What should I sell them?

Where is the home?

🌡️ Coldest design night here: about 4°F. We size to keep them warm even then.

How big is the home?

A rough number is fine. We estimate the rest.

What heats it now?

Does it have ductwork?

🌀 Ducted: one hidden air handler reuses the existing vents.

Why are they looking?