# IEQ 3.2 Thermal Comfort - External Shading
# Applies to
Single dwellings, extensions and Multi-dwelling (dual occupancy, townhouse, villa unit etc)
# Objective
To provide comfortable indoor spaces and reduce energy needed for heating and cooling
# Summary
Points are awarded where appropriate external shading is provided to all east, west and north facing habitable room windows.
# Documentation & evidence required
- Reference to floor plans and elevations showing shading devices.
# Other Considerations
Fixed external shading to north facing glazing, such as overhanging eaves, can reduce excessive heat gain in summer while allowing warming winter sun to reach the glazing. As a rule of thumb eaves width should measure 25% of the height from the window sill and the bottom of the eaves. Note that this rule of thumb now aligns with the latest Energy Smart Housing Manual.
A variety of shading options are suitable for east and west facing glazing, including verticle shading structures such as adjustable louvres, as well as sliding screens, pergolas and roof overhangs, awnings and verandas.
A preliminary building energy rating (NatHERS / FirstRate5 assessment) will help you optimise your design for passive heating and cooling.