Super into geeking out on high efficiency tight building envelopes these days... but alas, if we do it tight, we gotta have fresh air. Daniel found these great ductless HRV systems, Lunos e2 (German Engineered of course).
http://www.lunos.de/en/product/e_with_heat_recovery/
We are using them at ROOST ( www.roostbainbridge.com ), so we’ll be getting some great performance data over the next couple years. Shooting for NET ZERO! If you don't know what an HRV (heat recovery ventilator) is read this article...
https://en.m.wikipedia.org/wiki/Heat_recovery_ventilation
or ask my daughter, who says, "dad, can we just have one dinner hour where we do not talk about HVAC equipment!”
Thanks to Daniel for being really committed and a welcome squeaky wheel. And thanks to LUNOS and our friend Lucas at 475 High Performance Building Supply.
https://foursevenfive.com/about-us-3/about-475/