Return ducts used floor/ceiling joist and balloon frame wall cavities for return air. Once the walls were insulated the furnace suffocated and pulled all return air from the basement. The worst case CAZ was -12.3pa causing the furnace to backdraft and the basement to reach 97ppm of CO.

Views: 241

Comment

You need to be a member of Home Energy Pros Forum to add comments!

Join Home Energy Pros Forum

Comment by Joseph J. Ilacqua on November 30, 2012 at 2:50pm

Yes in my location in upstate NY this is a common practice. Even more common while dense packing tuck under garage ceilings. Be carefull and beware. That is why we do constant pre and post job inspections. Sometimes even with a great inspection these can be missed. Learn from someones else's mistakes and try not to make the same one.

Latest Activity

Sean Lintow Sr replied to David Meiland's discussion Air gap above floor insulation--how big is the impact?
"Yes & no - newer codes added in "Exception: As an alternative, the floor framing-cavity…"
1 hour ago
Dan Phillips replied to tedkidd's discussion It is time for government programs to end. They become monopolies that block market solutions.
"Not all states used deemed savings or modeled savings.  Don't throw the baby out with the…"
2 hours ago
Dan Phillips replied to David Meiland's discussion Air gap above floor insulation--how big is the impact?
"I wonder if you could do an experiment.  Leave a section of the floor insulation as is. …"
3 hours ago
Dennis Heidner replied to Tim Kendzia's discussion Cooling effect from solar panels
"I had missed your query originally made a couple of years ago.   Yes it does make a…"
12 hours ago
Dannie Jackson replied to Tom Smith's discussion Are Energy Efficient Windows worth the investment?
"If you look at the R factor of the window and compare it to old school single pain glass windows…"
14 hours ago
Dannie Jackson replied to tedkidd's discussion It is time for government programs to end. They become monopolies that block market solutions.
"Something that bothers me which is very similar to the concerns about agencies and programs…"
14 hours ago
Dannie Jackson replied to Tim Kendzia's discussion Cooling effect from solar panels
"I would assume two things about this idea, first of all you would definitely shade the roof and…"
14 hours ago
Charles Buell replied to David Meiland's discussion Air gap above floor insulation--how big is the impact?
"You want to install enough insulation that the room temp line is within the insulation---not…"
18 hours ago

© 2018   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service