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: 518

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

Nicole Miller joined James Sayers's group
Thumbnail

Marketing Energy Efficiency

Sharing ideas, tools and examples of promoting energy efficiency to consumersSee More
49 minutes ago
Avi Yashchin posted a video

CleanEdison: BPI Training

Avi Yashchin's former company, CleanEdison, provided education and training for those seeking clean jobs, These services included Exam Prep for Leadership in...
1 hour ago
Glen Gallo posted a video

Red E3 Title 24 Duct test

Total Duct leakage test which this system fails. I do a walk around and point out issues before I test that if were performed the system might have passed.
1 hour ago
Khaled Masri is now a member of Home Energy Pros
1 hour ago
Home Energy Magazine posted a blog post
4 hours ago
Casey Gesell replied to Casey Gesell's discussion Looking for home improvement companies to join our dealer network!
"Hi Patrick, I'd be glad to have a conversation with you about the details on our program. What…"
6 hours ago
Amina Lang posted an event

19th International Passive House Conference at Congress Center Leipzig

April 17, 2015 at 9am to April 18, 2015 at 6pm
The Passive House Standard enables every building owner to benefit from the energy revolution, with…See More
8 hours ago
Don Hynek replied to Luis Hernandez's discussion Non-continuous exterior insulation
"This is a matter of far more than R-values. Average exterior temp, heating load vs. cooling load,…"
yesterday

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service