What are the four main components of an HVAC system?

The four main components of an HVAC (Heating, Ventilation, and Air Conditioning) system are indeed the heater, air conditioner, ventilation system, and thermostat.

The heater provides the necessary warmth during cold weather, functioning in various forms such as furnaces or boilers. The air conditioner is critical for cooling indoor spaces during hot weather, allowing for temperature control and comfort. The ventilation system circulates air within a building, ensuring fresh air intake and the removal of stale air, which is essential for maintaining indoor air quality. Finally, the thermostat acts as the control center, allowing users to set and maintain the desired temperature, regulating the operational states of both the heater and air conditioner based on the environmental conditions.

This combination of components ensures that an HVAC system effectively provides climate control, contributing to overall comfort and air quality in residential and commercial spaces.