- Stands for Annual Fuel Utilization Efficiency. This
number represents how efficiently a furnace converts fuel to energy. The
higher the rating, the more fuel-efficient the furnace is. Percentage of
fuel used for heating.
- Air Handler
- The portion of your air conditioner or heating
system that forces air through your home's ductwork.
- Stands for British Thermal Units. This number
indicates the amount of heat it takes to raise one pound of water one degree
Fahrenheit. The higher the BTU rating, the larger the heating capacity of
the furnace or air conditioner. Homes are measured to determine the number
of BTUs required from a heating or cooling system.
- Carbon Monoxide
- A colorless, odorless, highly poisonous gas produced
when carbon burns without sufficient air nearby.
- Stands for Cubic Feet per Minute. A measurement of
airflow that indicates how many cubic feet of air pass by a stationary point
in one minute. The higher the number, the more air is being forced through
- The Compressor is the most important piece of a
heating or cooling system. Located in the outdoor unit, the compressor is
responsible for pumping refrigerant throughout the system.
- Condenser Coil
- The outdoor portion of a heating or cooling system
that either releases or collects heat from the outside air, depending on the
time of year. The Condenser Coil is connected directly to the home's Air
Handler and is also known as the Outdoor Coil.
- A movable plate that controls airflow through a
ductwork system. Dampers are used to direct air to the areas of the home
that need it most.
- Hollow pipes used to transfer air from the Air
Handler to the air vents throughout your home. Ductwork is one of the most
important components of a home heating and cooling system.
- Evaporator Coil
- This is where refrigerant evaporates as it removes
heat from the air that is passed over it. The Evaporator Coil is located in
the indoor unit and is also referred to as the Indoor Coil.
- Heat Exchanger
- The part of a furnace that transfers heat to nearby
air. That air is then distributed through the Ductwork throughout your home.
- Heat Pump
- A heating and air conditioning unit that heats or
cools by moving heat.
- A component that adds moisture to the air before it
is distributed by the Ductwork throughout the house.
- Stands for Heating, Ventilation, and Air
- A chemical that cools air as it evaporates. Air
conditioning systems use Refrigerant in the Evaporator Coil to cool air as
it passes by.
- Refrigerant Lines
- Two copper lines that connect the Condenser
(Outdoor) Coil to the Evaporator (Indoor) Coil.
- Stands for Seasonal Energy Efficiency Ratio. An
efficiency measurement that is similar to Miles Per Gallon for cars. The
higher this number, the more energy efficient they system is. New units have
SEER ratings from 10 to 17 BTUs per watt.
- Package unit
- One outdoor unit that contains both a heating and a
- Split System
- A combination heat pump or air conditioner with
indoor components such as a furnace or blower coil. To maximize
effectiveness, Split Systems should be matched.
- A device that allows you to control the temperature
inside your home by telling the heating or cooling system how much air to
- The dividing of a home into different areas each
with their own heating and cooling properties. For example, you might prefer
to have the kitchen area of your home be slightly cool, while at the same
time keeping the temperature in the bedrooms warmer.