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: 523

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

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Hal Skinner commented on Hal Skinner's group The RCC Classroom (Radiant Control Coatings)
"Kurt, check your emails.  Sent you a friend request you need to confirm then I can send you a…"
49 minutes ago
Kevin Jordan replied to Kevin Jordan's discussion Does anyone have pointers on approaching real estate induatry.
"thank you sir!! If you have any other tips Id appreciate. I am new in this industry and I go and…"
1 hour ago
Bud Poll replied to Kurt Shafer's discussion Where can I find the best radiant barrier to install under my roof?
"Hi Kurt, You mentioned "On a RESNET discussion some insulation experts agreed that insulation…"
2 hours ago
Kurt Shafer commented on Hal Skinner's group The RCC Classroom (Radiant Control Coatings)
"Wow, I am very sad to hear about your eyes.  Would have been super to do that comparison. Good…"
2 hours ago
Hal Skinner commented on Hal Skinner's group The RCC Classroom (Radiant Control Coatings)
"My dads house has an attached garage.  It was converted to living space around 20 years…"
2 hours ago
Kurt Shafer commented on Hal Skinner's group The RCC Classroom (Radiant Control Coatings)
"Hal, do I see a terrific chance for you to show us all the power of your RCC? Your father's…"
3 hours ago
Hal Skinner replied to Kevin Jordan's discussion Does anyone have pointers on approaching real estate induatry.
"Kevin, Several years ago I worked closely with a general contractor and a real estate…"
3 hours ago
Hal Skinner commented on Hal Skinner's group The RCC Classroom (Radiant Control Coatings)
"That same RCC, used as paint on the ceiling of living space, will do the same as if it was applied…"
4 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service