When HN users recommended it
1 HN user recommended this between 2022 and 2023, in 2 comments.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
Bionaire BAP336M U EverFresh Exchange Purifier
Amazon's catalog no longer lists this product (checked 2026-11-02). The name comes from the link HN users posted.
More links via above thread.
2016 pipe design with 3" metal duct inside 4" PVC pipe, https://www.loudawson.com/17884/how-to-build-air-cross-flow-...
2012 box design with aluminum foil on wood frames, https://makezine.com/projects/heat-exchanger/
Elegant $100 commercial window HRV, discontinued (why?), https://www.amazon.com/Bionaire-BAP336M-U-EverFresh-Exchange... & https://ia904509.us.archive.org/29/items/manualzilla-id-7067...
An elegant $100 commercial window HRV was discontinued, there don't seem to be any alternatives at that price point, https://www.amazon.com/Bionaire-BAP336M-U-EverFresh-Exchange.... Product manual might be useful for DIY: https://ia904509.us.archive.org/29/items/manualzilla-id-7067...
Commercial ERV/HRV units start around $500, https://www.greenbuildingadvisor.com/question/inexpensive-ef...
DIY counter-flow design with coroplast sheets, https://ecorenovator.org/forum/showthread.php?t=891&page=38#...