When you’re faced with a heating system or cooling system repair or replacement in New Jersey, you may feel overwhelmed, especially if you are not sure of the different HVAC (Heating, Ventilating, and Air Conditioning) technical terms that are used. It’s common to feel confused when your technician or sales person uses technical heating system or cooling system terms that you may not understand. Having a basic understanding of HVAC terminology will help you when you need a heating system or cooling system repair or if you’re having a new heating system or cooling system installed. Below, you’ll find ten common HVAC terms.
AFUE. The ratio of useful
energy output to energy input, expressed as a percentage. For example, a 90%
AFUE for a natural gas furnace means it outputs 90 British Thermal Units (BTUs)
of useful heating for every 100 BTUs of natural gas input (where the rest may
be wasted heat in the exhaust). A higher AFUE means higher efficiency1.
BTU. British thermal
units; a measurement of heat. A single BTU is the
amount of heat required to raise 1 pound of water by 1 degree Fahrenheit. This
is good indication of how powerful your boiler is and how well it is operating.
A higher BTU rating means a greater heating capacity.
Coil. Your HVAC system uses
a condenser coil in the outdoor unit and an evaporator coil in the indoor unit.
These coils use heat transfer to change the temperature of the air.
Compressor. In a central AC system,the compressor
is located within the outside condenser unit. It is responsible for circulating
and raising the pressure of the refrigerant in your system.
Ductwork. A system of metal or synthetic tubes that pass air through your home
from your forced hot air and central AC system. This is a key part of your HVAC
system, so it is important you maintain your ducts.
Ratio (EER). The ratio of your AC
system’s cooling capacity (in British thermal units or BTUs) per hour to the
power input in watts. A higher EER rating means a more efficient system.
Heat Exchanger. A component located
in a natural gas furnace. It transfers heat to the air around it. This air is
then circulated through the home to warm it.
Line Set. These are the two lines of refrigerant that
connect the evaporator coil and condensing unit in a central AC system. The
small, copper tube is the liquid line, while the large and more insulated tube
is the suction line.
chemical that produces cooling effects while vaporizing or expanding. If your
AC system was installed prior to 2010, it probably uses R-22 refrigerant (also
known as Freon®). Newer AC systems use R-410-A.
SEER. This stands for Seasonal Energy Efficiency
Ratio. It measures the efficiency of an air conditioner. The SEER rating of a
unit is the cooling output during a typical cooling-season divided by the total
electric energy input during the same period. Currently, the minimum SEER
rating for a system is 13. The higher the SEER rating, the more energy the
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