Hacker News Reader

Most houses (at least in the US) are so leaky that an ERV/HRV is just going to suck all the heat out, and cold air is going to come in through all the drafty places (and that doesn't necessarily mean fresh air, could be stale air from your crawl space).

Wouldn't recommend for any existing construction unless you know how air tight your house is (get a blower door test done).

The problem with small systems like the LUNOS e² is that they're incredibly overpriced. I wouldn't be surprised if its BoM is well under $50. It's basically some fans and plastic pieces.

That’s partly why i posted, i was hoping to learn of alternatives. Even at high prices, if the product works well and achieves the health gain...

Thanks for the tip, the LUNOS e² looks interesting.