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What is dilution air?
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T/F The latent heat BTU's and the refrigeration effect BTU'S can be the same for a refrigerant.
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______ load is when a space is to cold
Natural gas,
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A _______ _________ sample is taken from the flue gas to check the efficiency of a gas furnace.
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A building with multiple zones which are located all or mostly at the perimeter might use this type of system
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The type of material used for resistance wire in electric heat is
Manifold gauge pressure hoses should be checked or replaced on a regular basis because.
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Describe the difference between a forced draft system and an induced draft system.
T/F The Enthalpy(BTU's) of the saturated gas minus the Enthalpy(BTU's) of the liquid is equal to the latent heat(BTU's)
4 grains of moisture in the air the air can hold 16 what is relative humidity?
Another name for remote sensing in a flame rectification system is
The sequencer uses _________ (high or low) voltage control power to start and stop the electric heaters.
Briefly describe a direct burner gas valve system.
Combustion is sometimes expressed as
What is the approximate oxygen content of air?
What is meant by prepurging a heat exchanger?
What is the ideal ceiling height range for a boiler room?
The kw rating of an electric of an electric heater is the ____________(temperature rating, power rating, voltage rating, or name of the power company)
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What is an integrated furnace controller (IFC)?
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Explain why the preceding flame proving systems called safety devices.
Base board heaters transfer heat by
The center Hose and center chamber on the manifold is used to?
These 4 heating and cooling systems minimize operating costs
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Where are auxiliary limit switches used in heating applications?
The most versatile and widely used system used to heat and cool large buildings.
