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HVAC Terminology

• AC
• ACCA
• A-Coil
• AC or DC
• Acoustical
• AFUE
• AGA
• AHRI
• Air cleaner (also Air Filtration System)
• Air Conditioner
• Air Filtration System (also Air Cleaner)
• Air flow volume
• Air handler
• ASHRAE
• BTU
• BTUh
• Burner
• Burner Orifice
• Burner (sealed combustion)
• CADR Clean Air Delivery Rate (CADR)
• Capacity
• Celsius
• Certified Matched System
• CFM
• Charge
• Comfort™ coil (also evaporator coil or indoor coil)
• Compressor
• Condensate
• Condenser coil (or outdoor coil)
• Condenser fan
• Contactor
• Crankcase heater
• CSA
• Damper
• DB (Decibels)
• DC
• Defrost
• Degree-day
• Dehumidifier
• Diffuser
• DOE
• Downflow furnace
• Drain pan
• Dry bulb temperature
• Dry bulb thermometer
• Dual Compressors
• Ductwork
• DX
• Ecologic
• EER
• Electronic Air Cleaner (EAC)
• EPA
• Evaporator coil (also Comfort™ Coil or Indoor coil)
• Expansion valve
• Fahrenheit
• Fan
• Filter
• Flue
• Furnace
• Fuse
• GAMA
• Gas furnace heat exchanger
• Heat exchanger
• Heat gain
• Heating coil
• Heat loss
• Heat pump
• Heat transfer
• HEPA filter
• Hertz
• Horizontal flow
• HSPF
• Humidifier
• Humidistat
• Humidity
• Humidity, absolute
• Humidity, relative
• HVAC
• Hybrid heat (also Hybrid System)
• Hybrid system (also Hybrid Heat)
• Ignition
• Indoor coil (also Comfort™ Coil or evaporator coil)
• Indoor/Outdoor system (also split system)
• Inverter Compressor
• Kilowatt (kW)
• Latent heat
• Load calculation
• Media
• NATE
• NEC
• NEMA
• OEM
• Operating cost
• Orifice
• Outdoor coil (also Condenser coil)
• Packaged system (or Packaged unit)
• Packaged unit (or Packaged system)
• Payback analysis
• PSI
• PSIA
• PSIG
• PVC
• Reciprocating compressor
• Reclaiming
• Recycling
• Refrigerant
• Refrigerant charge
• Refrigerant lines
• SEER
• Self-contained system
• Sensible heat
• Sensor
• Setpoint
• Spine-Fin™ coil
• Split system (also indoor/outdoor system)
• Thermostat
• Thermostatic expansion valve
• Ton
• Two-stage compressor
• Two-stage heating/Two-stage cooling
• U-Factor
• UL
• Upflow furnace
• Vacuum
• Volt
• Voltage
• Watt
• Wet Bulb Thermometer
• Zoning
• Zoning System