Famous Gas Furnace Cost Calculator Ideas. At the top of the. Web let's say you need to heat an area of 2,000 square feet.

New gas furnace prices are $800 to $2,700 for the unit plus $900 to $3,000 for the install labor. Web furnace unit cost* gas / propane furnace: Web let's say you need to heat an area of 2,000 square feet.