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: 499

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

Kurt Shafer replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Graham, what "large fan" are you referring to?  I am fascinated by your comment…"
2 hours ago
Profile IconTom Mallard, Eugene Swier and 2 other members joined Hal Skinner's group
Thumbnail

Radiant Control Coatings

A group where people who work with radiant barrier coatings can let others know all of their uses.See More
4 hours ago
Graham Irwin replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"I think it is important to check the energy consumption of such a large fan, even assuming it can…"
5 hours ago
Hal Skinner added a discussion to the group Radiant Control Coatings
Thumbnail

Rooftop A/C units and exposed ductwork

Lets start a discussion about rooftop A/C units and exposed ductwork. The worst place to put a…See More
6 hours ago
Richard Beyer posted discussions
6 hours ago
Brandon Walton replied to Brandon Walton's discussion EFAZ and APS Hosting Huge Welcome Party!!
6 hours ago
Brandon Walton shared their discussion on Facebook
6 hours ago
Brandon Walton posted a discussion

EFAZ and APS Hosting Huge Welcome Party!!

If your in Arizona on August 20th, stop on by and check it out!APS Home Performance Program Q&A…See More
6 hours ago
Brandon Walton posted an event

Efficiency First AZ is Hosting Huge Meeting August 20th! at Rennick's Restaurant in the Hilton Phoenix Airport Hotel

August 20, 2014 from 5:30pm to 7pm
APS Home Performance Program Q&A w/new leader Maggie Gibbs!Join Efficiency First Arizona (EFAZ)…See More
6 hours ago
Dennis Heidner replied to Jamie Kaye's discussion Flickering LED lights
""CFLs produce light by using electricity to instigate a chemical recation between mercury…"
7 hours ago
Richard Beyer joined Michael Stuart's group
Thumbnail

INFRARED THERMOGRAPHY USERS

This group is dedicated to knowledge sharing and discussion of infrared thermography for building…See More
7 hours ago
Profile IconTomás León, Tauran Ivall, Alex Burnham and 1 more joined Home Energy Pros
8 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service