Many people would like to know what we inspect when we inspect a central air conditioning unit. The first thing we look for is if the unit is sized correctly for the amount of sq. footage of the house. Every 650 sq. ft of house needs approximately a ton of cooling as it takes more energy to cool a house. A 2500 sq. ft. property will need approximately 4 tons of cooling capacity. 

The primary function of a cooling system is to first dehumidify, then to condition the air. If the unit is not properly sized for property conditions, cooler ductwork will cause water to condense and stain the ceiling. We look for clues to see if the unit is working properly:

• We will take several temperature readings at the supply registers;
• We will take note of the compressor size in comparison to area served;
• We will note if the HVAC system is servicing 2 levels;
• Are there thermostats on both levels being serviced;
• Are there return air grills on each level being serviced;
• We will note the temperature conditions on both levels - Supply temperature in relation to return air temperatures;
• We will note the humidity levels on both levels;
• We will note if water stains are present under service runs or around system registers especially in basement homes.

By taking all of these factors into consideration, we can make an educated guess as to the system’s performance. If we see water stains, undersized units or inconsistent temperatures, we generally call for a professional to further evaluate the unit.