Venting smoke through wall

I had a smoke hood built at a sheet metal shop and I am in the process of installing it above my eko. I really can't go out the roof because of space and need to go through the wall. I can find 8" wall vent caps for dryers and range hoods but I am concerned that they would cause the siding on my building to get stained from soot. They direct the smoke down and not out and up. I also need a backdraft flap built into it. Any ideas?

http://www.roofvents.com/categories.php This company has a very interesting wall vent .

Put the pipe through the wall then use a 90

Reduce to 6" before you go out - to give you more options?

My old cobbled one was just 6", seemed to be lots.

I don't think you're going to have soot/stain issues with a smoke "hood". You're not going to be venting that much smoke, at least I wouldn't think.

I have my "exhaust vent" vented through a louvered cap that directs the air down along a section of siding on the back of my house. I only run my blower once in a while when I know I'm loading at a bad time but I've never had any staining issues.

How about one of these? You should be able to find one cheaper.

http://www.grainger.com/Grainger/BROAN-Wall-Cap-4YG80


or if you want to get fancy with another air seal use one of these and power it with the same switch as the fan.

http://www.smarthome.com/307109C/8-...ir-Duct-Damper-with-Power-Supply-ZC108/p.aspx

gg

Better yet take your pick.

http://www.famcomfg.com/wall-vents.html

gg

I use a 4" in-line "Hurricane Fan". Rating on the side says 200cfm. I vented to the outside with a 4" fully stainless steel dryer vent kit. Vent kit has a damper built in. Seal the seams with foil tape. It will suck a piece of paper through the opening in my hood.

Haven't used it yet for reloading but it works well for venting soldering fumes!

....soldering fumes and cleaning the boiler dust!