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Is this furnace end cover necessary? (lemmy.today)
submitted 6 months ago by to c/diy@beehaw.org
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I am adding a UV light to my furnace coils. I decided to cut an access panel for easier cleaning and access to the UV light. I did not realize there were these triangular end covers for the A-frame of the furnace evaporator coils.

I don’t see them anywhere online when looking up diagrams of furnace coils. When I search online, it is also not clear if these covers are necessary. Are these covers beneficial? Or can I take one side off to fit the UV light underneath the A-frame?

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[–] 6 points 6 months ago* (1 child)

It looks like without them air will go around the coils rather than through them, but I'd need to see more of the system to be sure.

There's about a 2" gap from the cover to the side of the duct - lots of air will simply bypass the coils.

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  • [–] [S] 3 points 6 months ago

    My friend finally got back to me and said the same thing. I guess I learned something about furnace coils. I ended up making a compromise and just mounting the light into that end plate.

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