What is mineral insulated mi heating cable mi cable

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57-20) What is mineral insulated (MI) heating cable?
UNIT 58 REVIEW QUESTIONS ANSWER KEY 58-1) What advantages are there to adding humidity to heated air?
58-2) What is the desirable amount of relative humidity that should be maintained?
58-3) What are the two general categories of humidifiers?
58-4) What types of humidifiers work well with heat pump systems?
58-5) Which type of humidifier requires the least cleaning?
58-6) Why do most humidifiers require annual cleaning and media replacement?
58-7) Why should the humidity level in the house be reduced as the outdoor temperature drops?
58-8) Explain how a bypass humidifier works.
58-9) What are the two most common controlling elements in a mechanical humidistat?
58-10) How is steam humidifier operation different from evaporative humidifier operation?
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