Annual Fuel Utilization
Efficiency. Indicated as a percentage, AFUE tells you how much energy is being
converted to heat. For example, an AFUE of 90 means that 90% of the fuel is
being used to warm your home while the other 10% escapes as exhaust.
The fan blower,
filter and housing parts of a system.
weight of a 1 square inch column of the earthís atmosphere.† At sea level this
pressure is 14.696 lb/sq inch
British Thermal Unit. One BTU is equal to the heat given
off by a wooden kitchen match. For heating systems, BTU is a measure of the heat
given off when fuel is combusted.
BTUs per hour.
The ability of your
air conditioning or heating system to heat or cool a space. For heating, this is
usually expressed in BTUs for cooling and in tons for heating.
Cubic Feet per Minute. A
measurement that indicates how many cubic feet of air pass by a given point in
controls the pressure applied to the refrigerant. It is necessary for taking in
heat to warm your home or getting rid of heat to keep your home cool. It is part
of a split-system heat pump or air conditionerís outdoor unit
The process by
which a gas is changed into a liquid at constant temperature by heat
refrigerant that is in a gas form back to a liquid, the coil sends heat carried
by the refrigerant to the outside. The coil is part of the outdoor portion of a
split-system air conditioner or heat pump.
A valve used in
ductwork that tightens or loosens so as to control airflow. Typically a damper
is used to control the amount of air entering certain areas of your home.
A heating system
that pulls outside air for combustion and vents combustion gases directly
This type of furnace
takes cool air from the top and blows warm air to the bottom. This type of
furnace is common when the furnace is located in a second-floor closet or
Motor. An ECM is an ultra high efficiency programmable brushless DC motor that
utilizes a permanent magnet rotor and a built-in inverter. They are
significantly more energy efficient than traditional AC motors and are also much
easier to control.
Electronic Air Cleaner
device filters out large particles and contaminants from indoor air then
electronically pulls out tiny particles that have been magnetized, such as
bacteria and viruses, then draws them to a collector plate.
Energy Load Analysis
known as a Heat Loss Analysis, an energy load analysis is a series of studies
performed to estimate the heating or cooling requirements of your home. It takes
information such as the square footage of your home, window and door areas,
insulation quality and local climate to determine the heating and cooling
capacity needed by your furnace, heat pump or air conditioner.
evaporator coil cools and dehumidifies the air by converting liquid refrigerant
into a gas, which absorbs the heat from the air. The warmed refrigerant is then
carried through a tube to the outdoor unit. The evaporator coil is part of the
indoor portion a split-system heat pump or air conditioner located
A general term used to identify, any
of a group of partially or completely halogenated simple hydrocarbons containing
fluorine, chlorine or bromine, which are used as refrigerants.
The part of a
furnace that transfers heat to nearby air.
Heat Loss Analysis
high-efficiency furnace provides your home with ideal heating comfort while
using less energy than other models. High-efficiency furnaces are designed to
extract additional heat from natural gas, condensing the flue gases in the
process. Also known as a condensing furnace.
A type of
furnace that draws in air from one side then heats it.† It then sends the warm
air out the other side. (Most often used in attics or crawl spaces)
A piece of
equipment that adds water vapor to heated air as it moves out of the
Heating Ventilation and
Air Conditioning and Refrigeration.
A heating and
cooling system comprised of products that have been certified to perform at
promised comfort and efficiency levels when specifically used together.
Equipped with a powered exhaust, Mid-efficiency gas furnaces
use a naturally aspirating burner and do not have a continuously lit pilot
light. They do not have a draft hood and the seasonal efficiency is much higher
than conventional furnaces.
furnace can operate in both vertical and horizontal flow orientations.
your purchase price and ongoing operating costs, a payback analysis determines
the number of years required before monthly energy savings offset the purchase
price. A payback analysis will give you an overall measure of the efficiency and
value of your heating and air conditioning system.
Puron R410A refrigerant
is an environmentally-sound refrigerant designed not to harm the ozone layer and
has been approved as a replacement for older Freon R22 refrigerant. All
manufacturers will be required to phase out the production of units using R22
refrigerant by 2010, and the complete phase out of R22 refrigerant will occur by
refrigerant to the manufacturer for disposal or recycling.
type of compressor used in air conditioners that compresses refrigerant by using
a piston-like action.
Refrigerant is a
substance that absorbs heat by changing from a liquid to a gas.† It then
releases this heat in a condenser as the substance returns from a gas back to a
Efficiency Ratio. This is a measure of the cooling efficiency of your central
air conditioner or heat pump. The higher the SEER number, the more efficient the
system is at converting electricity into cooling power.
A compressor specially designed to work in a circular
motion to compress refrigerant.
state-of-the-art electronic thermostat with built-in memory that can be
programmed for different temperature settings at different times of the day.
A heat pump or
air conditioner that has components in two locations, usually with part of the
system located inside and the other outside your home.
A unit that
monitors and controls your HVAC system.
One ton is equal 12,000
BTUH (A unit of measure for cooling capacity)
An upflow furnace
takes cool air from the bottom and blows warmed air out the top into the
ductwork. This type of furnace is usually installed in a basement or an out of
the way space.
A ventilators job
is to captures heating or cooling energy from stale indoor air and transfers it
to fresh incoming air.
A way to increase your
home comfort and energy efficiency by controlling when and where heating and
cooling occurs in a home. Programmable thermostats are used to control operating
times of the equipment while dampers are used to direct air flow to certain
parts of the home.