 Approved software for residential heating and cooling loads
As of June 30, 2025, Residential Manual J load calculations required for sizing heating and cooling equipment for single family, duplex, and Denver Residential Code townhome projects must use a software approved by ACCA.
Residential Manual J load calculations are required for accurately sizing heating and cooling equipment in new construction and when replacing existing systems. These calculations determine the precise heating and cooling needs of a building, ensuring the HVAC system is neither too large nor too small. This method, developed by the Air Conditioning Contractors of America (ACCA), takes into account various factors to accurately assess heat gain and loss. |
