How do I determine the correct Furnace size (BTUs) for my home?

We recommend checking the BTU listed on your current system’s data sticker, usually found on the furnace inside the cabinet door or on the inner or outer wall of the cabinet. Look for terms like “Model Number” or “M/N.” These details help identify BTU/tonnage and find a suitable replacement. For new construction, consult a contractor or perform a load calculation to ensure proper sizing and efficiency.