Hello All,

We are working on a project with Habitat and our trying to provide recommendations for ventilation. We would like to see them install a Spot ERV like Panasonic's Whisper Comfort, but the small (<1,500sf) home (4 bdr) requires just over 50cfm fresh air. The Panasonic can only provide 40cfm continuous and installing two brings the incremental cost over an air cycler strategy or supply ventilation strategy too far off budget.

Does anyone have any experience / recommendations for how to best address this situation?

We are in Climate Zone 4, in Middle Tennessee, mixed-humid.

Thanks for any information!

Stefan

Tags: 62.2, ERV, ashrae, ventilation

Views: 522

Reply to This

Replies to This Discussion

Buy a larger one & use a timer - trust me when I say you do not want them running 24x7, especially in a humid enviroment

Sean, help a cold-climate guy out here... what's the issue with humidity and 24/7 run-time?

The humidity inside rises to much & in small houses where the AC unit is oversized because we cant buy a small enough unit...

There are a couple of pretty nifty choices from Venmar.  The Kubix unit comes in either an HRV or ERV version.  It uses 60 watts, 77% Apparent Sensible Effectiveness (ASE).  It's like a 16" cube using 4" ducting.  A more energy efficient alternative is the EKO version.  The ERV version is 73% ASE.  It uses between 26 and 37 watts with flows up to 84 cfm.  It doesn't require a drain in the ERV version.

These are not ceiling mounted units like the Panasonic, but I think getting the supplies and exhausts separated is a better way to go if possible.

I also work with Habitat and like yours, our houses have oversized units because of the extreme tightness, low UA numbers and limitations on ASHP systems.  We use a cycle timer and motorized damper for supply air ventilation. We are also considering ERV/HRV but before choosing and ERV I would have to ask if the manufacturer  can supply a certification that the latent energy (water) recovery does not include any VOC, airborne pathogens or aerosols from toilets. My request to Venmar got circled back to our sales rep who was unsure if such a certification was required.

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Steven Lewis replied to William Fisher's discussion Can tankless water heaters provide hot water even when the groundwater is fairly cold?
"Look at reducing the ambient humidity in the home.  The dew point is the key to the…"
10 hours ago
Olivia Taylor posted blog posts
20 hours ago
norman farwell replied to Bryan Pringle's discussion Dense packed cellulose in basement?
"Ha, we're on the same wavelength.  That's the big question--I'm still thinking…"
yesterday
Bryan Pringle replied to Bryan Pringle's discussion Dense packed cellulose in basement?
"Thanks Norm, we'll have a couple of case studies when all is said and done. Just curious, do…"
yesterday
norman farwell replied to Bryan Pringle's discussion Dense packed cellulose in basement?
"Bryan,  I am trying the same thing for most of the same reasons and also against advice to the…"
yesterday
Morgan M Audetat commented on Sean McLoughlin's blog post Programming in-floor electric radiant heat, is it worth it?
"You would need a large bathroom to see the difference. We install them both ways depending on the…"
yesterday
Dennis Heidner commented on Sean McLoughlin's blog post Programming in-floor electric radiant heat, is it worth it?
"The key is that this is the bathroom.  Occupancy is not constant.  It is more likely used…"
yesterday
Charles Cormany commented on Sean McLoughlin's blog post Programming in-floor electric radiant heat, is it worth it?
"I have seen resistance floor heaters add nearly $100 per month to an electric bill. Since most…"
yesterday

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service