Get to know common HVAC terms so you can make confident decisions for your home or business.
Understanding these terms helps you navigate equipment and service decisions without the guesswork.
A - C
AFUE (Annual Fuel Utilization Efficiency)
Measures the efficiency of a furnace. A higher AFUE rating indicates more of your fuel is converted to heat.
Airflow
How air moves through your HVAC system. Poor airflow can cause uneven temperatures and system strain.
Air Purifier
A device that removes contaminants from indoor air, improving air quality and reducing allergens. Learn more about air purifier installation in Roanoke, VA here.
BTU (British Thermal Unit)
A unit of energy used to measure heating or cooling capacity. The right BTU rating ensures your system can effectively maintain your home’s comfort.
Central Air
A cooling system that uses a single outdoor unit and indoor ductwork to cool your entire home evenly.
Compressor
The part of an air conditioner or heat pump that pressurizes refrigerant to move heat out of your home.
Condenser
The outdoor component of an air conditioner or heat pump that releases heat collected from inside your home.
Condenser Coil
A coil in the condenser that allows refrigerant to release heat efficiently during the cooling process.
D - F
Dehumidifier
A device that removes excess moisture from indoor air, helping reduce mold, mildew, and humidity-related discomfort. Learn more about humidity control systems in Roanoke, VA here.
Ductless Mini Split
A heating and cooling system that provides conditioned air directly to individual rooms without ductwork.
Ductwork
The network of tubes that distribute heated or cooled air throughout your home. Properly sealed ducts prevent energy loss and improve comfort.
Energy Efficiency
How effectively a system uses energy to heat or cool your home; higher efficiency saves money and reduces energy waste.
Evaporator Coil
The indoor coil in an air conditioner or heat pump that absorbs heat from your home to cool the air.
Fan Coil
An indoor unit that contains a fan and coil to circulate heated or cooled air throughout a space.
H - L
HEPA (High Efficiency Particulate Air)
A type of air filter designed to remove at least 99.97% of airborne particles as small as 0.3 microns. HEPA filters are highly effective at capturing dust, pollen, pet dander, and other allergens, making them ideal for improving indoor air quality in homes and businesses.
Heat Exchanger
The part of a furnace that transfers heat to the air circulated through your home.
Heat Pump
An energy-efficient system that provides both heating and cooling by moving heat instead of generating it.
Humidifier
A device that adds moisture to the air to maintain comfortable humidity levels, especially in dry climates. Learn more about humidity control systems in Roanoke, VA here.
HSPF
Measures the efficiency of a heat pump in heating mode; higher ratings mean more energy savings.
HVAC (Heating, Ventilation, and Air Conditioning)
The overall system that keeps your home heated, cooled, and properly ventilated.
Humidity Control Systems
Systems like humidifiers and dehumidifiers that regulate indoor moisture levels for comfort and health.
Indoor Air Quality (IAQ)
Refers to the cleanliness and safety of the air inside your home. HVAC systems, filters, and ventilation affect IAQ. Air purifiers, humidity control systems, and UV light installation can improve IAQ significantly.
Licensed & Insured
Choosing a licensed and insured HVAC company in Roanoke, VA protects you and your home. Licenses prove the company meets state requirements, and insurance safeguards against accidents or damage during service.
Load Study
A professional assessment of your home’s heating and cooling needs to ensure your system is properly sized for comfort and efficiency.
M - Z
MERV (Minimum Efficiency Reporting Value)
A rating that measures how effectively an air filter traps airborne particles. Higher MERV ratings capture smaller particles, improving indoor air quality, but very high ratings can reduce airflow if your system isn’t designed for them. Quality air purifiers will use high-MERV filters.
Maintenance Program
A service plan that includes regular inspections, cleaning, and tune-ups to keep your HVAC system running efficiently and prevent costly repairs. You can view HVAC maintenance programs in Roanoke, VA here.
Operating Cost
The estimated expense to run your HVAC system, including energy usage, maintenance, and repairs.
Refrigerant
The substance used in air conditioners and heat pumps to absorb and release heat, enabling your system to cool or heat your home.
SEER (Seasonal Energy Efficiency Ratio)
Measures the efficiency of an air conditioner over a cooling season. Higher SEER ratings mean better energy efficiency.
Thermostat
The device that controls your HVAC system, regulating your home’s temperature. Smart thermostats can help save energy and improve comfort.
UV Lights
Ultraviolet lights that are installed in HVAC systems to help reduce bacteria, mold, and other microorganisms in your indoor air. Learn more about UV light installation in Roanoke, VA here.
Zoning
A system that allows different areas of your home to be heated or cooled independently, improving comfort and efficiency.
