Precooling refrigerator coils

2479 Views 3 Replies 4 Participants Last post by surferdude2, Jan 12, 2020

KurtP

Discussion Starter · Jan 9, 2020

I will be installing a heat pump water heater soon. It will move a lot of cold to the interior, but was thinking of using some of this to feed into the fridge's heat rejection coils. Does anybody have ideas on duct size to feed air to the coils? I already had a metal shop create a manifold box to direct the cool air to the cellar and to help dry the clothes.

Kurt

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Chris616

· #3 · Jan 10, 2020

This will be counter-intuitive, but as long as the fridge cooling coils are not clogged with dust, directing colder air over them will not have any impact on the efficiency of the unit. The only way to use the cooler air to effect the efficiency of the fridge would be to cool the air around the fridge itself, reducing its cooling requirements, but that would be difficult to do.

If you would like a more technical explanation of why that is, let me know.

Chris

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