Air conditioning
Size a room air conditioner from ENERGY STAR's table, and learn why no square-footage rule can size central air.
Guides and calculators
Air conditioning
Room Air Conditioner Size Calculator
Find a room air conditioner's capacity using ENERGY STAR's table and its adjustments for sun, occupants and kitchens, with the order of the math disclosed.
Air conditioningWhat Size AC for My House? Why No Square-Footage Rule Can Tell You
No square-footage rule can size central air. See what the code requires, how far real load calculations vary, and what to ask for and check in a quote.