Old Kitchen Brick Exhaust

MichaelWayne_71 · 11-06-2007, 08:56 PM

Hello All,

I have a 90yr old 2-story home with an old brick exhaust that currently has a 6inch "flex" pipe inside that is venting the furnace from the basement.

I need to vent my kitchen rangehood through the same exhaust...and would like to know if i can tie into the existing "flex". My concerns would be losing the bottom of the flex when i cut into it, tight working space, fire safety (grease into same furnace vent), & pipe size for 500cfm hood.

I have been told by plumbers that range exhaust can go down to 3inches...if this is true, I could probably cut a hole into the side of flex and seal it somehow. Is this possible & safe?

Any help is appreciated!!!

Tks

Marlin · 11-06-2007, 11:06 PM

It's defiantly possible and pretty easy to do.
Unfortunately it's also dangerous and violates every plumbing code.

MichaelWayne_71 · 11-07-2007, 12:45 AM

Can you elaborate? What are the precations, etc...

Thanks for the reply!

bearpaw · 12-02-2011, 06:28 PM

what is the best roof cap for my rangehood

bob22 · 12-03-2011, 09:58 AM

Michael,
I see no way that a range hood and furnace vent should share the same piping. You could get back-drafting of carbon monoxide from the furnance into the home via the range hood line and kill everyone.
Can you punch a vent line from the range out the sidewall?
Bearpaw: start your own thread please.

pigdog · 12-03-2011, 10:22 AM

If you are just wanting to share the same chase, that would be okay, but to tie both together is inviting a CO disaster into your life.

11-06-2007, 08:56 PM	#1
MichaelWayne_71 Newbie Join Date: Nov 2007 Posts: 6	Old Kitchen Brick Exhaust Hello All, I have a 90yr old 2-story home with an old brick exhaust that currently has a 6inch "flex" pipe inside that is venting the furnace from the basement. I need to vent my kitchen rangehood through the same exhaust...and would like to know if i can tie into the existing "flex". My concerns would be losing the bottom of the flex when i cut into it, tight working space, fire safety (grease into same furnace vent), & pipe size for 500cfm hood. I have been told by plumbers that range exhaust can go down to 3inches...if this is true, I could probably cut a hole into the side of flex and seal it somehow. Is this possible & safe? Any help is appreciated!!! Tks

11-06-2007, 11:06 PM	#2
Marlin Member Join Date: Aug 2007 Location: Long Island, New York Posts: 647	Old Kitchen Brick Exhaust It's defiantly possible and pretty easy to do. Unfortunately it's also dangerous and violates every plumbing code.

11-07-2007, 12:45 AM	#3
MichaelWayne_71 Newbie Join Date: Nov 2007 Posts: 6	Old Kitchen Brick Exhaust Can you elaborate? What are the precations, etc... Thanks for the reply!

12-02-2011, 06:28 PM	#4
bearpaw Newbie Join Date: Dec 2011 Posts: 3	Old Kitchen Brick Exhaust what is the best roof cap for my rangehood

12-03-2011, 09:58 AM	#5
bob22 Member Join Date: May 2008 Location: Near Philly Posts: 1,957	Old Kitchen Brick Exhaust Michael, I see no way that a range hood and furnace vent should share the same piping. You could get back-drafting of carbon monoxide from the furnance into the home via the range hood line and kill everyone. Can you punch a vent line from the range out the sidewall? Bearpaw: start your own thread please.

Old Kitchen Brick Exhaust