When using the Duct Blaster I have found it necessary to seal the combustion air grilles on the furnace door and flue on an 80% afue gas furnace in order to obtain accurate leakage results. Any comments?

Views: 213

Reply to This

Replies to This Discussion

Far from my expertise, but there should be no connection between the combustion side and the conditioned air side.  The only thing I can think of would be duct side leakage inside the cabinet then accessing the combustion side through the air intake.  Of course there is a possibility of a cracked air exchanger, but not something you would run into on every unit, I would hope.  I'll be watching to see what the pros have to say.

Bud

Damien, if you do that, your results are inaccurate and of course the HVAC guy has an issue to find & fix

The duct test doesn't test just the ducts, but the whole air handling apparatus. The only exception is the version where the air handler hasn't been installed & then they are only allowed 4% leakage per the 2009 codes. With that said many municipalities don't accept that test & we simply won't perform it

RSS

Latest Activity

Chris Dorsi posted an event
Thumbnail

2018 Habitat X Summer National Conference at Big Sky Montana

June 27, 2016 to June 29, 2016
The 2018 Habitat…See More
2 hours ago
Stuart Langley liked David Byrnes's blog post Strategies for Hiring and Interviewing for Home Performance Professionals
6 hours ago
Kevin Miller replied to Bob Krell's discussion What Do You Do When You Find Suspected Mold? in the group Healthy Indoors (IAQ)
"Visual inspection can only confirm the presence of mold, not the absence.   That said,…"
9 hours ago
Armand C Magnelli replied to Don Fugler's discussion joining ducts in the group HVAC
"I often suggest pop-rivets as an alternative to sheet metal screws for both clothes dryer duct work…"
9 hours ago
Kevin Miller replied to Bob Krell's discussion What Do You Do When You Find Suspected Mold? in the group Healthy Indoors (IAQ)
"Sampling would be primarily to verify 'Condition 1' or 'Normal Fungal Ecology'…"
9 hours ago
Daniel Cullen joined Building Performance Institute's group
Thumbnail

Building Performance Institute (BPI)

BPI is the nation's premier standards development, quality assurance and credentialing organization…See More
9 hours ago
Daniel Cullen replied to Bob Krell's discussion What Do You Do When You Find Suspected Mold? in the group Healthy Indoors (IAQ)
"Can anyone tell me exactly HOW mold sampling impacts the mold remediation process or protocol? Why…"
9 hours ago
Daniel Cullen joined Bob Krell's group
Thumbnail

Healthy Indoors (IAQ)

The Healthy Indoors group is focused on indoor air quality (IAQ), mold, moisture control, radon,…See More
9 hours ago

Photos

  • Add Photos
  • View All

© 2017   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service