dcsimg
Self Help Forums

Go Back   Self Help Forums > Building > Building Codes - Residential
Register FAQ Members List Calendar Today's Posts

Building Codes - Residential International Residential Code 2000 or 2003

Reply
 
Thread Tools Display Modes
  #1   IP: 70.168.46.171
Old November 27th, 2009, 11:41 AM
Globeguy Globeguy is offline
Junior Member
 
Join Date: Nov 2009
Posts: 3
Default Venting range hood into chimney

Good afternoon,

I have a townhome that has a non-venting range hood, I want to vent this thing so that I can expel odor, grease and moisture from cooking outside. However in the shortest route to the exterior wall, there is a chimney in the way. Can I vent my range hood to the chimney flue without a problem?

My concerns are:
1. Downward draft causing the odors and grease to travel downward toward the fireplace, but I'm not sure if this is a possibility or not.
2. Having the chimney flue outlined in grease and getting a spark that can cause chimney fire...however fireplace is in the basement, kitchen is in the 1st floor. Could a spark be alive through over 7 feet of travel in the chimney flue?

Thanks in advance!
Reply With Quote
  #2   IP: 75.110.94.120
Old November 27th, 2009, 04:57 PM
pushkins's Avatar
pushkins pushkins is offline
Senior Member 'Self Help Master'
 
Join Date: Oct 2003
Location: Living in, not from North Carolina
Posts: 1,423
Send a message via Skype™ to pushkins
Default

Absolutely without a doubt the answer is NO. You cannot cut into a chimney flue and you most certainly cannot do it with an over the range hood.
The risks you face are not just fire although that is a huge risk but gasses not being expelled from the fireplace correctly.
+ sparks can travel for hundreds of feet.
__________________
Reply With Quote
  #3   IP: 12.10.132.124
Old November 30th, 2009, 09:49 AM
tuilou tuilou is offline
Junior Member
 
Join Date: Nov 2009
Posts: 1
Default RE:Venting range hood into chimney

I have a similar question, but my chimney is no longer in use. It is an older house, and this chimney was likely used for coal burning to heat the house. It extends down intothe basement and has no hearth or opening.

Would you still advise against ducting an exhaust hood into it? Thanks for your input.
Reply With Quote
  #4   IP: 75.110.94.120
Old November 30th, 2009, 02:19 PM
pushkins's Avatar
pushkins pushkins is offline
Senior Member 'Self Help Master'
 
Join Date: Oct 2003
Location: Living in, not from North Carolina
Posts: 1,423
Send a message via Skype™ to pushkins
Default

Yep, I sure would advise against it, the problem really comes when you sell the property, say the new owner wants to revamp that fireplace to be a wood burning one, the new owner hasn't a clue that you ducted an exhaust into the chimney. These sorts of things are not just to protect you they are there to help protect the next owners and then the next..etc...etc...
Now having said that, I saw a job site here that did just that, vented an exhaust into a chimney and was passed by the inspector , the deal was though the fireplace had to be permanently sealed shut and the exhaust line had to have it's own flue inside the chimney all the way to the top.
__________________
Reply With Quote
  #5   IP: 75.204.171.195
Old December 1st, 2009, 08:59 AM
Wgoodrich's Avatar
Wgoodrich Wgoodrich is offline
Super Moderator

 
Join Date: Sep 2002
Posts: 7,451
Default

I agree with Pushkins. To help back his advice try some selfhelp proving to yourself. Seeing is believing. Go to your favorite resteraunt and check out their exhaust hood outlet. Look to see the build up of grease all around the outlet of their commercial vent hood. Also look on the ground for a catch basin for the grease or see a big circle of grease piled up. Now picture this being done in your personal home, while on a smaller degree the grease build up at the outlet into the air is much less. If you try outletting into the chimney that chimney will be greased soaked in less than a year even in a single family dwelling. The grease is too heavy to reach the outside air before it cakes on the inside of the chimney. This grease is not only an invite to bacteria but also a huge fire hazard if it catches fire.

Wg
Reply With Quote
  #6   IP: 70.168.46.171
Old December 3rd, 2009, 01:30 PM
Globeguy Globeguy is offline
Junior Member
 
Join Date: Nov 2009
Posts: 3
Default

Thanks for all your recommendations. Decided to go around the chimney, added an extra 90 degree elbow and some distance to the ductwork, but I think at the end it was worth it.
Reply With Quote
  #7   IP: 72.39.14.52
Old June 26th, 2011, 10:57 AM
miggs miggs is offline
Junior Member
 
Join Date: Jun 2011
Posts: 1
Default Fireplace vent

hi, i have related issue...i want to vent out my gas fireplace in the basement and to do that, im planning to use a 90 degree elbow right above the fireplace so i'll be able to run a 3 feet duct horizontally, then another 90 degree elbow so i can attached 2 feet duct vertically then another 90 degree elbow that will be attached to the wall opening, is this allowed legally?
thanks
Reply With Quote
  #8   IP: 98.110.148.212
Old August 27th, 2011, 09:23 AM
mrpat mrpat is offline
Junior Member
 
Join Date: Aug 2011
Posts: 1
Default an additional question

I have a similar situtation where the stove is on an interior wall. The chimney is directly behind it.
Since I am having the chimney Linned with a stainless steel vent for the furnace and hot water heater could I run a second ss liner just for the range hood through the now non functioning chimney? there will be a cap now on top of the chimney. if this is allowd should I put in a damper for any back draft?
Reply With Quote
Reply






Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 11:30 PM.


Powered by vBulletin® Version 3.6.7
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
© 2002 - QuinStreet, Inc.
http://www.selfhelpforums.com