An air handler houses the evaporator coil, blower and electric heating strips all in one cabinet. During the cooling mode of the Air Conditioning system, a fan draws warm air from inside the home through a filter and the air handler and then over the evaporator coil. As the air passes over the coil, much of the moisture the air possesses is condensed and runs off into a drip pan where it is drained away through the drain lines. This process occurs because as the warm air passes over the coil, it is quickly cooled and can no longer hold the same amount of moisture as it did when it was warm. The refrigerant inside the evaporator coil enters as a liquid and once the warm, filtered air is passed over it, the temperature of the air is lowered. From here, the refrigerant carries the warm air as a gas to the outside compressor where the vapor is compressed and passed through the condenser’s coil. This process is much the same as what happens to a glass of cold water on a hot and humid day.
The air handler then uses a fan to circulate cooled air to the rooms of the house. The blower propels both the heated and cooled air by use of a fan. This fan and blower capacity is extremely important to the operation of the system as is the type and design of the ductwork.
Stronger capacity air handlers can often times overcome restrictions in the ductwork.
The difference in air handlers is generally the blower capacity and speed. Along the gulf coast we size the air handler by its blower capabilities for cooling performance. Heating is actually a secondary consideration. We prefer an air handler with variable speed blower technology because we can precisely set the airflow for maximum cooling performance and enhanced cooling humidity control in both single stage cooling and variable speed/inverter technology.
A standard multi speed blower will only allow us to get in range for perspective cooling tonnage the variable speed is much more versatile a welcome industry improvement.
The variable speed air handler offers precise control of the airflow in all modes to properly cool, heat, and dehumidify the home.
If you are having trouble with your heating or cooling system, click the button below to take a look at this list of simple, safe do-it-yourself diagnostic procedures.