Split-level homes: which spaces belong in the volume calculation?
Before comparing airtightness results or planning heating equipment, reconcile the included spaces, air volume and exterior surfaces. A worked, explicitly...
Part 3: Reading heat-pump efficiency and capacity ratings
Capacity, efficiency and seasonal ratings answer different questions. Use them together with the home’s heat loss and the exact matched...
Part 2: Choosing, Installing, Maintaining, and Operating Air Source Heat Pumps
Cold climate air source heat pumps (CCAHPs) are a specialized type of air source heat pump that operates efficiently in...
Why a whole-house heating load is not a room-by-room heating plan
Trace the heating load from the building to each room and the equipment serving it. A transparent wall-and-window example shows...