efficiency of around 60%. Most of the heat is lost up the chimney or out the exhaust
vent - devices used by older furnaces to expel dangerous fumes created by the
furnace, such as carbon monoxide, carbon dioxide, aldehydes, and even soot.
Air Handler - A fan-blower , heat transfer coil and housing parts of a system.
Air Infiltration - The unwanted entrance of air due to suck things as leakage, temperature difference
or wind.
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.
Back Pressure - This is the refrigerant pressure in the low side of the system also called low side
pressure or suction pressure.
Balanced Pressure - when the both the inside and outside pressure of a container equal each other.
Barometer- is used to measure atmospheric pressure.
Barometric Damper - Also called draft damper, is a device installed in a chimney to allow for the
adjustment of dilution air.
Blower - similar to a fan used to push air.
Boiler - device for heating water or generating steam above atmospheric pressure.
CFM - Cubic Feet Per Minute. A standard measurement of airflow. A typical system
requires 400 CFM per ton of air conditioning.
Calorie - the amount of heat ( by weight) that is required to raise the temperature of water 1 degree
Celsius.
Capacity - The output or producing ability of a piece of cooling or heating equipment.
Cooling and heating capacities are referred to in BTUs.
Charge - The amount of refrigerant in a system.
Charging - to add a charge of refrigerant to a system.
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.
Condenser Coil -The coil responsible for dissipating heat to the surrounding, outside air.
Also called the condenser coil, or outdoor coil, its role is reversed when a heat pump is
used in heating mode.
Cycle - Series of events or operations which have tendency to repeat in the same order.
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.
EcoLogic - Maytag's designation of green heating and cooling equipment.
Electronic Air Cleaner - An electronic device that filters out particles and contaminants
in indoor air.
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.
Heat Exchanger - The major part of the furnace that transfers heat into your home.
Heat Pump - A unit that handles both heating and cooling. In some climates, a heat pump may
handle your heating and cooling needs more efficiently than a furnace and air conditioner.
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 the unit.
Humidifier - A piece of equipment that adds moisture to the air as it comes out of the furnace.
HVAC - Heating, Ventilation and Air Conditioning
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 has a long life ahead of it as 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 1. (It's similar to comparing miles per gallon
in automobiles.)
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.
Ventilator - A ventilator captures heating or cooling energy from stale indoor air and transfers it to
fresh incoming air.
Zoning - A method of dividing a home into different comfort zones so each zone can be
independently controlled depending on use and need.
vent - devices used by older furnaces to expel dangerous fumes created by the
furnace, such as carbon monoxide, carbon dioxide, aldehydes, and even soot.
Air Handler - A fan-blower , heat transfer coil and housing parts of a system.
Air Infiltration - The unwanted entrance of air due to suck things as leakage, temperature difference
or wind.
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.
Back Pressure - This is the refrigerant pressure in the low side of the system also called low side
pressure or suction pressure.
Balanced Pressure - when the both the inside and outside pressure of a container equal each other.
Barometer- is used to measure atmospheric pressure.
Barometric Damper - Also called draft damper, is a device installed in a chimney to allow for the
adjustment of dilution air.
Blower - similar to a fan used to push air.
Boiler - device for heating water or generating steam above atmospheric pressure.
CFM - Cubic Feet Per Minute. A standard measurement of airflow. A typical system
requires 400 CFM per ton of air conditioning.
Calorie - the amount of heat ( by weight) that is required to raise the temperature of water 1 degree
Celsius.
Capacity - The output or producing ability of a piece of cooling or heating equipment.
Cooling and heating capacities are referred to in BTUs.
Charge - The amount of refrigerant in a system.
Charging - to add a charge of refrigerant to a system.
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.
Condenser Coil -The coil responsible for dissipating heat to the surrounding, outside air.
Also called the condenser coil, or outdoor coil, its role is reversed when a heat pump is
used in heating mode.
Cycle - Series of events or operations which have tendency to repeat in the same order.
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.
EcoLogic - Maytag's designation of green heating and cooling equipment.
Electronic Air Cleaner - An electronic device that filters out particles and contaminants
in indoor air.
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.
Heat Exchanger - The major part of the furnace that transfers heat into your home.
Heat Pump - A unit that handles both heating and cooling. In some climates, a heat pump may
handle your heating and cooling needs more efficiently than a furnace and air conditioner.
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 the unit.
Humidifier - A piece of equipment that adds moisture to the air as it comes out of the furnace.
HVAC - Heating, Ventilation and Air Conditioning
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 has a long life ahead of it as 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 1. (It's similar to comparing miles per gallon
in automobiles.)
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.
Ventilator - A ventilator captures heating or cooling energy from stale indoor air and transfers it to
fresh incoming air.
Zoning - A method of dividing a home into different comfort zones so each zone can be
independently controlled depending on use and need.
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. Federal law has required that all new residential furnaces
built after January 1992 operate with an AFUE of 78% or higher.
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. Federal law has required that all new residential furnaces
built after January 1992 operate with an AFUE of 78% or higher.
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