What size furnace for 800 Sq Ft House in Ohio?

For an 800 sq ft house in Ohio, a furnace with an output of about 40,000 to 60,000 BTUs is typically recommended, depending on factors such as insulation quality, ceiling height, and local climate. It's important to perform a heat load calculation to account for these variables for optimal efficiency. Consulting with a local HVAC professional can ensure you choose the right size for your specific needs.