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Home > HVAC > Commercial HVAC Terms to Know

Airflow: A term we generally use to refer to the distribution of the air in your building.

AOH: Simply stands for ‘Annual Operating Hours’.

Bioaerosols: Refers to small, microscopic organisms that thrive in humid environments (something we work to avoid!).

BTU: British Thermal Unit. A way that systems are measured that refers to the amount of heat it takes to raise a pound of water in temperature.

Capacity: How large a space a unit can heat or cool.

Central Air Conditioning System: The central unit that distributes treated air. Preferably in a central location to efficiently distribute said air.

Condenser Coil: The section of the unit that is outside to either draw in or release heat.

DOE: Department of Energy. The DOE sets the standards for efficiency and helps monitor energy usage.

Electronic Air Cleaner: This device aids in filtering out oversized particles and bioaerosols.

Heat Exchanger: A device that enables the transfer of heat from one liquid to another without them actually coming into contact.

HSPF: Heating Seasonal Performance Factor. A term used to describe how efficient heat pumps are.

Humidistat: Used to keep humidity in a space at a fixed point.

HVAC: Heating, ventilation, and air conditioning.

LEED: Leadership in Energy and Environmental Design.

MERV Rating: Minimum Efficiency Reporting Value. This refers to the size of the holes through which air passes through a filter. The smaller the hole, the higher the rating and therefore the higher the efficiency.
Particles: All substances smaller than 100 microns.

Refrigerant: When expanded or vaporized, this chemical simulates a cooling effect.

SEER: Seasonal Energy Efficiency Ratio. The higher the number, the better performance, and savings.

Single Package: A single outdoor unit that contains the heating and cooling system.

Thermidistat: An all-encompassing device used to monitor both humidity and adjusts temperature.

Ton: Used to determine cooling capacity of a unit.

Ventilator: Pulls outdoor air inside while pushing stale, indoor air out.

Zoning: The ability to control when and where heating and cooling occurs.