Decoding Heating & Cooling Acronyms

March 3, 2017

The world of HVAC work is full of acronyms. When you are looking for help with your home comfort systems, it can be easy to be overwhelmed by the different acronyms and trying to keep up with what they mean. At Rick’s Heating & Cooling, we want our Ohio customers to clearly understand the decisions they are making for their homes, so we have this handy guide to help you understand the different acronyms that are out there that apply to your HVAC system.

Common HVAC Acronyms

  • AC – Air Conditioning or Alternating Current
  • ACCA – Air Conditioning Contractors of America
  • AFUE – Annual Fuel Utilization Efficiency
  • AHU – Air Handling Unit
  • AQS – Air Quality Systems
  • ASHRAE – American Society of Heating, Refrigeration and Air Conditioning Engineers
  • BAS – Building Automation System
  • BI – Backward Incline or Binary Input
  • BO – Binary Output
  • BTU/BTUH – British Thermal Unit/British Thermal Units per Hour
  • CAV – Constant Air Volume
  • CEM – Certified Energy Manager
  • CFM – Cubic Feet per Minute
  • CH – Chiller
  • CO – Carbon Monoxide or Clean Out
  • COP – Coefficient of Performance
  • DAT – Discharge Air Temperature
  • DC – Direct Current
  • DI – Digital Input
  • DO – Digital Output
  • EER – Energy Efficiency Ratio
  • FA – Fire Alarm
  • HD – Hot Deck
  • HFC – Hydrofluorocarbon
  • HR – Heat Recovery
  • HRU – Heat Recovery Unit
  • HSPF – Heating Seasonal Performance Factor
  • HSTAT – Humidistat
  • HVAC – Heating, Ventilation and Air Conditioning
  • HVAC&R – Heating, Ventilation, Air Conditioning and Refrigeration
  • HWP – Hot Water Pump
  • IAQ – Indoor Air Quality
  • IR – Infra-Red
  • LAT – Leaving Air Temperature
  • LHV – Lower Heating Valve
  • LON – Local Operating Network
  • IMC – International Mechanical Code
  • kW – Kilowatts
  • LWCO – Low Water Cut Off
  • MAT – Mixed Air Temperature
  • MAU – Makeup Air Unit
  • MCC – Motor Control Center
  • NEC – National Electric Code
  • NFPA – National Fire Protection Association
  • NTC – Negative Temperature Coefficient
  • PSIA – Pounds Per Square Inch Absolute
  • RH – Relative Humidity
  • RPM – Revolutions Per Minute
  • RTU – Roof Top Unit
  • SCADA – Supervisory Control and Data Acquisition
  • SD – Smoke Damper
  • SEER – Seasonal Energy Efficiency Ratio
  • SMACNA – Sheet Metal and Air Conditioning Contractors’ National Association
  • TEV – Thermostatic Expansion Valve
  • TSTAT – Thermostat
  • UV – Ultraviolet or Unit Ventilator
  • VAV – Variable Air Volume
  • VVT – Variable Volume/Temperature

Get Help from the HVAC Experts in Cincinnati

Even with this list, the number of acronyms can make getting the right help for your HVAC needs feel overwhelming. Rick’s Heating & Cooling has a team of knowledgeable, experienced, and professional HVAC technicians who can assist with all of your heating and cooling needs in Cincinnati. Give them a call at 513-899-6005 today for help.