How Do You Size Heating & Cooling Systems?
Oversizing heating or cooling units can cause inefficient operation in additional to unnecessary installation and repair expenses. It may also make your home feel uncomfortable and encourage moisture problems. Since new and replacement systems should conform to the “Manual J: Residential Load Calculation” published by the Air Conditioning Contractors of America (ACCA), knowing how to make sure your contractor sizes the right system for your home is imperative. Find a reputable local heat and air contractor. Get several references from friends and relatives as well as local licensing boards. When you contact them, ask for additional references before hiring. Watch and/or help the contractor measure your interior space. This will include measuring thing such as the wall and ceiling heights, square footage of the rooms, etc. He may also ask about the R-value of any insulation or special weatherization items that have been installed in the home. Have the contractor perform a “blower test,”
