Quote:
Originally Posted by jyl
Yes, 12” round duct on top. Easiest will be to use two 90 elbows and a 5’ horizontal run to take duct out the exterior wall, then mount a sideblast fan to the side of the house. It’s the garage side so I don’t much care how it looks. Inline fan is also possible, it will be on the other side of the wall. I haven’t calculated the CFMs. Specs say all ductwork has to be welded but I’m going to ignore that, this will see 1% of the use and grease that it would see in a commercial setting.
|
Right. Welded ductwork is only for fire code. Commercial. Use the best high temp tape. The ducts don't get very warm, but if there was a flash fire it would get sucked up into the duct.
I assume if this ever happened you would visit the garage side.
Also, will you use a damper? If not, when not in use the hood will suck air out of your house like a vacuum. To reduce this, use the correct side vent cover oriented in a way that breezes don't pass by and create a low pressure system at the terminus.
On a windy day, I can feel air leaving the kitchen.
The opposite can be true as well under certain circumstances where wind can want to enter the house. That gets complex so I'll leave it at that.
The right cover is important.
https://inspectapedia.com/BestPractices/Kitchen_Vent_Fan_Specifications.php