HVAC Coils: Repair & Replacement
AC Systems don’t create cold air, instead they transfer heat from indoors to the outdoors. Refrigerant cycles through the coils to facilitate this transition of heat. Thus, manufacturers typically use aluminum and copper to construct them, with copper tubing looped through thin sheets of closely spaced aluminum to increase the surface area for air to pass over. Furthermore, these are classified in two different types: evaporator and condenser.
What are Evaporator Coils?
- Evaporator coils are inside the indoor AC unit. The blower wheel or blower fan blows air over the evaporator coil, which in turn absorbs the heat from the air. The refrigerant absorbs the heat and transports it to your outside AC unit, where it disperses. The transfer of heat to the evaporator also causes water vapor in the air to condensate, providing a dehumidifying effect. Keeping the evaporator coil clean is important! Because when an evaporator coil is dirty, it leads to the following:
- -Your energy bills are abnormally high, a dirty evaporator coil causes the system to work more often as it can no longer transfer heat efficiently.
- -Ice can form on the evaporator coil, causing the AC compressor to work harder and potentially cause component failures.
Condensers
Condenser coils reside in your outside AC unit, referred to as a condenser unit. Refrigerant from your evaporator coil is pumped outside to the condenser coil. The fan in the condenser unit blows air over the condenser coil cooling the refrigerant inside. The cooled refrigerant then is pumped back inside and then the process repeats. As part of this heat exchange process, the refrigerant changes states from a gas to a liquid and back to a gas. The liquid refrigerant in the evaporator is pumped through an expansion valve which causes the refrigerant to cool down. The liquid refrigerant passes through the evaporator, heats up then turns into a gas. The gas then flows into the condenser coil, where it condenses back into a liquid. Condenser coils, not unlike evaporator coils, play a crucial role and require regular cleaning to ensure efficient operation
Do you need a Service or Repair?
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