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1 what two methods are used to control the indoor fan2 provide a list of preliminary checks when troubleshooting oil
what two manual resets do all oil burners havewhat safety precaution should be followed when working on a furnace with
1 what is a salamander what type of gas space heater has no flame2 what is meant by a direct-vent heater3 why do some
1 how do infrared heaters transfer heat2 what type of fuel does a vaporizing oil pot heater use3 how is the oil
1 list the installation methods used to support an electric furnace2 is an electric furnace installation simpler than
1 what is necessary to make a safe connection with aluminum wire2 an electric furnace has a minimum circuit ampacity
1 why should furnaces not rest directly on the ceiling joists2 how is fiberduct connected to the furnace3 how is the
1 how can an electric baseboard heater be cleaned2 why are hydronic furnaces popular in geographical areas that do not
1 what is an advantage of an electric baseboard heater2 in what locations should electric baseboard heaters be
1 what is the function of a high-limit switch on an electric heater2 what is a fusible link on an electric heater3 how
1 how are electric heating elements rated2 how would a multistage thermostat operate for a heat pump system with
1 what happens to the current draw as an electric heating element warms up2 when would the blower come on in an
1 list three advantages of a warm-air electric furnace as compared to an oil or gas furnace2 what material are electric
1 why should the humidity level in the house be reduced as the outdoor temperature drops2 explain how a bypass
1 what advantages are there to adding humidity to heated air2 what is the desirable amount of relative humidity that
1 how can electric infrared heaters be mounted2 what distance should an electric infrared heater be from any other
1 what is a bi-flow thermostatic expansion valve2 what is the difference between the defrost cycle and the cooling
1 what is the difference between auxiliary heat and emergency heat2 what is the purpose of the crankcase heater3 what
1 what does the y terminal on most heat pump thermostats control and when is it energized2 why do air-source heat pump
1 what are the efficiency requirements for the energy star label to be awarded for an air-to-air heat pump2 what are
1 what type of heat pump is the most common and why2 what is the relationship between air-to-air heat pump heating
1 where is the permanent suction line always located on a reversing valve2 where is the permanent discharge line always
1 list the physics principles that make heat pump operation possible2 why do most heat pumps have two metering devices3
1 what is the difference between a cop and an hspf2 why are the coils in an air-source heat pump referred to as the
1 why are accumulators andor charge compensator tanks necessary in air-source heat pumps2 describe the operation of the