dsc3507
I want to install a 10KW unit and an ideal location based on natural gas and power feed is on one side of my home. Unfortunately the house has many windows and it would be very difficult to position the generator completely away from a window. What is the general rule on this. I know specific areas may have differing rules but is there a rule of thumb? Can the exhaust be directed in a specific direction or extended away? And no, I would not have the window open but unfortunately the rules are to protect those with no common sense.
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Grady22
I believe that the generator has to be 5 feet from any opening in the house, door, window, foundation vent, soffet vent, etc.
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Skip Douglas SkipD
Grady22;10239 wrote:
I believe that the generator has to be 5 feet from any opening in the house, door, window, foundation vent, soffet vent, etc.
That is per NFPA 37.

dsc3507 - There used to be a Generac publication, 0G6108, that defined all the required clearances per NFPA 37. However, I cannot find a copy online for the OP. The link to that document in Ziller Electric's repository that I published some time back no longer works and Kelly is on vacation until next Wednesday so I cannot ask him where to find it.

I would suggest calling Generac to locate a copy of 0G6108 or whatever may replace it.
Skip Douglas
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genme
Skip, is this the one you're looking for? I downloaded it from a prior post of yours, I believe.

Edit - From what I have read here, most people recommend at least 36" between the unit and the wall.
Model 5875, Nexus controller, 999cc Engine, 20kW LP, 2011
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Skip Douglas SkipD
That's the one. It's a bit old and I don't know if the info is what's in the current version of NFPA 37 but it's the best I have available now.

If I were still working, I could access the actual NFPA 37 but I don't have the right to do that now and don't want to pay the fee to be able to.
Skip Douglas
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dsc3507
Thanks for the info. Is that 5 feet horizontally or 5 feet measured from the unit to any point of the opening? I am now thinking of mounting it on the property line which is about 7-8 feet from the building but then that might be another issue. Do local ordinances often superseded NFPA 37 making it tougher?
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dsc3507
I did a search for NFPA 37 and it appears THIS document from Generac might answer the question - [url]http://www.mygenerac.com/News/File/0G6108AircooledOffset72607.pdf[/url]
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dsc3507
Also - how about separation from a gas meter. There seems there may be a differing of opinion on this locally also. I have had two heater contractors out for an AC estimate and one told me 10 feet, the other 12 feet for separation from a gas meter and AC compressor. When I went on the South Jersey Gas website it specifically states 3 feet for AC compressors but does not mention generators. Do local codes just arbitrarily make codes tougher and expect installers to get their wallets out???!!!
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Skip Douglas SkipD
dsc3507;10299 wrote:
Thanks for the info. Is that 5 feet horizontally or 5 feet measured from the unit to any point of the opening? I am now thinking of mounting it on the property line which is about 7-8 feet from the building but then that might be another issue. Do local ordinances often superseded NFPA 37 making it tougher?
The document from Generac is fairly clear on how to measure clearances. However, I'd suggest that you check with your building inspector for the final word on location. Local ordinances could require greater separation than NFPA 37, of course.

I don't think that any local ordinances would require that an engine be closer to a building than NFPA 37 if that's what you are asking. However, there may be minimum required setbacks from the property line. That, of course, is a totally separate issue from the NFPA 37 requirements.
Skip Douglas
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dsc3507
No, my comment was possible stricter local ordinances with no apparent basis. If NFPA or the local gas company has a rule you would damn well think it was well thought out and safe. What I would not understand is why or how a local, and less knowledgeable person or group, would arbitrarily make it stricter just for good measure.
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genme
Someone here recently had neighbors complaining about generator noise. Just wanted to mention this since you mentioned getting close to the property line.
Model 5875, Nexus controller, 999cc Engine, 20kW LP, 2011
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