In HVAC terminology, TAB stands for Testing, Adjusting, and Balancing. It is a systematic process to verify that heating, ventilation, and air conditioning systems deliver design airflow, water flow, and thermal conditions, ensuring efficiency, comfort, and indoor air quality.
Auxiliary heat (often labeled ‘Aux Heat’ on thermostats) is a secondary heating source triggered when a heat pump cannot meet the heating demand alone, typically during very cold weather or when the system is in defrost mode. It usually refers to electric resistance heating or a backup furnace.
On a Honeywell thermostat, ‘Recovery’ refers to a feature that pre-heats or pre-cools a home before a scheduled temperature change, ensuring the desired temperature is reached exactly at the programmed time. This adaptive function improves comfort and energy efficiency by learning how long the system needs to adjust temperatures.
The ‘Hold Until’ feature on a thermostat allows a user to override the programmed schedule and maintain a specific temperature until a designated time, at which point the thermostat returns to its regular schedule. It provides temporary control over heating or cooling without permanently changing the programmed settings.
Eco mode on an air conditioner stands for Economic or Ecology mode. It optimizes energy consumption by adjusting temperature and fan settings. This feature helps reduce electricity bills while maintaining comfortable cooling.
The “Fan” setting on an air conditioner controls the operation of the unit’s fan independently from the cooling function. It circulates air within the room without cooling it, providing ventilation and air movement.
The ‘Run Schedule’ setting on a thermostat allows users to program heating or cooling cycles according to a predefined timetable, optimizing energy use and comfort.
In HVAC terminology, a ton refers to cooling capacity rather than weight. One ton equals 12,000 British Thermal Units (BTUs) per hour. This measurement standardizes air conditioning system sizing across the industry.
In air conditioning, a ‘ton’ is a unit of cooling capacity equal to 12,000 British Thermal Units (BTU) per hour. It originated from the amount of heat required to melt one ton of ice over 24 hours and is commonly used to size residential and commercial HVAC systems.
On an air conditioner (AC) remote or thermostat, the ‘CIRC’ setting typically stands for ‘circulate’ or ‘circulation’ mode. This mode runs the fan continuously or intermittently without activating the cooling or heating functions, helping to distribute air evenly and improve indoor air quality.