your definitions of "comfort" may be different
than your neighbor's, knowing these terms can help make
your search for improved comfort and efficiency much less
confusing and much more effective.
Reciprocating Compressor -Type of compressor that
uses a more efficient process for compressing refrigerant
for better cooling efficiency.
-Annual Fuel Utilization Efficiency. Indicated
as a percentage, your furnace's 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 with the combustion
-British Thermal Unit. Used for both heating and
cooling, BTU is a measure of the heat given off when fuel
is combusted. Or for cooling, it's a measure of heat extracted
from your home. One BTU is equal to the heat given off by
a wooden kitchen match.
-The ability of a heating or cooling system to
heat or cool a given amount of space. For heating, this
is usually expressed in BTUs. For cooling, it is usually
given in tons.
-Part of a split-system heat pump or air conditioner's
outdoor unit that controls the pressure applied to the refrigerant,
necessary for taking in heat to warm your home or getting
rid of heat to keep your home cool.
Coil -Part of the outdoor portion of a split-system
air conditioner or heat pump. By converting refrigerant
that is in a gas form back to a liquid, the coil sends heat
carried by the refrigerant to the outside.
-A type of "valve" used in duct work
that opens or closes to control airflow. Used in zoning
to control the amount of warm or cool air entering certain
areas of your home.
-A type of furnace that takes cool air from the
top and blows warm air to the bottom-common where your furnace
must be located in a second-floor closet or utility area.
Air Cleaner (EAC) -An electronic device that filters
out large particles and contaminants in indoor air. It then
electronically pulls out tiny particles that have been magnetized,
such as viruses and bacteria, drawing them to a collector
Estimate -A series of studies performed to determine
the heating or cooling requirements of your home. An energy
load analysis uses information such as the square footage
of your home, window or door areas, insulation quality and
local climate to determine the heating and cooling capacity
needed by your furnace, heat pump or air conditioner. When
referring to heating, this is often known as a Heat Loss
Analysis, since a home's heating requirements are determined
by the amount of heat lost through the roof, entry ways
Coil -Part of a split-system air conditioner or
heat pump located indoors. The 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 (condenser
Coil -An indoor component of a heat pump system,
used in place of a furnace, to provide additional heating
on cold days when the heat pump does not provide adequate
-Term used for Heating, Ventilation, and Air Conditioning
-The Heating Seasonal Performance Factor is a measure
of the heating efficiency of a heat pump. The higher the
HSPF number, the more efficiently the heat pump heats your
Flow -A type of furnace, installed on its "side," that draws in air from one side, heats it and sends the
warm air out the other side. Most often used for installations
in attics or crawl spaces.
-A piece of equipment that adds water vapor to
heated air as it moves out of the furnace. This adds necessary
moisture to protect your furnishings and reduce static electricity.
System -A heating and cooling system comprised
of products that have been certified to perform at promised
comfort and efficiency levels when used together, and used
according to design and engineering specifications.
Cost -The day-to-day cost of running your home
comfort equipment, based on energy use.
Analysis -Overall measure of the efficiency and
value of your home comfort system. By combining your purchase
price and ongoing operating costs, a payback analysis determines
the number of years required before monthly energy savings
offset the purchase price.
PuronT Refrigerant -Puron is an environmentally sound
refrigerant designed to protect the earth's ozone layer.
Federal law requires all manufacturers phase out ozone depleting
refrigerants in the next few years. Puron is approved by
the US Environmental Protection Agency as a replacement
from Freon 22*.
-Returning used refrigerant to the manufacturer
for disposal or reuse.
Compressor -A type of compressor used in air conditioners
that compresses refrigerant by using a type of "piston" action.
-Removing, cleaning and reusing refrigerant.
-The Seasonal Energy Efficiency Ratio is a measure
of the cooling efficiency of your air conditioner or heat
pump. The higher the SEER number, the more efficient the
system is at converting electricity into cooling power.
Compressor -A specially designed compressor that
works in a circular motion vs. an up and down piston action.
Thermostat -A state-of-the-art electronic thermostat
with a built-in memory that can be programmed for different
temperature settings at different times of the day.
System -Refers to an air conditioner or heat pump
that has components in two locations. Usually, one part
of the system is located inside (evaporator coil) and the
other is located outside your home (condenser coil).
-The Thermidistat Control monitors temperatures
both inside and outside, as well as indoor humidity and
adjusts system operation to maintain the temperature and
humidity levels set by the homeowner.
-Unit that monitors and controls your HVAC system
-A unit of measure for cooling capacity. One ton
= 12,000 BTUs per hour.
-A type of furnace that draws cool air from the
bottom and blows the warmed air out the top into the duct
work. This type of furnace is usually installed in a basement
or an out-of-the-way closet.
-A ventilator captures heating or cooling energy
from stale indoor air and transfers it to fresh incoming
-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. Dampers are used to direct
air flow to certain parts or "zones" of the home.
Freon is a trademark of E.I. Dupont.