Heat pump guides
Read the certified figures, compare the right pairing, and understand the limits of a sizing estimate.
Reading a heat pump's ratings
From the methodology
Using the figures
The quote check compares the models on a quote with the certified pairing. The size calculator gives a heating-load range for your home's area and condition. A contractor's room-by-room load calculation is still needed to select equipment.
The capacity study shows how certified cold-weather output varies across units.