randynavarro Posted February 25, 2010 Report Share Posted February 25, 2010 For purposes of combustion and dilution air, is a garage with an ordinarily installed gasketed garage door a confined space or unconfined space? Link to comment Share on other sites More sharing options...
Chad Fabry Posted February 25, 2010 Report Share Posted February 25, 2010 Without soffit vents, or if the ceiling is dry walled, I consider it a confined space. Link to comment Share on other sites More sharing options...
kurt Posted February 25, 2010 Report Share Posted February 25, 2010 Doesn't your area link the definition to a maximum btu output? Chicago (Peoples Gas) indicates 150,000btu as the max. allowable, then pretty much anything without direct air communication is called a confined space. Link to comment Share on other sites More sharing options...
randynavarro Posted February 26, 2010 Author Report Share Posted February 26, 2010 Doesn't your area link the definition to a maximum btu output? No. I've never come across any rule or reference like that. Another head scratcher for me: suppose the math shows the appliances need 4500 cubic feet of air and there's about 4700 cubic feet of air in the garage but the garage is confined. Is that acceptable? Link to comment Share on other sites More sharing options...
Brandon Whitmore Posted February 26, 2010 Report Share Posted February 26, 2010 Another head scratcher for me: suppose the math shows the appliances need 4500 cubic feet of air and there's about 4700 cubic feet of air in the garage but the garage is confined. Is that acceptable? Depends, who did the math?[:-slaphap Link to comment Share on other sites More sharing options...
Marc Posted March 1, 2010 Report Share Posted March 1, 2010 Another head scratcher for me: suppose the math shows the appliances need 4500 cubic feet of air and there's about 4700 cubic feet of air in the garage but the garage is confined. Is that acceptable? I wouldn't worry about it. I doubt any garage door would produce an ideal air seal when it's in the closed position because there's no need for anyone to manufacture such a model. Who air conditions the garage? The drafts will likely provide enough combustion/dilation/ventilation air, unless it is a 199,000 btu/hr on-demand unit. Marc Link to comment Share on other sites More sharing options...
JEuriech Posted March 1, 2010 Report Share Posted March 1, 2010 When I run into a borderline situation. The first thing I look for, are signs of previous incomplete combustion. Did you see any signs of excess soot as an example, on the vent pipes or draft hood? Jeff Link to comment Share on other sites More sharing options...
Phillip Posted March 1, 2010 Report Share Posted March 1, 2010 This is todays inspection, water heater and furnace in the garage. Click to Enlarge 35.59 KB I know its wrong. Link to comment Share on other sites More sharing options...
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