1300 sq foot home what size furnace do you need?

it depends on how tight is ur home if it is well sealed you can size down if not ur going to want to size up on ur furnace usually a house that size is going to use a 65,000 or 70,000 btu furnace. other stuff you want to look at is ur house a 2 story or 1, does it have a basement, drafty entry way, how many Windows, is ur duck work sized properly meaning each room has a cfm, for sizeing registers its 120cfm per register. if you acually do the math it runs to about 58,200 btu furnace by HVACbuddy