Manual J Required: Why Rule-of-Thumb HVAC Sizing No Longer Cuts It

Manual J Required: Why Rule-of-Thumb HVAC Sizing No Longer Cuts It

Manual J Required: Why “Rule-of-Thumb” Sizing Is Yesterday’s News Picture a blazing July afternoon in Rockford, Illinois. Maya Garcia is on her third glass of iced tea, yet the upstairs nursery still feels like a sauna. Her brand-new 3-ton air-conditioner keeps...