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题库 Science 题目列表 With regard to water heaters, which of the followi...
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With regard to water heaters, which of the following options presents energy savings of up to 30%?
A.

Replacing the tank water heater by an on-demand water heater

B.

Insulating pipe lines up to 6ft away from the heater

C.

Using heat pump water heaters

D.

Insulating the surroundings of the water heater

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