Zoning and Zone Control of Heating, Ventilating and Air Conditioning (HVAC) Systems are two ways of saying individual temperature control from one central HVAC System. Typically with almost all forced air systems there is only one thermostat to control the heating and cooling. Once that thermostat calls there is virtually no way to control the temperature in each room of the house except manually closing off the outlets in each room.
Why Do I Need Zone Control?
This manual method is time consuming and can cause harm to the HVAC Unit as closing off too many outlets can reduce the airflow in the HVAC severely shortening the life of the furnace, air conditioner or heat pump.
True zoning is a professionally installed zone control system consisting of a damper and thermostat for each room or zone of the house and wired into a central control panel that sequences each thermostat’s call with the zone dampers in the ducts and the HVAC Unit. In some instances a by-pass damper or duct maybe required to relieve excess air when smaller zone(s) are the only ones calling.
Zoning can simply be related to having a light switch in every room of the house. You wouldn’t install just one light switch to turn on and off all of the lights in the house….Would you? The same is true for heating and cooling. One thermostat turning on the heating or cooling for the entire house, when you only need a little in one room or zone is extremely wasteful. Also, why heat or cool rooms that may already be comfortable and air is needed in other portions of the house