Australia National Construction Code 2022 Volume Two (Building Code of Australia, Class 1 and 10 Buildings) H6P1: H6P1 Thermal performance

For the habitable rooms and conditioned spaces taken together, the heating load, cooling load and overall thermal energy load are each capped at the limit Specification 44 produces. Verification Methods: H6V2 compares the proposed building with a reference building built to Housing Provisions Parts 13.2, 13.3 and 13.5, using a non-rating calculation method compliant with ANSI/ASHRAE Standard 140 with identical inputs (location climate data, orientation, floor plan, schedules, thermostat settings of 24 degrees C cooling in bedrooms, 27 or 26 degrees C in other habitable rooms by climate zone and 20 degrees C heating, occupancy gains of 75 W and 105 W per person, 450 W appliance and 4 W/m2 lighting gains, 0.75 air changes per hour or a verified sealed rate), and the proposed building must also meet the insulation, thermal break, floor edge insulation and sealing clauses; H6V3 verifies envelope sealing where measured air leakage is 10 m3/hr.m2 or less at 50 Pa to AS/NZS ISO 9972 Method 1, and below 5 requires mechanical ventilation with outdoor air (manual override, a minimum flow formula, and ventilation for solid-fuel and gas appliances). Deemed-to-Satisfy route (H6D2(1)): either an energy rating from house energy rating software under Specification 42 (at least 7 stars with the separate heating and cooling load limits of the ABCB Standard for NatHERS Heating and Cooling Load Limits, or 6.5 or 6 stars in climate zones 1 and 2 where a qualifying roofed outdoor living area of at least 12 m2, and for 6 stars a ceiling fan, is provided) plus S42C4(1) (insulation clause 13.2.2, thermal breaks, compensation for loss of ceiling insulation, floor edge insulation and building sealing Part 13.4), or the elemental provisions of Housing Provisions Parts 13.2 building fabric, 13.3 external glazing and shading, 13.4 building sealing and 13.5 ceiling fans.