Kitchen vent - InspectionNews

#1 (**permalink**) 04-06-2007, 10:36 AM

.........

Jerry Peck · #2 (**permalink**) 04-06-2007, 10:44 AM

No.

The range exhaust is considered to be 'grease laden air' and need to have a cap which has a backdraft damper and is designed such that grease will not impinge on, or accumulate on, the exhaust cap and drip back down into the exhaust duct and below.

All the IRC says is:
- M1503.1 General. Range hoods shall discharge to the outdoors through a single-wall duct. The duct serving the hood shall have a smooth interior surface, shall be air tight and shall be equipped with a backdraft damper. Ducts serving range hoods shall not terminate in an attic or crawl space or areas inside the building.
- - Exception:

Where installed in accordance with the manufacturer’s installation instructions, and where mechanical or natural ventilation is otherwise provided, listed and labeled ductless range hoods shall not be required to discharge to the outdoors.

Michael Thomas · #3 (**permalink**) 04-06-2007, 11:13 AM

I've seen several Vent-A-Hood installations with similar terminations, and something of the sort is shown in their installation instructions for roof jacks.

http://www.ventahood.com/images/docs...r uctions.pdf

Jerry Peck · #4 (**permalink**) 04-06-2007, 11:25 AM

Quote:

Originally Posted by Michael Thomas

I've seen several Vent-A-Hood installations with similar terminations, and something of the sort is shown in their installation instructions for roof jacks.

Not really.

When you look at sketches under "Methods of Ducting Your Vent-A-Hod", they are showing you: up-and-out-through-the-wall, up-and-out-through-the-roof, and up-across-the-ceiling-and-out-through-the-wall.

That is not depicting "the" "roof jack" per se. For that, you need to go to their drawings: "Venting Materials Available from Vent-A-Hood and look at the "roof jack" as shown.

That is the type needed. Don't forget, it states (just above the "Methods" drawings) "Observe All Governing Codes and Ordinances", that is first and foremost.

And the code (the IRC) says:
- SECTION M1307

- - APPLIANCE INSTALLATION
- - - M1307.1 General.

Installation of appliances shall conform to the conditions of their listing and label and the manufacturer’s installation instructions. The manufacturer’s operating and installation instructions shall remain attached to the appliance.

Jerry McCarthy · #5 (**permalink**) 04-30-2007, 06:06 PM

Hey Jerry. ain't you going to talk about the exposed nailing at the vent flashing?

Jerry Peck · #6 (**permalink**) 04-30-2007, 06:42 PM

Quote:

Originally Posted by Jerry McCarthy

Hey Jerry. ain't you going to talk about the exposed nailing at the vent flashing?

Nah, I beat exposed nails to death on another thread recently.

If'n that twasn't good'nuf, I don't know what would be.