You’re not alone! Whether you’re a San Antonio homeowner, property manager, or business owner, understanding HVAC (Heating, Ventilation, and Air Conditioning) terminology helps you make smart decisions about your comfort and energy efficiency.
This comprehensive HVAC glossary explains the most common terms, acronyms, and concepts you’ll encounter when dealing with air conditioning, heating, and ventilation systems.
A system or unit designed to remove heat and humidity from indoor air, providing cooling and comfort. Learn about AC repair services.
The number of times the air within a space is replaced with fresh air in one hour.
A rating that measures the efficiency of a furnace or boiler in converting fuel to heat. A higher AFUE means greater energy efficiency and lower heating costs.
The indoor component of an HVAC system that circulates conditioned air throughout your home or building.
A component in an air conditioning system that stores excess refrigerant and prevents it from entering the compressor.
A unit of measurement for energy. In HVAC, it indicates the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.
FAQ: What is a BTU in HVAC?
The heart of an air conditioning or heat pump system. It pumps refrigerant through the system, enabling heat transfer.
The outdoor coil in an AC or heat pump where heat is released from the refrigerant to the outside air.
The outdoor part of a split-system air conditioner or heat pump, containing the compressor, condenser coil, and fan.
A device that regulates the operation of an HVAC system, such as a thermostat.
A movable plate in ductwork that regulates and redirects airflow to specific areas of a building.
A device that removes moisture from the air to improve comfort and prevent mold growth.
A vent cover that distributes air evenly in a desired direction.
Pipes or channels that carry air throughout a building as part of a heating or cooling system. See our ductwork services.
A certification for products that meet or exceed energy efficiency guidelines set by the EPA.
The indoor coil in an AC or heat pump that absorbs heat from the air inside your home.
A component that removes dust, pollen, and other particles from the air before it enters the HVAC system.
Tip: Change your filter every 1-3 months for best performance.
A component in a furnace that transfers heat to the air, which is then distributed throughout the building.
A device that heats or cools by moving heat from one location to another. It can extract heat from the air or ground and is popular for its energy efficiency. Explore heat pump installation.
A rating that measures the efficiency of a heat pump in heating mode. Higher HSPF means lower heating costs.
A device that adds moisture to the air to improve comfort and indoor air quality.
A device that measures and controls humidity levels in a space.
An acronym for Heating, Ventilation, and Air Conditioning—the technology that provides indoor comfort.
FAQ: What does HVAC stand for?
A system that uses dampers in ductwork to regulate and redirect air to specific areas or “zones” in a building for customized comfort.
A measure of the cleanliness and healthiness of the air inside a building.
A technology that adjusts the speed of the compressor motor to regulate cooling or heating output for greater efficiency and comfort.
A rating that measures the effectiveness of air filters at trapping particles. Higher MERV ratings mean better filtration, but be sure to use a filter compatible with your system.
A chemical compound used in air conditioners and heat pumps to absorb and release heat as it circulates through the system.
A rating that measures the efficiency of an air conditioner or heat pump in cooling mode. Higher SEER means greater energy efficiency and lower cooling costs.
An HVAC system with components both inside and outside the building, such as a furnace or air handler indoors and a condenser outdoors.
A device that senses and regulates the temperature of a space by turning the HVAC system on or off as needed.
A motor that can operate at different speeds for more precise control of heating and cooling, improving efficiency and comfort.
A device that exchanges stale indoor air with fresh outdoor air, improving indoor air quality.
Systems designed to control humidity levels throughout an entire house, not just a single room.
What does HVAC stand for?
HVAC stands for Heating, Ventilation, and Air Conditioning. It refers to the systems that regulate indoor temperature, humidity, and air quality.
What is a BTU in HVAC?
BTU stands for British Thermal Unit. It measures the amount of heat an air conditioner or heater can add or remove from the air per hour.
What is SEER and why does it matter?
SEER stands for Seasonal Energy Efficiency Ratio. The higher the SEER rating, the more energy-efficient the system is, which can reduce your energy bills.
How often should I change my HVAC filter?
Most filters should be changed every 1-3 months, but check your manufacturer’s recommendations and adjust based on usage and local air quality.
What is indoor air quality (IAQ)?
Indoor air quality refers to the cleanliness and healthiness of the air inside your home or business, affected by dust, allergens, humidity, and ventilation.
Still have questions? Want to schedule AC repair, heating service, or an HVAC installation in San Antonio? Contact Kidd Mechanical for expert answers and friendly service!
