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: 531

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.  Home Energy Pros is sponsored by the Better Buildings Residential Network.

Latest Activity

Profile IconGreg Hannah, Eric Wilson, Zach Stachura and 2 more joined Home Energy Pros
59 minutes ago
Stacy Hunt posted blog posts
5 hours ago
Kirsten Richnavsky added a discussion to the group Building Performance Institute (BPI)
Thumbnail

FREE BPI webinar: OSHA's Confined Spaces Rule Impacts Home Performance Workers

Check out this FREE webinar BPI is hosting on OSHA's Confined Spaces Rule Impacts Home Performance…See More
6 hours ago
SmithWatson posted a blog post

Dealing with the 5 Most Common Furnace and Heating Problems

Most people are reminded of the furnace repair service just when the fall or winter arrives.…See More
12 hours ago
SmithWatson shared Lester Shen's blog post on MySpace
12 hours ago
w d posted a discussion

AERC testing and Solar Grates update

AERC of WCMA has been created to test the effectiveness of window attachments and to design an…See More
22 hours ago
Morgan M Audetat commented on Tom White's blog post Embodied Energy: Minimizing Waste with Off-Site Construction
"What is new…"
22 hours ago
Mark posted events
yesterday

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service