4 ms·

In a rental where you can't cut through the walls introduces challenges. I wonder if anyone has created a DIY window unit that incorporates a "ZEHNDER COMFOAIR

In a rental where you can't cut through the walls introduces challenges. I wonder if anyone has created a DIY window unit that incorporates a "ZEHNDER COMFOAIR 70" which is a small contained HRV unit that has c02 detection and can ramp fan speed to match co2. https://www.smallplanetsupply.com/small-planet-blog/2020/6/6/fresh-air-in-a-tiny-size https://www.smallplanetsupply.com/small-planet-blog/2020/6/6...

andbberger 3y ago
you can hookup the panasonic unit to a window manifold for a portable AC and put some insulation board over that. that is the only reasonable solution I have found for the states
- aifooh7Keew6xoo 3y ago
  I've had good success adding various utility and ventilation feed throughs in rentals with sliding glass door inserts, including large ducts for various HVAC experiments. I start with a board and cut/slot it so it fits neatly into the top and bottom tracks, then I move the latch receiver to the board, zip a few screws through the board where the holes won't be noticed. The glass door opening becomes a bit narrower, and I can cut as many holes as I want in that little bit of wall. If it's painted white it usually ends up looking better than most of the corporate maintenance work on the building.
walterbell 3y ago
Bionaire Everfresh (circa 2005) $150 window HRV was discontinued, https://www.youtube.com/watch?v=OcVowAsYVI4 https://www.youtube.com/watch?v=OcVowAsYVI4 $300 option from Alibaba, http://mistersustainable.blogspot.com/2021/08/another-mini-energy-recovery-ventilator.html http://mistersustainable.blogspot.com/2021/08/another-mini-e... $700+ options, https://old.reddit.com/r/hvacadvice/comments/wdl0mn/do_window_erv_or_hrv_units_exist/?rdt=63814 https://old.reddit.com/r/hvacadvice/comments/wdl0mn/do_windo... OpenERV design (writeup pending), https://x.com/open_erv https://x.com/open_erv

andbberger 3y ago

you can hookup the panasonic unit to a window manifold for a portable AC and put some insulation board over that. that is the only reasonable solution I have found for the states

aifooh7Keew6xoo 3y ago
I've had good success adding various utility and ventilation feed throughs in rentals with sliding glass door inserts, including large ducts for various HVAC experiments. I start with a board and cut/slot it so it fits neatly into the top and bottom tracks, then I move the latch receiver to the board, zip a few screws through the board where the holes won't be noticed. The glass door opening becomes a bit narrower, and I can cut as many holes as I want in that little bit of wall. If it's painted white it usually ends up looking better than most of the corporate maintenance work on the building.

walterbell 3y ago

Bionaire Everfresh (circa 2005) $150 window HRV was discontinued, https://www.youtube.com/watch?v=OcVowAsYVI4 https://www.youtube.com/watch?v=OcVowAsYVI4 $300 option from Alibaba, http://mistersustainable.blogspot.com/2021/08/another-mini-energy-recovery-ventilator.html http://mistersustainable.blogspot.com/2021/08/another-mini-e... $700+ options, https://old.reddit.com/r/hvacadvice/comments/wdl0mn/do_window_erv_or_hrv_units_exist/?rdt=63814 https://old.reddit.com/r/hvacadvice/comments/wdl0mn/do_windo... OpenERV design (writeup pending), https://x.com/open_erv https://x.com/open_erv