What is a Blower?

A central fan that pushes heated air from a furnace down the duct system or air across an air conditioner’s evaporator coil and down the duct system.

What is an Evaporator?

The indoor coil of an air conditioner where liquid refrigerant evaporates, drawing heat from the surrounding air, “cooling” the air.  In a “packaged” system, all components are located in a single, outside unit.

What is a Condensing Unit?

Air conditioning equipment that typically sits outside a house, containing a condenser coil and compressor.  The compressor raises the pressure of refrigerant vapor and the condenser coil converts the refrigerant vapor to liquid.

What is ARHI?

Air-conditioning Heating & Refrigeration Institute, an association of equipment manufacturers that publishes industry rating standards.

What is NATE?

North American Technician Excellence, the professional certification body for heating and air conditioning technicians.

What is a Load Calculation?

A calculation process for determining the amount of heating and air conditioning required to heat or cool a house.  Most load calculations are based on “Manual J” from the Air Conditioning Contractors of America.

What is Bels?

A measure of sound used for rating air conditioners.  10 decibels = 1 bel.  Fewer bels means quieter operation.  The scale is logarithmic like the Richter Scale, so an increase of 0.3 bels doubles the sound.

What is SEER?

Seasonal Energy Efficiency Ratio, a measure of an air conditioner’s efficiency over the entire cooling season.  A higher SEER denotes higher efficiency.  The current minimum is 13, which was considered “high efficiency” a few years ago.