Passive House - Fresh Air System Install & Costs (Zehnder)
Why Hacker News recommends it
Pointed to in HVAC and indoor-air threads as a hands-on look at high-end ventilation and ERV installation.
What it is
Matt Risinger covers installing a Zehnder ERV fresh-air system in a tight passive house, explaining balanced ventilation, the benefits of heat recovery and the costs involved.
Recommended by 1 HN commenters across 1 different months, 2020 to 2022.
What Hacker News said
Recommends sd_mikey · 2022-09 · on “Interest in heat pumps has increased dramatically in recent years”
Matt Risinger explains how and why he put an ERV in his house in this episode of The Build Show [this video] . It seems to be the thing to do of late in to help with air exchanges and still meet the passive house standards.
Cites rudedogg · 2020-10 · on “Ask HN: Best HVAC system for a new house?”
> Radiant floor heating and radiant cooling zones are also in. And run water through Your floors to heat or cool zones. It is one of the most efficient ways to heat a structure and feels good as well. I think/thought radiant cooling is still pretty "experimental". I think in certain climates it can cause the pipes to "sweat" a lot. If you want to see some ultra high-end stuff, you can check out this YouTube channel: [this video] Here's their video on radiant cooling ( [LINK] ). Not sure how to word this - but my understanding is that the stuff on his channel is pretty cutting-edge. Most builders use older/time tested materials and methods. You may get weird looks if you start asking your contract
Cites throw0101a · 2021-08 · on “Scientist says cleaning indoor air could make us healthier and smarter”
* Do try to get an HRV/ERV if you live in places where the outside air temperature gets >30C or <10C. Otherwise bring in fresh air will cause issues. * Make sure your system can handle MERV16 filters: they catch more things, but may create more back pressure, so the system has to be designed to handle it. Further nice-to-have upgrades would be HEPA capabilities, and (if you live in wildfire zones) charcoal filters (for smoke/fire smells). You don't have to (always) use the finer filters, but having that option is useful. * The filter should ideally be 4"/10cm, as they have more surface area, so reduce back pressure and often only have to be swapped every 6 months (sometimes even every 12). T
Cites throw0101a · 2021-08 · on “Why Don’t Green Buildings Live Up to Hype on Energy Efficiency?”
Ah yes, it seems that the built-in stuff has restrictions, but there are external boxes that can be added: * [LINK] Which allow MERV 16 and even carbon filters: * [LINK] * [this video]