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common hvac terms

5 Common HVAC Terms You Should Know

Having AC or heating issues is stressful enough; the last thing would want to worry about is feeling lost and confused when dealing with a problem. We do our best to explain technical terms and walk you through issues whenever they arise, but it’s easy to feel lost when discussing complex HVAC systems. Here are five common HVAC terms you may hear during your HVAC service. 


This is part of the outdoor unit that compresses and pumps refrigerant to cool down your home. When your unit comes on and you hear noise from your system, this is likely where it is coming from. 

Heat Pump

A heat pump works by moving heat inside or outside your home. A heat pump transfers the heat to cool or heat your home. A heat pump removes heat from your home and moves it outdoors during the summer. In the winter, a heat pump draws warm outdoor air in and circulates it through the air ducts. 


This outdoor part of your air conditioner or heat pump releases or collects heat (depending on the season). According to Lennox, the condenser cabinet contains the condenser coil, a compressor, a fan, and controls. The condenser coil can be copper tubing with aluminum fins or all-aluminum tubing so heat can rapidly transfer. 


The primary function of an air register is to supply air. These cover a hole in the wall (inlets and outlets of your ductwork) and can be found on your home’s floor or ceiling. 

Air Handler

This unit inside the house circulates air through the duct system. It is paired with a split system air conditioner or heat pump. This is the box that contains the blower. It also usually includes the evaporator coil and other heating/cooling elements. It also handles filtration in your home. 

Is it time to have your HVAC unit professionally serviced? When it is time for your bi-annual check-up, these five common HVAC terms should help you better understand your system. Give us a call today to schedule your service! 

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