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www.inhabitgroup.com
Are We Ignoring True Façade Performance In Singapore?
BUILDING PHYSICS/ SUSTAINABLE DESIGN TEAM
JESSICA HOGGAssociate
GEORGE COUTTSSenior Building Physics/ Mechanical Services Engineer
James Von DinklageBuilding Physics Engineer
SAMANTHA ANDERSONSenior Building Physics/ Renewable Energy Engineer
SOPHIA KEESenior Sustainable Design Consultant
DAVID CARROLBuilding Physics Engineer/ Software Developer
DARREN O’DEAPrincipal
DENNIS CHANGBuilding Physics/ Façade Engineer
Shading Optimisation
Rating Tools (Green Mark, LEED, Green Star, etc)
Condensation Risk
Energy Modelling
Daylight Design
Visual and Thermal Comfort
Thermal Fracture
Thermal Performance
Passive House
Wind Studies
SENSE - BUILDING PHYSICS + SUSTAINABLE DESIGN SERVICES
Shading Optimisation
Rating Tools (Green Mark, LEED, Green Star, etc)
Condensation Risk
Energy Modelling
Daylight Design
Visual and Thermal Comfort
Thermal Fracture
Thermal Performance
Passive House
Wind Studies
SENSE - BUILDING PHYSICS + SUSTAINABLE DESIGN SERVICES
Optical ThermalAesthetic
Structural Sealed
ETTV = 12(1 WWR) Uw + 3.4(WWR) Uf + 211(WWR) (CF) (SC)
ETTV : envelope thermal transfer value (W/m2 ) WWR : window-to-wall ratio (fenestration area / gross area of exterior wall) Uw : thermal transmittance of opaque wall (W/m2.K) Uf : thermal transmittance of fenestration (W/m2.K) CF : correction factor for solar heat gain through fenestration SC : shading coefficients of fenestration
+ +Aluminium205 - 250 W/m K
Steel46 - 50 W/m K
Glass0.8 - 1 W/m K
Assumptions: 75% glazing, 0.25 Shading Coefficient, 1.9 W/m²K Vision U-value, 0.7 W/m²K Spandrel U-value
UgAg + UgsAgs + UfAf + UedgeAedge
Usystem
TYPICAL SPANDREL DETAIL
TYPICAL VISION DETAIL
TRANSOM DETAIL
UF 15.7W/m²K UE 2.5 W/m²K
NFRC 100 Ext Summer Conditions:
. Air: 32.0 °C
. Direct solar: 783 W/m²
. Wind Speed: 2.75 m/s
NFRC 100 Int Summer Conditions:
. Air: 24.0 °C
TRANSOM DETAIL
UF 13.6 W/m²K UE 2.1W/m²K
VISION MULLION DETAIL
UF 16 W/m²K UE 2.5 W/m²K
MULLION SPAN DETAIL
UF 6.0 W/m²K UE 2.0 W/m²K
USG 0.7 W/m²K
UG 1.9 W/m²K
UF 6.0 W/m²K UE 2.0 W/m²K
UF 13.6 W/m²K UE 2.1 W/m²K
UF 16 W/m²K UE 2.5 W/m²K
UF 15.7 W/m²K UE 2.5 W/m²K
Edge LossesFrame LossesCentre Pane Losses
3.4 W/m²K
3.3 W/m²K
VISION (U1.9)
SPANDREL (U0.7)
Center System Center SystemGlass Spandrel
0
50
100
150
200
250
300
Heat
Tra
nsm
issio
n (k
Wh/
annu
m)
WITHOUT FRAMES INCLUDING FRAMES
• A high performance façade design is meaningless without inclusion of the frame
• Thermally improving your façade is not only a cold climate strategy
• Request further guidance from the BCA
• Access ETTV Façade Designer for free on the Inhabit Website
HIGH PERFORMANCE FACADES FOR THE TROPICS – THE NEXT DECADE
Level 3, Begonia 3001A – 3102
FAÇADE | ADVANCED STRUCTURES | BOUTIQUE FAÇADES & STRUCTURES | ESD | BUILDING PHYSICS | ACOUTICS | LIGHTING | ACCESS & MAINTENANCE | LOGISTICS
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