For an air conditioning installation technician sizing a unit for your home is a big job. HVAC techs are trained in how to calculate the energy efficiency of a home based on things like the number of windows, solar exposure, age, and type of insulation. All of these factors go into determining the most appropriately-sized unit for your home. Units that are improperly sized will run for too long, causing high bills, or they will short-cycle and allow humidity to build up in the house and be uncomfortable. Sharing this type of information with our installers will help them more accurately size your system.