Combined Kitchen Ventilation ( Continuous+ Intermittent )
Combined Kitchen Ventilation ( Continuous+ Intermittent )
(OP)
Hi
I have a rather large residential kitchen and I already have an Exhaust Kitchen Hood (550 CFM) in there. The kitchen hood will operate intermittently. Would there be an added benefit to adding a Ceiling Exhaust Grill linked to the residence's continuous exhaust system?
If there is an added benefit from this an issue, I'm also thinking about is that any vapors grease..etc remaining in the air would leave a smear on the ceiling around the exhaust grill. Is this true or am I being too cautious?
Best Regards
I have a rather large residential kitchen and I already have an Exhaust Kitchen Hood (550 CFM) in there. The kitchen hood will operate intermittently. Would there be an added benefit to adding a Ceiling Exhaust Grill linked to the residence's continuous exhaust system?
If there is an added benefit from this an issue, I'm also thinking about is that any vapors grease..etc remaining in the air would leave a smear on the ceiling around the exhaust grill. Is this true or am I being too cautious?
Best Regards





RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
Tying up to an existing exhaust system, you will reduce the exhaust flows of the existing exhaust vents already in line and become subject to the irate ranting of the people being affected.
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
Thank you for the response. Don't think a Push-Pull system is necessary on this project.
As for your second comment, the entire project is still undergoing design, nothing has been built yet so the issue you mentioned should not be a problem. So do you recommend this approach? Or is the intermittent exhaust from the Kitchen Hood sufficient for a high level of air quality?
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
but in residential kitchen you need a MAU when you exhaust more than 400 cfm. Not sure what sort of residence that is that you need more than 400 cfm. Unless it is a mansion with servants that cook for elaborate dinner parties....
probably best not to return any kitchen air to the regular building exhaust assuming when you cook you turn on that hood. If you really make that much grease, you don't want to dirty-up your regular exhaust system.
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
Thank you for the response. I am sizing my hood according to 100 CFM per linear foot of range. As for guaranteeing that it will be on I guess that is the owner's responsibility?
HerrKaLeun,
Thank you for theh response. Well you are spot on. It is a mansion with servants that cook for elaborate dinner parties. I do have makeup air, but not through a dedicated MAU, but through the central FAHU.
Chicopee.
Ah now I get you. Can't the odors be avoided if I place Non Return Dampers in the ductowork?
SAK9:
Thank you for the response. That is kind of what I was thinking. But I see that most of the replies don't recommend it. I guess I will do without the Exhaust Exhaust grill especially that the kitchen is in an isolated area.
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
"506.3.5 Separation of grease duct system. A separate
grease duct system shall be provided for each Type I hood.
A separate grease duct system is not required where all of
the following conditions are met:
1. All interconnected hoods are located within the same
story.
2. All interconnected hoods are located within the same
room or in adjoining rooms.
3. Interconnecting ducts do not penetrate assemblies
required to be fire-resistance rated.
4. The grease duct system does not serve solid-fuel-fired
appliances."
I would not interconnect them unless conditions 1 -4 are met.
Also, if the regular exhaust duct has dampers, do not interconnect them. Dampers are not allowed in grease ducts.
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
RE: Combined Kitchen Ventilation ( Continuous+ Intermittent )
Thank you for the response.
trashcanman,
Thank you for the response. That was very helpful insight.
sprinkler1000,
Thanks to you as well for the seconding.
MintJulep,
Thank you for the response. I guess I will look it up.
Best Regards