What brand of furnace offers the best warranty?

There is no significant difference between the major furnace manufacturer's in terms of warranty coverage or reliability, as of 2015. In its survey of heating brands, Consumer Reports finds that premium products carry longer warranties than less expensive models from the same brand, but this difference is consistent across manufacturers.

Furnaces may also be warrantied by the company or independent contractor who installs the unit, dealers and retailers, third-party warranty companies and home warranties obtained upon purchasing a home. Manufacturer's warranties on included appliances such as furnaces are transferable with the sale of the home, and so are some dealer and installer warranties.