Tiny house ventilation / Discussions

...tiny houses in cold climates would in our opinion be ductless wall-insert models. you can see them here in our green building products directory -  Find the best ductless HRV air exchanger for tiny houses in cold climates These types of heat recovery ventilation systems are great for tiny houses as well as renovations,...

...tiny home and a compact ductless model like the Lunos e2 HRV looks ideal - but I'm finding the price of them to be too high. What I'm wondering is whether any equivalent models exist and do they come in at a more affordable cost? Ductless HRVs like this are for sure a great option, and particularly for tiny houses and ...