Alan Lehman
  • Carmel, CA
  • United States
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Zehnder Comfopipe vs. rigid pipe

Started this discussion. Last reply by Alan Lehman Apr 28. 6 Replies

Hello All,I have installed few Zehnder systems and I am not sure if my rep is giving me the info I need or the info that helps me buy more foam piping from him. The large ducting (7" Comfopipe)…Continue

 

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Latest Activity

Alan Lehman replied to Gary Hall's discussion HERS score with HRV
"Holy dog chasing his tail, Batman."
Jun 7
Alan Lehman replied to Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
"Thanks for your feedback and information. I will be making adjustments in the future when I am running in conditioned space."
Apr 28
David Butler replied to Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
"@Alan, I see you're located coastal California so there's no chance for any condensation on any supply runs inside the thermal envelope, so uninsulated metal pipe is fine for all house side ducts -- supply and exhaust. Brennan's…"
Apr 26
Alan Van Zuuk replied to Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
"ComfoTube is insulated, but like R-8 flex duct insulation it may not have enough R-value for some situations. The other big problem with ComfoTube is it isn't large enough for the airflows in a lot of systems. Based on Lifebreath duct design…"
Apr 26
Cody Farmer replied to Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
"It's a good question and certainly saving ComfoPipe is a good thing. The ComfoPipe is Insulated R-7 and non-conductive. I wish it were available somewhere else. Flexible Insulated spiral duct sadly will sweat like tin on some days unless…"
Apr 26
Cody Farmer liked Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
Apr 26
Brennan Less replied to Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
"Also, if it's exceptionally cold outside, you could have a supply air temp into the living space that is below the dew point. For example, if it were 70F inside and -30F outside and you have a sensible efficiency of 70% (Zehnder is higher, I…"
Apr 26
Brennan Less replied to Alan Lehman's discussion Zehnder Comfopipe vs. rigid pipe
"Good questions. I would say that on the "house" side, which is connected to the inlets and outlets in the living space, there should be no need for insulated ducting, if the duct runs are in conditioned space. But the ducts connected to…"
Apr 26
Alan Lehman posted a discussion

Zehnder Comfopipe vs. rigid pipe

Hello All,I have installed few Zehnder systems and I am not sure if my rep is giving me the info I need or the info that helps me buy more foam piping from him. The large ducting (7" Comfopipe) coming off the unit  at the 4 ports for supply (fresh and to house), exhaust to exterior and from interior). Which are most critical to be insulated piping. If my supply from the ERV is running through a conditioned space, would a sheet metal duct without insulation gain condensation? Would the exhaust…See More
Apr 24
Diane Chojnowski left a comment for Alan Lehman
"Hi Alan, Welcome to Home Energy Pros. Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for…"
Apr 24, 2017
Alan Lehman is now a member of Home Energy Pros Forum
Apr 24, 2017

Profile Information

Company
Lehman Design Studio
Role in Home Performance Marketplace
Architect / designer, Contractor: general (new/remodel)
Website URL
http://www.lehmandesignstudio.com
Facebook Page
https://www.facebook.com/Lehman-Design-Studio-123725144370564/

Comment Wall (1 comment)

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At 10:25am on April 24, 2017, Diane Chojnowski said…

Hi Alan,

Welcome to Home Energy Pros. Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you!

Don't forget to upload your profile photo.

Thanks!
Diane, HEP Moderator

 
 
 

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John Carton posted a discussion

Insulation touches underside of roof in home with no soffit or soffit venting.

I performed an assessment for a recent home buyer and the home inspector they hired when they…See More
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