5. Multifamily Title 24
Starting in EnergyPro 9.0 you will find three TDV scores when doing a compliance calculation. A TDVe score which represents the efficiency of the building design and includes all end uses with the exception of PV and Battery. A TDVt score which is the building efficiency score including the savings contribution of PV and Batteries, and a Sourcet score, a Source emissions score that is similar to the TDVt score and includes all end uses and factors in the Green House Gas emissions that result from the gas and electricity that is consumed to run the building. In the case of buildings with gas appliances, you can expect your proposed Sourcet emissions score to be high. For the 2022 Energy Code, New Construction projects are required to comply with all three scores.
You can review two sample files we provide, the Multifamily Example.bld, we also provide a file Multfamily Electric.bld Both are modeled at the Plant level of the tree, Domestic Hot Water tab. The inputs for the CHPWH are at the bottom section of the input screen, you can choose the type of Heat Pump, quantities, etc, as well as tank volumes, and supplemental loop capacities, tank locations and locations of condensers. The water heater input at the top of the screen is used to supply Nonresidential spaces. You CANNOT assign those spaces to the CHPWH, CBECC does not allow for that circumstance, so you will have to assign those spaces to a standalone WH. Create a dummy electric WH if necessary.
These occupancies are listed as exempt lighting under Section 140.6 of the code, and as such the lighting does not appear on the reports, nor does it affect any calculated results. Basically the lighting is subject to mandatory measures, but the quantity of lighting is unregulated and thus not reported.