AFUE- Annual Fuel Utilization Efficiency.
A measure of a gas furnace's efficiency in converting fuel
to energy the higher the rating, the more efficient
the unit. For example: A rating of 90 means that approximately
90 percent of the fuel is used to provide warmth to your
home, while the remaining 10 percent escapes as exhaust.
BTU- British Thermal Unit. This is the
amount of heat it takes to raise one pound of water one
degree Fahrenheit. For your home, it represents the measure
of heat given off when fuel is burned for heating or the
measure of heat extracted from your home for cooling.
CFM- Cubic Feet Per Minute. A standard
measurement of airflow. A typical system requires 400 CFM
per ton of air conditioning.
Capacity- The output or producing ability
of a piece of cooling or heating equipment. Cooling and
heating capacities are referred to on BTUs.
System- An exclusive feature of a high efficiency
home comfort system from Trane. This method of ramping
airflow gives you greater humidity control in cooling
and provides warmer air during heating start up.
Compressor- The heart of an air conditioning
or heat pump system. It is part of the outdoor unit and
pumps refrigerant in order to meet the cooling requirements
of the system.
Condensor Coil or Outdoor Coil- In an
air conditioner, the coil dissipates heat from the refrigerant,
changing the refrigerant from vapor to liquid. In a heat
pump system, it absorbs heat from the outdoors.
Damper- Found in ductwork, this movable
plate opens and closes to control airflow. Dampers can
be used to balance airflow in a duct system. They are also
used in zoning to regulate airflow to certain rooms.
Ductwork- Pipes or channels that carry
air throughout your home. In a home comfort system, ductwork
is critical to performance in fact, it's as critical
as the equipment.
Evaporator Coil or Indoor Coil- The
other half of your air conditioning system located inside
your home in the indoor unit. This is where the refrigerant
evaporates as it absorbs heat from the air that passes
over the coil.
Gas Furnace Heat Exchanger- Located
in the furnace, the heat exchanger transfers heat to the
surrounding air, which is then pumped throughout your home.
HSPF- Heating Seasonal Performance Factor.
This rating is used in measuring the heating efficiency
of a heat pump. The higher the number, the more efficient
Package Unit- A heating and cooling
system contained in one outdoor unit. A package unit is
typically installed either beside, on top of the home,
or sometimes in the attic.
Refrigerant- A chemical that produces
a refrigerating effect while expanding and vaporizing.
Most residential air conditioning systems contain R-22
refrigerant. R-22 is regulated by international controls
under the Montreal Protocol and in the United States by
the Environmental Protection Agency. It is scheduled to
be in production until the year 2020. It's used in approximately
95 percent of air conditioning equipment manufactured in
the U.S. today.
SEER- Seasonal Energy Efficiency Ratio.
A measure of cooling efficiency for air conditioners and
heat pumps. The higher the seer, the more energy efficient
the unit. The government's minimum SEER rating is 10. (It's
similar to comparing miles per gallon in automobiles.)
SEET- Seasonal Extreme Environmental
Test Lab. This is Trane's torture chamber for heating and
air conditioning systems, where five years of service are
condensed into 16 torturous weeks. If a product doesn't
make it through our SEET lab, it's not manufactured. We
push our equipment to extremes because we'd rather test
them in our lab than in your home.
Split System- The combination of an
outdoor unit (air conditioner or heat pump) with an indoor
unit (furnace or air handler). Split systems must be matched
for optimum efficiency.
Thermostat- A thermostat consists of
a series of sensors and relays that monitor and control
the functions of a heating and cooling system.
Ton- A unit of measurement used for
determining cooling capacity. One ton is the equivalent
of 12,000 BTUs per hour.
Zoning- A method of dividing a home
into different comfort zones so each zone can be independently
controlled depending on use and need.