Greetings.  This is my first post/question - many more to follow, I'm sure. 

I live in a rental house that has radiant floor heat and a heat recovery ventilator that pulls warm, moist air out of the baths, kitchen, and laundry room and blows outdoor air warmed through the heat exchanger into the living spaces of the house. 

The  fan started making a high pitched noise this week, so I called and they sent out a service guy (plumber).  The air exchange unit is located in the attic against a south facing wall.  The attic is not heated, but the attic is included within the building envelope (insulation against the roof). 

The plumber, after a bit of effort, pulled out the central core of the exchanger - it looks like a pentagon or hexagon prism with zig-zag filter around the perimeter (not the fan or fan motor).  It was frozen - obviously moisture had gotten in and then the cold make up air froze it.  It's been well under freezing here for several weeks.  The plumber said the ice was restricting the airflow causing the fan motor to work harder.

The plumber changed two small rectangular air filters where the ductwork enters the HRV, put everything back together, turned the fan on, and the sound was gone.  He said the system would be fine. After he left, I checked the air blowing into the house, and it felt like air conditioning - which I really don't need in the dead of winter.

My concern:  When the ice melts, and the water sits within the HRV, will I have a mold problem?

The system looks like it has a light to show that it is frosted up and might auto shut off, but obviously that didn't work. 

Thoughts?  Should I pull the ice core out and let it thaw and dry and reinsert it?  I can live without the air circulation for a couple of days.

Many thanks.

Views: 4096

Reply to This

Replies to This Discussion

It really becomes a what house, what occupancy, what climate question. I like ERVs, but it really depends. What do you want to do with latent heat, expell, keep out, or keep in? You might want both cores, switching between summer and winter.

I'm not sure it makes à huge difference unless the house is crazy tight. The issue is how yoh want/need to manage moisture.

RSS

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Profile IconMichael Sumpter and Bill Gartner joined Home Energy Pros
10 hours ago
Malcolm Jackson joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
13 hours ago
Amber Vignieri liked tedkidd's discussion What if more efficient homes were actually worth more?
16 hours ago
Amber Vignieri posted a blog post
17 hours ago
Eric Kjelshus replied to Rob Madden, Solar Home Broker's discussion Indoor Air Quality Monitors and Meters
"I have been using air advice for 5 yr or so - I end up with a report in 35 min I can e-mail or show…"
19 hours ago
Profile IconShane Matteson, Jay Cooper and Mike Harris joined Home Energy Pros
yesterday
Kim Burnett commented on Diane Chojnowski's group Home Energy Pros on Twitter
"Good morning, would you please add me. Thank you. Kim Burnett A+ Abundant Energy Experts"
yesterday
Kim Burnett joined Diane Chojnowski's group
Thumbnail

Home Energy Pros on Twitter

We've created a twitter list of members of Home Energy Pros who tweet about home performance and…See More
yesterday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service