Mike Lamb Posted January 9, 2012 Report Share Posted January 9, 2012 This will be the termination for a kitchen cooktop exhaust fan. The fan has not been installed or purchased. I'd guess that under a soffit would be a poor choice with smoke, grease and moisture wanting to rise. I pulled up some installation instructions and have seen vents horizontal through walls and straight up through the roof but nothing that specifically prohibits soffit venting or says it's a bad idea. Does anyone have any applicable documents to support my position. Click to Enlarge 42.28 KB Quote Link to comment Share on other sites More sharing options...
Rocon Posted January 9, 2012 Report Share Posted January 9, 2012 I have seen this several times in the past. usually there is a stain on the brick since grease is heavier than the air. Quote Link to comment Share on other sites More sharing options...
John Dirks Jr Posted January 9, 2012 Report Share Posted January 9, 2012 I don't have anything that would suggest it's a bad idea. Furthermore, I doubt that any significant amounts of grease would make it as far as that termination. One thing for sure, pumping it out there is better than pumping it back into the room like we see with so many other installations. Quote Link to comment Share on other sites More sharing options...
Marc Posted January 9, 2012 Report Share Posted January 9, 2012 This will be the termination for a kitchen cooktop exhaust fan. The fan has not been installed or purchased. I'd guess that under a soffit would be a poor choice with smoke, grease and moisture wanting to rise. I pulled up some installation instructions and have seen vents horizontal through walls and straight up through the roof but nothing that specifically prohibits soffit venting or says it's a bad idea. Does anyone have any applicable documents to support my position. Click to Enlarge 42.28?KB Do you mean that the exhaust on this cooking appliance will function as intended without a fan? Marc Quote Link to comment Share on other sites More sharing options...
Mike Lamb Posted January 9, 2012 Author Report Share Posted January 9, 2012 This will be the termination for a kitchen cooktop exhaust fan. The fan has not been installed or purchased. I'd guess that under a soffit would be a poor choice with smoke, grease and moisture wanting to rise. I pulled up some installation instructions and have seen vents horizontal through walls and straight up through the roof but nothing that specifically prohibits soffit venting or says it's a bad idea. Does anyone have any applicable documents to support my position. Click to Enlarge 42.28?KB Do you mean that the exhaust on this cooking appliance will function as intended without a fan? Marc No. The will be fan I'm sure. Quote Link to comment Share on other sites More sharing options...
Jim Baird Posted January 9, 2012 Report Share Posted January 9, 2012 If this is a new installation I guess codes would apply. Here's the 2006 IRC on the subject: M1501.1 Outdoor discharge. The air removed by every mechanical exhaust system shall be discharged to the outdoors. Air shall not be exhausted into an attic, soffit, ridge vent or crawl space. The termination through might pass, but I agree that the potential for grease-laden vapor makes it less than the best. Quote Link to comment Share on other sites More sharing options...
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