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 1: An Introduction to Air Source Heat Pumps
Air source heat pumps are a renewable energy technology that absorb heat from the outside air and transfer it into...
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...
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...