When undertaking a Performance Solution Verification Pathway such as a JV3 Verification using a reference building, annual greenhouse gas emissions are determined for a Reference Building with Deemed-to-Satisfy Provisions and a Proposed Building for the proposed specification of the design.
Under Section B of JV3 Verification using a reference building, it is stated that a Proposed Building may be offset by the application of renewable energy that is generated and used on-site and any other process such as reclaimed and energy that is also used on site.
“(b) The annual greenhouse gas emissions of the proposed building may be offset by—
(i) renewable energy generated and used on-site; and
(ii) another process such as reclaimed energy, used on site.”
In practice, this trading off is likely to occur at the fabric of the building where renewables might be perceived to allow for a more economic facade strategy.
While acceptable under the NCC 2019 – Vol 1 2019, this strategy would need to ensure that the additional requirements of thermal comfort are also met which are very onerous for some building types and climates.
“(i) in the proposed building, a thermal comfort level of between a Predicted Mean Vote of -1 to +1 is achieved across not less than 95% of the floor area of all occupied zones for not less than 98% of the annual hours of operation of the building.”