How to build and design a generator enclosure. 

So what are the final temps you're getting. In Texas I'm getting 130 and my hessair 1100 cfm fan shut down. Added two more fans a 8 inch at 300cfm and another 12 inch at 900 cfm now have 2300cfm also went to a 21 x 21 intake vent but it still gets over 120 of course it could be 100 outside. Need to get the temp down the fans shutting down scares me and gas boils at 168

@@jerryhall4678 Since posting this I upgraded the ventilation system as follows. I have a curved intake and exhaust hood. Noise likes to travel in straight lines and the hoods keep it quieter. The intake hood has a screen to keep insects out and the exhaust has a hinged horizontal door and mesh to keep critters out. I say this because my intake which has no fan was obstructed and restricting air flow. Wall cutouts for air flow are approx 17" x 17" . Both openings in the hood are approx 22" x 18" or 396 in sq. each. These were enlarged since my previous post. I switched to a 16" powered exhaust fan (AC Infinity) and get an air flow currently of about 3,000 cfm. Ambient temp was 79 at the start of a fully enclosed compartment running test. After 90 minutes of operation under load, internal compartment temperature reached a max of 89 degrees. If you can keep the differential between 10 -15F you can't do much better. If you wish you can check out engtips and search generator temperature in an enclosed compartment. That is my install. One more thing I would suggest is to install a cheap bimetallic switch ( cheap on Ebay) and wire it into your low oil level circuit on the generator and if your fans go south it will prevent your compartment from overheating. In my case I bought a N. O. switch set at 50C and it gives me peace of mind. If you buy one for too low a temp your generator will shut off every time. I had to learn this. If you do a search on RU-vid you will see an excellent video that explains how to do this.

I have a similar setup with a 5600w generator and a 2600 cfm fan. When the ambient gets in the upper 90's in Louisiana the generator stator is pushing over 120F. I have added more inlet louves but it hasn't made much help. So I can't run the enclosure with the doors closed during the hot summer (>90F ambient). I am afraid to run over 105 -110F stator temp. Under winter conditions it isn't a problem. I would appreciate any suggestions anyone has.

Glad you are paying attention to temperature levels. I had a long run time recently and the interior thermometer was at 98F. In my case I purchased a 12" fan to install on the inlet side of the compartment which is simply free flowing air. At the end of the day these generator setups are for emergency use only so thery don't see so many hours of operation. That is one saving grace. Having said that it is important to be aware that heat can be a problem and if possible address it as best as you can. @@donaldjeansonne8667