• Welcome to The Building Code Forum

    Your premier resource for building code knowledge.

    This forum remains free to the public thanks to the generous support of our Sawhorse Members and Corporate Sponsors. Their contributions help keep this community thriving and accessible.

    Want enhanced access to expert discussions and exclusive features? Learn more about the benefits here.

    Ready to upgrade? Log in and upgrade now.

Range Hood tied into general exhaust.

Does NOT appear to comply

2012 IMC 505.1 independent system required
 
Last edited by a moderator:
mark handler said:
And the way you designed it the kitchen exhaust would blow into the bathroom.
Click to expand...
In some instances, the kitchen exhaust odors are preferable to those of the bathroom.

I agree not permitted.

Interestingly, the "independent system" is new to the 2012 edition. Although I believe this has been the intent all along.
 
mark handler said:
And the way you designed it the kitchen exhaust would blow into the bathroom.
Click to expand...
It is an inline fine so it will be drawing from all inlets at the same time. No way to blow into the bathroom

I "know" it is wrong in per code and I believe it is a bad design
 
The inline fan "pulls" air through the hoods and toilet room exhaust opening, no blow through from hoods.

Some system issues:

Handler is correct, independent system is required for domestic range hood separate from environmental air exhaust.

With engineering design, the hoods can be combined as a single system. However, air balancing will be required so additional volume control damper required for each hood.

User convenience will be an issue for controlling when either hood will run, independent system recommended for each hood so controls are simplified.

Fan failure will cause both hoods to be inoperable, independent system recommended for each hood for user convenience during repairs or maintenance.

No backdraft damper for the restroom exhaust.
 
The inline fan "pulls" air through the hoods and toilet room exhaust opening, no blow through from hoods.

Some system issues:

Handler is correct, independent system is required for domestic range hood separate from environmental air exhaust.

With engineering design, the hoods can be combined as a single system. However, air balancing will be required so additional volume control damper required for each hood.

User convenience will be an issue for controlling when either hood will run, independent system recommended for each hood so controls are simplified.

Fan failure will cause both hoods to be inoperable, independent system recommended for each hood for user convenience during repairs or maintenance.

No backdraft damper for the restroom exhaust.
 
have not seen an inline before in a system

So does the inline run 24 hours a day???
 
have not seen an inline before in a system

So does the inline run 24 hours a day???
 
Is the inline fan listed for use on the hood system? my first though that FanTech unit is see on bathroom my not be listed to be used for the kitchen
 
So where does the makeup air come from? In Fantech's system the first page says: "Makeup air system -- What goes out must come in.", in a builder's magazine a Fantech advertisement elaborates on that and says: "What goes out, must come in, so says the building code."
 
mark handler said:
It is posted in the Residential Mechanical Codes forum
Click to expand...
Yes, but the drawing shows a break room in addition to a kitchen and restroom. I've never seen a home with a breakroom in it so based on that I'm guessing this is a commercial application. In which case many other things come into play.
 
Msradell said:
Yes, but the drawing shows a break room in addition to a kitchen and restroom. I've never seen a home with a breakroom in it so based on that I'm guessing this is a commercial application. In which case many other things come into play.
Click to expand...
I saw that. But also says "domestic" hoods.

I still would not allow it
 
Last edited by a moderator:
The jpg in the OP says 'Office Building' at the bottom yet it is posted in the Residential Mechanical section.

So I guess the OP needs to come back and clarify for us.

Perhaps he saw the first responses, realized the arrangement was not compliant and quietly sipped away?
 
JBI said:
The jpg in the OP says 'Office Building' at the bottom yet it is posted in the Residential Mechanical section. So I guess the OP needs to come back and clarify for us.

Perhaps he saw the first responses, realized the arrangement was not compliant and quietly sipped away?
Click to expand...
It also said it was IBC compliant
 
You must log in or register to reply here.
Back
Top