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These 4 heating and cooling systems minimize operating costs
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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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The type of material used for resistance wire in electric heat is
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Central forced air electric furnaces frequently use _________ to start and stop multiple heating circuits.
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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
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Briefly describe a direct burner gas valve system.
Combustion is sometimes expressed as
What is the approximate oxygen content of air?
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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?
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The most versatile and widely used system used to heat and cool large buildings.
