HVAC maintenance and insulation impact cooling efficiency

Inefficient air conditioning performance and rising energy bills are often caused by poor heat transfer rather than equipment failure. A primary culprit is the buildup of dust, pet hair, and grime on HVAC coils. Even a thin layer of dirt on outdoor coils can reduce cooling efficiency by more than 20%, forcing the compressor to work harder and run longer to reach set temperatures.

Beyond coil maintenance, home insulation plays a critical role in cooling capacity. According to ENERGY STAR, 9 out of 10 U.S. homes are under-insulated. Addressing leaks in the home envelope, such as attic insulation or air leaks around windows, is often more cost-effective than replacing hardware.

Research from Lawrence Berkeley National Laboratory indicates that fouled evaporator coils can double a system’s air pressure drop within 7 to 11 years of normal use, significantly impacting the refrigeration cycle and increasing electricity consumption.