Home Built Enclosure for Portable Generator (the Details)

[rrbasch]

Bigyellow9999... The insulation is FrostKing self stick foam for air conditioning ducting. Since I made this I replaced the right side with an attic fan and louvered gate , I will upload soon this change , the reason was due to somewhat high temps inside when running closed for long time .

The fiberglass in the duct is to insulate the exhaust gases temperature of the engine from the interior and plastic of the enclosure.

[BigYellow9999]

Awesome! I'm planning on building a "quiet shed" as well. What is that inside foil material? I'm guessing it's some kind of soundproofing. At home depot, they sell "soundboard". Not sure if it's better than what you're using.

I theoretically thought something like this would work. Good to see yours in action. And the noise reduction is awesome. Although it's great to have a generator during a power loss, the noise is obnoxious. Why does your exhaust tube have fiberglass in it?

[chopsabong]

My advice is to get a lot more air moving throught that box which ever side the cool air comes in weather blow in or pull in should be at the bottom. I also recoment that you purchase concrete board to line the bottom of that combustable material (plywood) not a good idea. if its summer you really need a lot of air flow these generators need a lot of air not just for the engine but the alternator if you will as well they both get hot especially if its running 50% output or more. which im sure is

[noblinger]

Great idea

[miaskin]

Few points:

Intake should be at the bottom (cooler air and chimney effect). Ideally fans should be blowing on the heated parts to cool them down. There is too much air volume inside for noticeable air movement. I'll opt for less nice looking enclosure from cinderblocks with a better generator instead of the opposite.

[rrbasch]

Txharron73 and also yes the exhaust conduct is just butted against the silencer , the extra fiberglass works as a soft seal .

[rrbasch]

Tcharron73 thanks ! The two fans on the right are exhaust fans , after the last 4 days running I am changing them to 2x700 cfm blowers , because these have proven to be insufficient to exhaust the hot air. I will also add to more left input ports to increase the flow.

[tcharron73]

Great design! You have two ports on the left & right sides of the box. 2 on right appear to be hard wired for airflow where the two on the left look don't. Is that correct? If so, are u pulling air into, or pushing air out of, the box with the hard wired vents? Also, the flex duct you use to slip over the generator exhaust muffler... Is that snug around the muffler or loose? I'd assume you would want it tight to prevent exhaust from staying in the box, but maybe I'm too cautious? Thanks f