 64.95 25.57 97% 93% ✓/✓ 51.75 14.71 77% 53% ✓/✓ 57.68 21.81 86% 79% ✓/✓
20 62.03 23.9 61.67 23.54 99% 98% ✓/✓ 47.21 13.38 76% 56% ✓/✓ 56.36 21.73 91% 91% ✓/✓
21 55.39 19.64 51.40 15.66 93% 80% ✓/✓ 39.64 10.53 72% 54% ✓/✓ 50.40 18.69 91% 95% ✓/✓
22 46.5 12.95 43.36 9.95 93% 77% ✓/✓ 34.37 8.38 74% 65% ✓/✓ 38.46 9.78 83% 76% ✓/✓
23 42.28 11.32 37.94 7.78 90% 69% ✓/✓ 30.40 8.35 72% 74% ✓/✓ 30.93 5.93 73% 52% ✓/✓
24 24.09 13.38 19.41 8.70 81% 65% ✓/✓ 23.17 12.46 96% 93% ✓/✓ 15.53 5.90 64% 44% x/✓
25 24.49 13.06 18.87 7.44 77% 57% x/x 22.02 10.59 90% 81% ✓/✓ 15.87 5.65 65% 43% x/✓
26 22.56 11.13 17.03 5.60 75% 50% x/x 19.76 8.32 88% 75% ✓/✓ 14.26 4.04 63% 36% x/x
27 18.71 7.6 14.80 3.70 79% 49% x/x 17.07 5.97 91% 79% ✓/✓ 13.10 3.21 70% 42% x/x
28 16.28 5.29 13.03 2.04 80% 39% x/x 15.48 4.49 95% 85% ✓/✓ 11.98 2.20 74% 42% x/x
29 16.4 3.8 14.48 1.88 88% 49% x/x 15.98 3.39 97% 89% ✓/✓ 13.00 1.57 79% 41% x/x
30 57.86 25.75 53.96 21.87 93% 85% ✓/✓ 52.40 20.31 91% 79% ✓/✓ 45.96 17.33 79% 67% ✓/✓
31 55.64 23.57 51.99 20.05 93% 85% ✓/✓ 50.63 18.69 91% 79% ✓/✓ 45.33 16.84 81% 71% ✓/✓
32 52.04 21.5 47.62 15.83 92% 74% ✓/✓ 47.06 15.97 90% 74% ✓/✓ 44.27 15.94 85% 74% ✓/✓
33 48.21 18.15 41.03 11.17 85% 62% ✓/✓ 41.41 12.47 86% 69% ✓/✓ 39.28 13.57 81% 75% ✓/✓
34 41.27 11.65 37.49 8.03 91% 69% ✓/✓ 38.00 10.22 92% 88% ✓/✓ 33.75 8.38 82% 72% ✓/✓
35 17.91 6.36 15.11 3.03 84% 48% ✓/ x 18.12 6.29 101% 99% ✓/✓ 14.23 2.99 79% 47% ✓/✓

38. Sunlight to Existing Buildings
Building 4
−Option1:29no.(83%)
−Option2:35no.(100%)
−Option3:28no.(80%)
Massing Option 1 Massing Option 2 Massing Option 3
Compliant
NonCompliant
www.iesve.com

39. Massing Options
Massing Option 2a
www.iesve.com

40. Sunlight to Proposed Amenities
Section 3.3.17 of the BRE Guide (3rd Edition), for a space to appear adequately sunlit throughout the year, at least
half of the garden or amenity space should receive at least 2 hours of sunlight on March 21st.
www.iesve.com
Massing Option 2a

41. Sunlight to Proposed Amenities
Massing Option 1
Thebelowscreenshotsshowtheabsolutescaleshowingallhoursofsunlightreceivedonthis
amenityforthe4massingoptions.
www.iesve.com
Massing Option 2 Massing Option 2a Massing Option 3

42. Sunlight to Proposed Amenities
Massing Option 1
ThebelowscreenshotsshowtheSunlightReceivedforaminimumof2hoursfortheproposed
amenityareainthe4massingoptions.
www.iesve.com
Massing Option 2 Massing Option 2a Massing Option 3
Receives more than 2 hours of sunlight
Receives less than 2 hours of sunlight

43. Sunlight to Proposed Amenities
www.iesve.com
Thebelowtableshowsacomparisonfortheresultsbetweenthethreemassingoptions.
Massing Option 1 Massing Option 2 Massing Option 2a Massing Option 3
Total
Area
(m2)
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Comment
Total Area
(m2)
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Comment
Total Area
(m2)
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Comment
Total Area
(m2)
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Comment
1,220 421 35% x 1,300 950 73% ✓ 1,260 950 75% ✓ 958 650 68% ✓
OnMarch21st,thepercentageoftheproposedamenityareasthatreceivesatleast2hoursof
sunlightislistedbelowforeachmassingoption:
−Option1:35%
−Option2:73%
−Option2a:75%
−Option3:68%
Options2,2aand3arecomplyingwiththeBRErecommendations,whileOption1isnot.

44. As outlined in Section 3.3.17 of the BRE Guide (3rd Edition), in
the case of existing amenity spaces, if they are already below
the 50% threshold then the BRE recommends the results kept to
within 80% of the existing situation.
This analysis will be performed on the amenity space illustrated
in the images below for all four massing options.
Sunlight to Existing Amenities
Massing Option 1
www.iesve.com
Massing Option 2 Massing Option 2a Massing Option 3
Existing Situation

45. The below screenshots show the absolute scale showing all hours
of sunlight received on this amenity for the 4 massing options as
well as the existing situation.
Sunlight to Existing Amenities
Massing Option 1
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Massing Option 2 Massing Option 2a Massing Option 3
Existing Situation

46. The below screenshots show the absolute scale showing all hours
of sunlight received on this amenity for the 4 massing options as
well as the existing situation.
Sunlight to Existing Amenities
Massing Option 1
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Massing Option 2 Massing Option 2a Massing Option 3
Existing Situation
Receives more than 2 hours of sunlight
Receives less than 2 hours of sunlight

47. Sunlight to Proposed Amenities
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Thebelowtableshowsacomparisonfortheresultsbetweenthefourmassingoptionsandthe
existingsituation.
AllfourmassingoptionsarepassingtheBRErecommendationswithover50%oftheamenity
areareceivingatleast2hoursofsunlightonMarch21st.Options2and2aaretheclosesttothe
existingsituation.
Total
Area
(m2)
Existing Situation Massing Option 1 Massing Option 2 Massing Option 2a Massing Option 3
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Op1 vs
Existing
Comment
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Op2 vs
Existing
Comment
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Op2a vs
Existing
Comment
Area
Receiving
>2h (m2)
Percent
Receiving
>2h
Op3 vs
Existing
Comment
3,2592,867 88% 2,301 71% 80% ✓ 2,74284% 96% ✓ 2,74284% 96% ✓ 2,34372% 82% ✓

48. Ref:
Existing Situation
VSC
Massing Option 1 Massing Option 2 Massing Option 2a Massing Option 3
Proposed Situation
VSC
Proposed VSC as a % of
Existing Situation
Comment
Proposed Situation
VSC
Proposed VSC as a %
of Existing Situation
Comment
Proposed Situation
VSC
Proposed VSC as a % of
Existing Situation
Comment
Proposed Situation
VSC
Proposed VSC as a %
of Existing Situation
Comment
1 38.91 33.90 92% ✓ 38.74 100% ✓ 38.53 100% ✓ 26.68 72% x
2 38.49 32.50 85% ✓ 38.42 100% ✓ 38.56 100% ✓ 26.46 69% x
3 37.65 31.04 82% ✓ 37.44 99% ✓ 37.74 100% ✓ 26.03 69% x
4 36.9 29.67 80% ✓ 36 98% ✓ 36.33 98% ✓ 25.06 67% x
5 35.84 28.95 87% ✓ 33.98 100% ✓ 34.49 100% ✓ 25.02 75% x
6 34.31 26.90 76% x 31.43 92% ✓ 31.90 93% ✓ 24.15 68% x
7 32.26 25.70 75% x 29.09 90% ✓ 29.75 92% ✓ 22.97 67% x
8 29.8 24.31 73% x 27.12 91% ✓ 27.23 91% ✓ 21.96 66% x
9 27.71 22.99 71% x 24.96 90% ✓ 25.87 93% ✓ 21.35 66% x
10 39.11 26.76 68% x 38.9 99% ✓ 38.81 99% ✓ 21.73 56% x
11 38.62 24.97 65% x 38.4 99% ✓ 38.65 100% ✓ 21.73 56% x
12 37.96 23.36 61% x 37.79 100% ✓ 38.11 100% ✓ 21.37 56% x
13 37.15 22.13 59% x 34.4 93% ✓ 34.98 94% ✓ 20.48 54% x
14 36.19 20.97 57% x 30.49 84% ✓ 30.81 85% ✓ 20.27 55% x
15 32.41 20.03 56% x 26.17 81% ✓ 27.29 84% ✓ 20.07 56% x
16 30.25 18.35 53% x 24.07 80% ✓ 24.74 82% ✓ 19.16 55% x
17 27.62 18.40 54% x 21.36 77% x 22.28 81% ✓ 18.93 56% x
18 24.93 17.19 53% x 20.12 81% ✓ 20.77 83% ✓ 17.89 55% x
19 39.06 17.48 45% x 38.78 99% ✓ 39.06 100% ✓ 14.36 37% x
20 38.53 14.44 37% x 38.55 100% ✓ 37.9 98% ✓ 14.31 37% x
21 38 12.26 32% x 37.94 100% ✓ 38.11 100% ✓ 14.19 37% x
22 37.16 10.48 28% x 32.35 87% ✓ 34.45 93% ✓ 13.88 37% x
23 35.74 9.90 27% x 25.42 71% x 28.69 80% ✓ 13.85 37% x
24 31.25 8.49 24% x 19.18 61% x 22.98 74% x 13.39 37% x
25 26.64 7.68 22% x 15.31 57% x 18.55 70% x 12.57 36% x
26 22.45 7.79 23% x 12.58 56% x 15.22 68% x 12.12 36% x
27 19.24 7.33 22% x 10.67 55% x 12.96 67% x 11.10 34% x
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X -The points tested have a VSC value less than 0.8 times the existing scheme VSC value and are less than 15%.
✓-The points tested have a VSC value greater than 27%, or their VSC value is greater than 0.8 times their former value, with the proposed development in place. Therefore, these points
exceed BRE recommendations.
Daylight to Existing Buildings
Table Comparison between Existing and Proposed for Building 1

49. Daylight to Existing Buildings
Building 1
WhencomparedtotheExistingSituation,forthetestedpointsinBuilding1,thenumberofpointsin
linewiththerecommendedvaluesassetoutintheBREGuidelines:
−Option1:19%(5outof27points)
−Option2:78%(21outof27points)
−Option2a:85%(23outof27points)
−Option3:0%(0outof27points)
Massing Option 1 Massing Option 2 Massing Option 2a
Compliant
NonCompliant
Massing Option 3
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50. Daylight to Existing Buildings
Building 4 –Reference Image
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51. www.iesve.com
X -The points tested have a VSC value less than 0.8 times the existing scheme VSC value and are less than 15%.
✓-The points tested have a VSC value greater than 27%, or their VSC value is greater than 0.8 times their former value, with the proposed development in place.
Therefore, these points exceed BRE recommendations.
Daylight to Existing Buildings
Table Comparison between Existing and Proposed for Building 4
Ref:
Existing
Situation VSC
Massing Option 1 Massing Option 2 Massing Option 2a Massing Option 3
Proposed
Situation VSC
Proposed VSC as a %
of Existing Situation
Comment
Proposed
Situation VSC
Proposed VSC as a %
of Existing Situation
Comment
Proposed
Situation VSC
Proposed VSC as a %
of Existing Situation
Comment
Proposed
Situation VSC
Proposed VSC as a %
of Existing Situation
Comment
1 38.74 38.07 98% ✓ 37.37 96% ✓ 38.84 100% ✓ 35.97 93% ✓
2 37.74 37.11 98% ✓ 35.92 95% ✓ 38.02 101% ✓ 35.23 93% ✓
3 38.79 37.95 98% ✓ 36.13 93% ✓ 38.86 100% ✓ 35.27 91% ✓
4 37.77 37.05 98% ✓ 33.97 90% ✓ 37.93 100% ✓ 34.76 92% ✓
5 32.68 32.50 99% ✓ 31.79 97% ✓ 32.75 100% ✓ 28.29 87% ✓
6 37.36 35.41 95% ✓ 36.01 96% ✓ 37.43 100% ✓ 30.03 80% ✓
7 38.15 36.53 96% ✓ 37.54 98% ✓ 38.1 100% ✓ 31.97 84% ✓
8 37.11 35.69 96% ✓ 36.62 99% ✓ 37.24 100% ✓ 31.15 84% ✓
9 34.39 33.96 99% ✓ 31.98 93% ✓ 34.76 101% ✓ 32.73 95% ✓
10 31.05 31.15 100% ✓ 29.18 94% ✓ 31.47 101% ✓ 29.57 95% ✓
11 27.8 28.01 101% ✓ 25.77 93% ✓ 28.99 104% ✓ 27.09 97% ✓
12 24.86 25.35 102% ✓ 22.85 92% ✓ 26.03 105% ✓ 24.40 98% ✓
13 22.4 22.56 101% ✓ 20.62 92% ✓ 23.32 104% ✓ 21.77 97% ✓
14 35.45 35.08 99% ✓ 30.82 87% ✓ 35.94 101% ✓ 33.53 95% ✓
15 32.52 32.67 100% ✓ 27.74 85% ✓ 33.41 103% ✓ 31.15 96% ✓
16 29.52 30.00 102% ✓ 25.43 86% ✓ 30.75 104% ✓ 28.94 98% ✓
17 26.99 26.87 100% ✓ 22.72 84% ✓ 28.27 105% ✓ 26.16 97% ✓
18 24.17 24.12 100% ✓ 20.24 84% ✓ 25.85 107% ✓ 22.69 94% ✓
19 35.01 35.29 101% ✓ 26.25 75% x 36.09 103% ✓ 33.03 94% ✓
20 32.19 33.43 104% ✓ 23.53 73% x 33.44 104% ✓ 31.35 97% ✓
21 29.15 29.16 100% ✓ 21.13 72% x 31.22 107% ✓ 29.08 100% ✓
22 26.07 24.69 95% ✓ 19.46 75% x 28.26 108% ✓ 24.14 93% ✓
23 23.35 21.53 92% ✓ 17.33 74% x 25.27 108% ✓ 19.78 85% ✓
24 17.75 14.98 84% ✓ 16.29 92% ✓ 16.72 94% ✓ 11.58 65% x
25 17.62 14.89 85% ✓ 16.51 94% ✓ 16.91 96% ✓ 11.88 67% x
26 16.59 13.53 82% ✓ 14.79 89% ✓ 15.53 94% ✓ 11.43 69% x
27 14.65 12.64 86% ✓ 13.49 92% ✓ 13.9 95% ✓ 10.36 71% x
28 13.8 11.38 82% ✓ 12.74 92% ✓ 13.05 95% ✓ 10.35 75% x
29 13.38 11.36 85% ✓ 13.21 99% ✓ 13.08 98% ✓ 10.39 78% x
30 36.62 34.25 94% ✓ 35.75 98% ✓ 36.46 100% ✓ 29.74 81% ✓
31 35.64 33.14 93% ✓ 34.49 97% ✓ 33.53 94% ✓ 28.91 81% ✓
32 34.2 31.59 92% ✓ 32.85 96% ✓ 32.22 94% ✓ 28.04 82% ✓
33 32.25 30.21 94% ✓ 31.03 96% ✓ 32.22 100% ✓ 26.71 83% ✓
34 30.81 28.68 93% ✓ 29.54 96% ✓ 30.6 99% ✓ 25.37 82% ✓
35 14.25 12.20 86% ✓ 14.00 98% ✓ 13.82 97% ✓ 11.36 80% ✓

52. Daylight to Existing Buildings
Building 4
WhencomparedtotheExistingSituation,forthetestedpointsinBuilding4,theno.ofpointsthatare
inlinewiththerecommendedvaluesassetoutintheBREGuidelines:
−Option1:100%(35outof35points)
−Option2:86%(30outof35points)
−Option2a:100%(35outof35points)
−Option3:83%(29outof35points)
Massing Option 1 Massing Option 2 Massing Option 2a
Compliant
NonCompliant
Massing Option 3
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53. Daylight to Existing Buildings
Building 4 –Reference Image
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54. Sunlight to Existing Buildings
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✓/✓
Both the Proposed Scheme annual and
winter APSH results are greater than 25%
and 5% respectively, or are greater than
0.8 times their former value or are less
than 4% overall annual loss with the
proposed development in place.
✓/X
The annual APSH results are greater
than 25% or are greater than 0.8 times
their former value with the proposed
development in place, however, the
winter results are below the guidelines.
X/✓
The annual APSH results are less than
the recommended values, however, the
winter APSH results are greater than 5%
or greater than 0.8 times their former
value with the proposed development in
place.
X/X
Both the annual and winter APSH results
are less than 25% and 5% respectively,
and less than 0.8 times their former
value or are greater than 4% overall
annual loss with the proposed
development in place.
Ref:
Existing Situation Massing Option 1 Massing Option 2 Massing Option 2a Massing Option 3
Annual Winter Annual Winter
Proposed
APSH
as a % of
Existing
(Annual)
Proposed
APSH
as a % of
Existing
(Winter)
Comment Annual Winter
Proposed
APSH
as a % of
Existing
(Annual)
Proposed
APSH
as a % of
Existing
(Winter)
Comment Annual Winter
Proposed
APSH
as a % of
Existing
(Annual)
Proposed
APSH
as a % of
Existing
(Winter)
Comment Annual Winter
Proposed
APSH
as a % of
Existing
(Annual)
Proposed
APSH
as a % of
Existing
(Winter)
Comment
1 74.12 33.44 72.42 31.28 98% 94% ✓/✓ 72.57 31.63 98% 95% ✓/✓ 74.12 33.44 100% 100% ✓/✓ 65.09 26.20 88% 78% ✓/✓
2 72.2 31.23 68.94 27.92 95% 89% ✓/✓ 67.46 26.36 93% 84% ✓/✓ 72.32 31.23 100% 100% ✓/✓ 63.30 23.30 88% 75% ✓/✓
3 74.64 33.66 72.04 31.07 97% 92% ✓/✓ 70.77 29.80 95% 89% ✓/✓ 74.64 33.66 100% 100% ✓/✓ 64.90 26.03 87% 77% ✓/✓
4 72.1 31.78 68.78 28.46 95% 90% ✓/✓ 64.82 24.50 90% 77% ✓/✓ 72.11 31.78 100% 100% ✓/✓ 61.83 24.29 86% 76% ✓/✓
5 54.6 26.03 51.99 23.41 95% 90% ✓/✓ 50.56 20.78 93% 80% ✓/✓ 54.6 26.03 100% 100% ✓/✓ 44.73 18.64 82% 72% ✓/✓
6 59.86 27.07 57.48 24.69 96% 91% ✓/✓ 53.59 20.80 90% 77% ✓/✓ 59.86 27.07 100% 100% ✓/✓ 49.44 19.43 83% 72% ✓/✓
7 61.65 28.47 60.26 27.08 98% 95% ✓/✓ 59.75 26.57 97% 93% ✓/✓ 61.65 28.47 100% 100% ✓/✓ 51.21 19.96 83% 70% ✓/✓
8 59.82 27.73 58.27 26.18 97% 94% ✓/✓ 55.43 23.34 93% 84% ✓/✓ 59.82 27.73 100% 100% ✓/✓ 49.20 18.69 82% 67% ✓/✓
9 65.77 25.86 61.75 21.88 94% 85% ✓/✓ 58.80 18.93 89% 73% ✓/✓ 65.53 25.66 100% 99% ✓/✓ 57.23 19.45 87% 75% ✓/✓
10 60.44 21.87 56.62 18.07 94% 83% ✓/✓ 52.77 14.23 87% 65% ✓/✓ 60.33 21.79 100% 100% ✓/✓ 53.40 16.94 88% 77% ✓/✓
11 55.16 18.59 53.00 16.47 96% 89% ✓/✓ 49.50 13.41 90% 72% ✓/✓ 55.89 19.36 101% 104% ✓/✓ 50.64 16.19 92% 87% ✓/✓
12 48.55 15.34 47.77 14.59 98% 95% ✓/✓ 44.24 12.42 91% 81% ✓/✓ 50.74 17.56 105% 114% ✓/✓ 46.07 14.98 95% 98% ✓/✓
13 42.82 12.54 43.20 12.93 101% 103% ✓/✓ 39.12 11.36 91% 91% ✓/✓ 46.27 16.01 108% 128% ✓/✓ 40.22 12.04 94% 96% ✓/✓
14 68.39 28.66 65.33 25.63 96% 89% ✓/✓ 57.61 17.92 84% 63% ✓/✓ 68.46 28.76 100% 100% ✓/✓ 58.80 21.65 86% 76% ✓/✓
15 62.03 24.38 59.99 22.36 97% 92% ✓/✓ 52.14 15.70 84% 64% ✓/✓ 62.98 25.35 102% 104% ✓/✓ 54.37 19.93 88% 82% ✓/✓
16 57.44 21.84 54.55 16.97 95% 77% ✓/✓ 47.74 14.16 83% 65% ✓/✓ 57.86 22.27 101% 102% ✓/✓ 51.13 19.02 89% 87% ✓/✓
17 51.5 17.98 48.89 15.40 95% 86% ✓/✓ 43.19 13.03 84% 72% ✓/✓ 52.28 18.79 102% 105% ✓/✓ 44.71 14.69 87% 82% ✓/✓
18 44.6 13.45 43.52 12.39 98% 92% ✓/✓ 38.74 11.68 87% 87% ✓/✓ 47.46 16.32 106% 121% ✓/✓ 38.22 10.56 86% 79% ✓/✓
19 67 27.61 64.95 25.57 97% 93% ✓/✓ 51.75 14.71 77% 53% ✓/✓ 69.26 29.88 103% 108% ✓/✓ 57.68 21.81 86% 79% ✓/✓
20 62.03 23.9 61.67 23.54 99% 98% ✓/✓ 47.21 13.38 76% 56% ✓/✓ 64.03 25.9 103% 108% ✓/✓ 56.36 21.73 91% 91% ✓/✓
21 55.39 19.64 51.40 15.66 93% 80% ✓/✓ 39.64 10.53 72% 54% ✓/✓ 56.47 20.73 102% 106% ✓/✓ 50.40 18.69 91% 95% ✓/✓
22 46.5 12.95 43.36 9.95 93% 77% ✓/✓ 34.37 8.38 74% 65% ✓/✓ 48.59 15 104% 116% ✓/✓ 38.46 9.78 83% 76% ✓/✓
23 42.28 11.32 37.94 7.78 90% 69% ✓/✓ 30.40 8.35 72% 74% ✓/✓ 42.59 11.61 101% 103% ✓/✓ 30.93 5.93 73% 52% ✓/✓
24 24.09 13.38 19.41 8.70 81% 65% ✓/✓ 23.17 12.46 96% 93% ✓/✓ 24.09 13.38 100% 100% ✓/✓ 15.53 5.90 64% 44% x/✓
25 24.49 13.06 18.87 7.44 77% 57% x/x 22.02 10.59 90% 81% ✓/✓ 22.69 11.25 93% 86% ✓/✓ 15.87 5.65 65% 43% x/✓
26 22.56 11.13 17.03 5.60 75% 50% x/x 19.76 8.32 88% 75% ✓/✓ 19.96 8.53 88% 77% ✓/✓ 14.26 4.04 63% 36% x/x
27 18.71 7.6 14.80 3.70 79% 49% x/x 17.07 5.97 91% 79% ✓/✓ 18.33 7.23 98% 95% ✓/✓ 13.10 3.21 70% 42% x/x
28 16.28 5.29 13.03 2.04 80% 39% x/x 15.48 4.49 95% 85% ✓/✓ 16.53 5.54 102% 105% ✓/✓ 11.98 2.20 74% 42% x/x
29 16.4 3.8 14.48 1.88 88% 49% x/x 15.98 3.39 97% 89% ✓/✓ 16.62 4.11 101% 108% ✓/✓ 13.00 1.57 79% 41% x/x
30 57.86 25.75 53.96 21.87 93% 85% ✓/✓ 52.40 20.31 91% 79% ✓/✓ 58.42 26.39 101% 102% ✓/✓ 45.96 17.33 79% 67% ✓/✓
31 55.64 23.57 51.99 20.05 93% 85% ✓/✓ 50.63 18.69 91% 79% ✓/✓ 56.42 24.47 101% 104% ✓/✓ 45.33 16.84 81% 71% ✓/✓
32 52.04 21.5 47.62 15.83 92% 74% ✓/✓ 47.06 15.97 90% 74% ✓/✓ 51.07 19.79 98% 92% ✓/✓ 44.27 15.94 85% 74% ✓/✓
33 48.21 18.15 41.03 11.17 85% 62% ✓/✓ 41.41 12.47 86% 69% ✓/✓ 44.19 15.22 92% 84% ✓/✓ 39.28 13.57 81% 75% ✓/✓
34 41.27 11.65 37.49 8.03 91% 69% ✓/✓ 38.00 10.22 92% 88% ✓/✓ 41.39 12.23 100% 105% ✓/✓ 33.75 8.38 82% 72% ✓/✓
35 17.91 6.36 15.11 3.03 84% 48% ✓/ x 18.12 6.29 101% 99% ✓/✓ 17.26 5.19 96% 82% ✓/✓ 14.23 2.99 79% 47% ✓/ x

55. Sunlight to Existing Buildings
Building 4
WhencomparedtotheExistingSituation,forBuilding4,ofthe35no.testedpoints,theno.ofpointsthat
meettheBRErecommendation:
−Option1:29no.(83%)
−Option2:35no.(100%)
TheseresultshighlightthatOptions2and2ahavetheleastimpacttothesunlightreceivedonBuilding4.
Massing Option 1 Massing Option 2 Massing Option 2a
CompliantNonCompliant
Massing Option 3
−Option2a:35no.(100%)
−Option3:28no.(80%)
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56. Impact on Apartment Design
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—Room Depth/Layout
—% Glazing
—Balcony Design
—Depth/Area
—Location
—Finishes
—Internal
—External

57. Impact on Apartment Design
1 2
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58. Impact on Apartment Design
2
2
1
1
Option 1
−LKD recessed under balcony
Option 2
−Bedroom recessed under balcony
−Storage & WC placed at back of the
apartment
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59. Impact on Apartment Design
Option 1
−Full width balcony
Option 2
−Reduced balcony area to minimum
requirements
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1
2

60. www.iesve.com
—Interoperability:
—Revit, SketchUp, Rhino
—gbXML, Pollination (.GEM)
—Daylight & Sunlight Studies:
—Why & When –Standards & Guidance
—IESVE Sunlight & Daylight
—Case Study: Multi-Residential Apartment Block
What we covered?

61. IES Consulting
Services
www.iesve.com
BIM Masterplanning Design Building Regs CFD Studies
LEED BREEAM Mentoring Bid Support
In Use /
Operation

62. IESVE Training
www.iesve.com/training/online-training
www.iesve.com

63. Achieving Excellence with IESVE
Webinar Series
www.iesve.com
—Session 1: Keep Your Cool with the Building Regulations -Part O
—go.iesve.com/achieving-excellence-webinar-building-regulations-part-o/eshot
—Session 2: M&V for Building Performance
—go.iesve.com/achieving-excellence-webinar-m-and-v-for-building-performance/eshot
—Session 3: IESVE for HVAC Simulation
—go.iesve.com/achieving-excellence-webinar-iesve-for-hvac-simulation/eshot

64. Thank you
Any Questions?
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