How does the staging and sequence of operation for a dual fuel heat pump system differ from a traditional heat pump with electric strip heat?

What will be an ideal response?


Traditional keeps heat pump on when strips are energized for second stage. Dual fuel heat pump shuts off when furnace comes on for second stage.

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How are electronic air cleaner cells cleaned?

What will be an ideal response?

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Aluminum screening can be considered a more environmentally friendly product than flexible ____, which is coated with soft PVC that is manufactured with harmful phthalates.

A. copper B. steel C. fiberglass D. composition

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____ science is the study of the interaction of building systems and components, occupants, and the surrounding environment, focusing on the flows of heat, air and moisture.

A. Material B. Architecture C. Construction D. Building

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When soldering 1-1/2? tubing in a horizontal position, you should _____

a. feed the solder from a single point b. start feeding solder at the top and work down c. start feeding solder near the bottom and work up d. turn the assembly to the vertical position first

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