Thread: "Return air"

This is a town home built in 06. There is an access panel in the garage which houses an air handler, supplied by AC refrigerant and hot water lines heated by an electric water heater. The return air space is simply using open framing of the home to draw return air. The framing passes through several walls, they are not using a joist cavity. The return air also intersects the utility room which houses the water heater (electric) at least it's not gas. I called this out for further evaluation because I just laughed when I removed the cover. Owners want to know why is incorrect. I wanted to get your thoughts.

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Originally Posted by mathew stouffer

This is a town home built in 06. There is an access panel in the garage which houses an air handler, supplied by AC refrigerant and hot water lines heated by an electric water heater. The return air space is simply using open framing of the home to draw return air. The framing passes through several walls, they are not using a joist cavity. The return air also intersects the utility room which houses the water heater (electric) at least it's not gas. I called this out for further evaluation because I just laughed when I removed the cover. Owners want to know why is incorrect. I wanted to get your thoughts.

Well for starters the return air is being drawn from all over the place. At the bottom of the opening you can see dark streaks from the air the is being sucked in from the garage. I'm sure that return chase is not sealed and it is sucking air from every little hole and opening.

I think someone posted the IRC sections for dedicated return air lines in another recent thread. Return air is under section 1602, depending on conditions you could probably cite, #1, 3,4,
The bigger issues of course are the water leaks. That's a good amount of water leaking onto/into the wall. All that orange discoloration will turn black and moldy soon, get sucked into the air stream and possibly make occupants sick.
Repair or replace unit and water lines, remove all contaminated drywall and replace, possibly repair or replace contaminated framing, remove and replace any contaminated insulation, etc, etc.
See the dollar signs adding up. Good luck