What role does refrigerant play in HVAC systems?

Refrigerant plays a crucial role in HVAC (Heating, Ventilation, and Air Conditioning) systems by absorbing heat from the indoor air and releasing it outside, thereby facilitating temperature control. When the refrigerant evaporates inside the evaporator coil, it absorbs heat from the surrounding air, which cools the air before it is distributed back into the indoor space. This process is fundamental to the cooling cycle of air conditioning systems.

As the refrigerant flows through the system, it is continuously cycled back and forth between the evaporator and condenser coils. After absorbing heat indoors, the refrigerant is compressed and sent to the condenser coil, where it releases the absorbed heat to the outside air. This cycle allows HVAC systems to maintain a comfortable indoor temperature regardless of the external weather conditions.

While other factors like air pressure, circulation, and filtration are essential for the overall operation of an HVAC system, they do not directly involve the refrigerant's primary function of heat absorption and temperature control.