I need some help on deciding on an HRV or and ERV for my new home built in Zone 4 North central Kentucky. I’m a weatherization contractor by trade and I’ve air sealed every single step of the way through my complete build. I however have limited knowledge on HRV/ERVs as I rarely ever find an existing structure that I can get this tight.
I ran a blower door test on my home I’ve been building and I’ve blown 335cfm @ 50Pa on a 2500 sf home. 23,800sf of volume. This gives me and ACH (air change per hour) of 0.83ACH50 if my math is right, and the crawl space is not encapsulated yet so I expect to shave another 35-50CFM on those numbers minimum.
with a house this tight what type of mechanical ventilation system do you recommend? I didn’t expect to get much tighter than 1.5ACH50 so I did not plan to buy a ventilation system, but now I definitely need one to exchange fresh air and remove stale air from the home.
I ran a blower door test on my home I’ve been building and I’ve blown 335cfm @ 50Pa on a 2500 sf home. 23,800sf of volume. This gives me and ACH (air change per hour) of 0.83ACH50 if my math is right, and the crawl space is not encapsulated yet so I expect to shave another 35-50CFM on those numbers minimum.
with a house this tight what type of mechanical ventilation system do you recommend? I didn’t expect to get much tighter than 1.5ACH50 so I did not plan to buy a ventilation system, but now I definitely need one to exchange fresh air and remove stale air from the home.