Best propane furnaces for a 2100 square foot house
Researched by Deal.ai's shopping agent across stores on November 7, 2026. Prices below are today's.
Top pick: a 66,000 BTU modulating, 98% AFUE furnace. For 2,100 sq ft in a cold climate you want roughly 60,000–80,000 BTU of input, and a modulating, variable-speed unit holds temperature evenly and sips fuel. This one is rated for natural gas or propane, so it works on your tank without a conversion kit.
Who the others suit:
- 88,000 BTU modulating, 97% — a bigger, colder-climate house or a drafty, poorly insulated one.
- 80,000 BTU two-stage, 80% — a budget install where venting is simple; less efficient, noisier cycling.
- Goodman 80,000 BTU, 96% — you want a widely serviced brand name and a single-speed blower is fine.
- 110,000 BTU modulating, 97% — only if a load calculation says you need it; oversized furnaces short-cycle.
Whatever you pick, have a contractor run a Manual J load calc and confirm the propane conversion kit and venting before ordering.
The picks
- #1
