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: 506

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

Jim Gunshinan posted a blog post
59 minutes ago
Kim Tanner commented on Diane Chojnowski's group Home Energy Pros on Twitter
"Follow The Energy Conservatory on Twitter! We'll follow…"
3 hours ago
Kim Tanner joined Diane Chojnowski's group
Thumbnail

Home Energy Pros on Twitter

We've created a twitter list of members of Home Energy Pros who tweet!See More
3 hours ago
Rob Moreno is now a member of Home Energy Pros
4 hours ago
Bud Poll replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Hi Kaushal, First step is to understand where you are in terms of energy costs.  If current…"
6 hours ago
Kaushal Bharath Raju posted a discussion

Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.

We have a small 1940s single level house (1005sqf) in Berkeley, California that is in need of a…See More
14 hours ago
Christopher Morin posted a blog post

5 Things New Energy Efficiency HVAC Contractors Need to Know

1. Do not sell on Price! Use 'Simple Payback'The price of High-efficient equipment will undoubtedly…See More
19 hours ago
David Eggleton commented on David Eggleton's group Considering Permaculture &/or Transition
"In August 2014, in Minnesota, there's another unprecedented opportunity to meet and mix with a…"
yesterday
Glen Gallo commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"Nate, RE: Duct test On my own home and a rental I have tested more than once over the last many…"
yesterday
Profile Iconangela hines and Charles Goldman joined Home Energy Pros
yesterday
Jeff Flaherty joined Diane Chojnowski's group
Thumbnail

Tools of the Trade

A hammer and a saw used to be the key tools for home contractors. Today, the best-in-breed also use…See More
yesterday
Jeff Flaherty joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service