BPI does not consider fireplaces or wood stoves to be combustion appliances.  Yet they produce CO and can backdraft fumes into a house. 

 

Obviously you can't perform a spillage, CO, or draft test on a fireplace, and you wouldn't want to run a blower door or duct blaster soon after having a fire in a wood stove or fireplace. 

 

But what do you think would be a good worst case depressurization limit for a fireplace or wood stove?  -5 pascals, same as a natural drafting furnace or boiler?

 

Anyone ever do a spillage, CO, or draft test on a wood stove?

 

What have you done or recommended if a fireplace or wood stove backdrafts under worst case or natural conditions?

 

 

 

Tags: Backdrafting, CAZ, depressurization

Views: 718

Reply to This

Replies to This Discussion

I think a WCD of -5pa is pretty reasonable, but like Adam I would love to see some data!
The guys at the energy conservatory did some work on this a number of years ago. As I recall, 6 Pascals is enough to backdraft an operational fireplace. BPI does consider fireplaces and woodstoves CAZs.
Couple of things, though. 1. The worst part of a fireplace fire is at the end of the burn, when the chimney is cooling, and combustion is incomplete. Those romantic embers can be deadly. If a fireplace or woodstove backdrafts at the beginning, people usually don't like the smoke and open a window, which may or may not help.
2. I think you have to consider a fireplace or woodstove as a serious participant in sucking the air out of the house for worst case depressurization. I use the blower door to draw 250 to 300 cfm out of the house along with all the other exhaust appliances. No, I don't start a fire and see what happens!
Wow that is interesting, running the blower door at 250 to 300 cfm to simulate what the real worst case would be like with a fire in the fireplace or wood stove.

BPI may consider fireplaces and wood stoves to be CAZs, but they don't have any depressurization limits or action levels to implement for them. So as far as BPI goes, you could have a house with a worst case depressurization of -10 pascals and a fireplace or wood stove, and it would pass with flying colors with no requirements or recommendations to fix anything.

RSS

Videos

  • Add Videos
  • View All

Latest Activity

Profile IconJeffery Liang and Ellen Phillips Soroka joined Home Energy Pros
Friday
Charles Cormany added a discussion to the group Job Board
Thumbnail

Energy Efficiency Incentive Program Manager - Efficiency First California (Berkeley)

Position Title: Program Manager Terms: Full time, available immediatelyAbout Efficiency First…See More
Thursday
Charles Cormany joined Diane Chojnowski's group
Thumbnail

Job Board

This group is for posting jobs related to all aspects of the home performance industry including…See More
Thursday
Linda Wigington liked Home Energy Magazine's blog post Art Rosenfeld's Legacy
Thursday
terry nordbye added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Combustion anaylizer Testo 310

This little beauty only has a few hours on it. Almost brand new in box.Sell: $350.Terry 415 669…See More
Thursday
Barbara Smith's video was featured

Indiana HCA...On Location - Celebrating 40 Years of the Weatherization Assistance Program (WAP)

The Indiana Housing and Community Development Authority (IHCDA) interviewed two clients of Weatherization Assistance Program (WAP). Both homes were weatheriz...
Thursday
Home Energy Magazine's blog post was featured
Wednesday
Profile IconEfficiency First California and Kevin Daly joined Home Energy Pros
Wednesday

Home Energy Pros

Welcome to Home Energy Pros – the unique digital community by and for those who work in the home energy performance arena.

Home Energy Pros was founded by the developers of Home Energy Saver Pro (supported by the U.S. Department of Energy) and brought to you in partnership with Home Energy magazine.  Home Energy Pros is sponsored by the Better Buildings Residential Network. Please honor our Guidelines

© 2017   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service