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Community and Q&A

Panasonic ERV Hack

Mark Hyams | Posted in Mechanicals on

Has anyone ever tried the hack that Corbett uses in this video for his tiny house?

I’m thinking about doing it for the “master suite” in our house. Here’s a floor plan to peruse:

Mitsubishi mulit-zone short-cycling in moderate weather

The “master” is used as a home office / home theater / guest room, so the room has its door closed a lot and gets stuffy with high CO2 levels pretty quick. Alone it goes up to 1500 PPM pretty quick, and two people it’s at 2500 PPM within an hour.

I’m thinking of putting in this Panasonic Whispercomfort SPOT ERV in the bathroom, and doing the hack so the supply goes into the room. The existing bath fan exhausts through the wall, and I would reuse that penetration.

I’m also trying to figure out what to do to ventilate the rest of the house, as the baseline CO2 is about 1300 with the four creatures that live here: 2 adults, 1 child, 1 big dog. Happy to hear all thoughts!

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  1. Steve Knapp CZ 3A Georgia | | #1

    I would not put the Panasonic in the bathroom. The circuit board on this unit will short if exposed to moisture. The fuse is soldered on to the board, so not a simple fix.

  2. Mark Hyams | | #2

    What if it's not right over the shower? It'd be in the ceiling, so theoretically the only moist air that it would see would be going through its vents and core. Seems like a unit designed for moving moisture should be able to handle moisture.

  3. Steve Knapp CZ 3A Georgia | | #3

    I had one installed that way, and it failed repeatedly. I eventually had to move it to another location.

  4. Mark Hyams | | #4

    Curious if others have any ideas on how to ventilate this room. Thanks for the help!

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