Why are liquid-line filter driers required for all systems using HFC refrigerant?
A) Because HFC refrigerants often form fluoride crystals inside the system.
B) Because the filter drier is also the metering device in newer systems.
C) Because the POE oil used with HFC refrigerant is very hygroscopic.
D) Because the filter drier also serves as a reservoir for refrigerant.
C
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A. ?thermoplastic B. ?foamed C. ?thermosetting D. ?laminate
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Heat units are calculated by taking the average temperature for the month minus 50°F
Indicate whether the statement is true or false
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Describe the effective resistance effect.
What will be an ideal response?
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Solar air collectors are mounted vertically on ____ facing walls or on a roof slope.
A. north B. south C. east D. west
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