DIY Firman Generator Quiet Shed Build & Muffler Install (Homemade)
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- เผยแพร่เมื่อ 28 ก.ย. 2024
- Firman Tri-Fuel Generator Quiet Shed Build T07571 model from Costco. We significantly cut down the noise in this build....See notes at bottom for answers...
These are mostly all the parts I used in this video:
Firman Tri-Fuel Generator T07571: amzn.to/3LMW2Xt
Shed 4x2: www.lowes.com/...
Air Intake Grill 14": amzn.to/3p1vecz
Exhaust Fan: amzn.to/3H3qEkc
Kilmat Sound Deadening: amzn.to/3I7IQdN
ProRox SL Rockwool: amzn.to/3LQrfJp **Make sure you get the 1" THICK - NOT 2". It's hard to find sometimes.
3" Stove Pipe (protects plastic shed): amzn.to/3p3RYsd
Outdoor Weatherproof Outlet Cover: amzn.to/3H3rai8
Generator Exhaust Adapter: amzn.to/3I6WT3c
Flexible Exhaust Pipe: amzn.to/3s3nRmy
(you will need to find an adapter to go from 1" to 2")
Titanium Exhaust Wrap: amzn.to/33DLKrG
Exhaust Joint Clamps: amzn.to/3Ha3eJH
Wireless Thermometers/Monitors: amzn.to/3p1yapv
Decibel Meter: amzn.to/3mSFpSs
Generator Cables:
50amp - 30 feet: amzn.to/3GYmKZO
Natural Gas Hose 36 feet: amzn.to/3I6Y5DI
Works with Firman.
NOTES:
** I am an Amazon Affiliate. Links above help support my channel.
And - YES, the airflow is sufficient with the setup I have. Rarely gets used in summer - if at all anyway. No there is not significant heat in temps around 70. Inside the box only got to 88 degrees. The fan is 950CFM. I had to play around with the box openings to find the right balance of temperature, flow, & sound deadening.
Music: Another time
Musician: LiQWYD
Music: Mes(s)merized
Musician: Philip E Morris
I have the same generator from Costco and was able to build a similar shed but not with the side boxes and the car muffler….. now thanks to this video I will add those things soon… Great video!!! Thanks for sharing!!👍👍👍
That’s awesome. I appreciate the feedback. Thanks for sharing!
@@TheRealWorld737 What is the Sound Level in decibels When doors are closed like 10-15 ft. Away from the Generator Shed..❓❓❓
I just did another video with a decibel meter - check it out on my channel.
I like the used muffler idea!
If you further added a layer of light air conditioning duct metal and/of foil around the entire case including the opening for air and exhaust, and a 10foot copper grounding rod connected to #4 copper grounding wire, or just use the house ground from the panel, you have the start of a good Faraday cage for EMF protection. Some great ideas here, Thanks for sharing. Turbo exhaust wrap will solve all your pipe heating problems. Make sure you are earth grounding at least the generator or someone could get shocked ⚡️ always use a grounding conductor that is at least matches the gauge of the largest conductor you use for power delivery.
Great tips! Thank you
Muffler from HarryU pull it - GENIUS!…that’s great…Let Toyota build it , U just mod it…yeah I agree forget the build yr own muffler jazz. its so great that everyone who built these things made the “ I should a done this or that” but we all benefit from those things as you all document your builds.. So thank u and great build. I’m def gonna “borrow” the junk yard muffler idea!
Thank you!
Thank you so much for sharing this video, it's very informative. Ottawa/Canada.
Thank you -
Very informative and most complete set up thank you.
Glad it was helpful!
alot of great ideas here I haven't seen elsewhere. thank you!
Glad you enjoyed it! Thanks for the complement!
Nice job - like the muffler!
Thanks!
Great job. Thanks for sharing. Will use some of these tips. Cheers
Glad it was helpful!
I got a steel shed a bit bigger than yours but i got it that big because i lined the inside walls with sand bags and old trick from army day's it really knocks the sound down from inside the shed dirt is a great muffler
Great idea thanks
Not sure if mentioned already, but did you consider the back pressure that the muffler would introduce on the exhaust valves? Not sure of the mathematical factors, but I have read elsewhere that it could be detrimental to the life of the engine.
There should be no additional back pressure since the opening gets larger beyond the OEM exhaust port (which is about an inch). All the piping, including the muffler is at least .5 to 1.0” larger.
If you route the exhaust upward and above the house, it will be even quieter.
Great idea- thanks.
What is the Sound Level in decibels When doors are closed from the Generator Shed ❓❓❓
I just did an update video on it: UPDATE- Generator Shed Build (DECIBELS).
th-cam.com/video/fc5r6IIrius/w-d-xo.html Basically got it down from 85 to appx 70 at 10-15’.
you might want to put some chicken wire around the bottom of those black sound deadening boxes. first impression was those will become home to some animal.
Excellent tip! I should know that by now… with all the mice and rats I’ve dealt with.
was there a difference between rockwool and backerboard other than better sound proofing?
I think it depends on how it’s installed. My opinion is that they are probably equally effective except these considerations: backerboard could rattle because it’s rigid if there is a chance the mounting hardware could loosen. But that’s nitpicking - since this thing is not exactly quiet to begin with. A little rattle isn’t going to expose its presence anymore than the exhaust. I prefer the rockwool because it’s possible to get a little more overhang in the corners to help muffle some of the sound that could escape through door and wall seam cracks. Again, probably not a major difference. It’s all about layering. The more you do, the quieter it’s going to be. Same with prepping. You may not be able to afford every layer of protection- but the more layers you gather, the better percentage of survival you could have.
Could you use the Kilmat sound deadening material everywhere? I have a small enclosure and don't want to make it smaller with the Rockwool material. I'm also concerned about the walls being too thin to put screws through only one of the layers.
I don’t see why not. Rockwool is hard to find sometimes
Why rock wool instead of foam insulation?
Fire retardant properties. Foam can catch fire or melt.
Excellent video looking to do the same thing, bought a similar generator from Costco about 4 weeks ago. got it started today and wasHow many batts of rock wool did you need?
I had to buy more than I needed because it came in a fairly large pack. (10). But I only needed about 6 I think
It looks like your fan is undersized setting you up for an overheat problem. I went through the learning curve to get it right. I direct you to "Eng-Tips Engineering forums. There input "Generator temperature in an enclosed compartiment". It is an egghead discussion by engineers on this topic and I think you will find it of interest.
Thanks for the suggestion. I appreciate it. This enclosure was tested in temps at or below 70 and had appropriate cooling. I know it will get too hot in summer. I can't imagine someone trying to run one like this in an enclosure during the hot months. I'd just run it outside and let the noise issue go. My power usually only goes out due to winter storms - and if the gov't does rolling brown outs in summer - I'll take it out and run it. Thanks.
Nice set up. I did not know that adding boxes will make a difference in the sound level. I have the same exhaust set up with the exception of the muffler. I will experiment with adding sound boxes at the exterior since I have some spare rockwool left. Thanks for the video.
Thats very nice👍👍
Thanks 👍
Your Shed exhausted fan and the Generator muffler are closed together is good... I Combined them two in Extensions Compartment To Reduce Sound Level further without using the car muffler or any muffler silencer... B.C. people said it doesn't do well in reducing noise level
ONE more week I finish it and will Test How much more in Sound reductions on my project
Good stuff
Thanks Elmer!
Does anyone know if this will defeat the CO2 sensor? Ours keeps shutting the generator off, thanks!
No problems here. This generator doesn’t have a CO2 sensor.
The link for the exhaust adapter does not work for me (shows spark plugs). If you can find it on amazon, can you please give the ASIN (press See more product details )
I just clicked on the link & it showed the adapter. Could be your location or VPN. Here’s the link refreshed that I just copied from a new visit. And the ASIN -
amzn.to/3NgfNHo
B07HBD8BRJ
Do you know what the temperature is inside the box?
I have a remote sensor inside the box. So I can monitor it anytime it’s running. But I do not run this thing in the summer. Because it’s on the sunny side of the house. But to answer your question yes I do know the temperature. And it only got up to about 95° during the cooler months while it was running which is acceptable.
Nice build thanks. I have a Westinghouse 12,500 running on the same propane I use on the grill. Fires right up.
i am considering make the box from old refregerator....
The baffles and the wool big difference 👍👍
hello, how about durability for generator? i think box can hold more heat and can make damage to alternator
The fan and vents are sufficient. Never a problem
I just ordered the same unit (T07571)...the Operators Manual P29/43 show a muffler... (Inspect Muffler and Spark Arrester) Does this model come with a muffler or is that an accessory ? Great video by the way.
Yes, it does have a muffler. But it’s very small and mostly just a spark arrestor. It doesn’t do much. Definitely worth fabricating more muffler. Lots of kits are available. The setup in my video is about as quiet as it will get - aside from the garbage can setup.
You kind Sir, did a great job in reducing noise with your shed. And there is one more thing you can do; that I saw on another DIY'r video on TH-cam a couple of days ago. Where he made boxes outside the shed too. But he did something different in building the boxes..
So he made two compartments box. Where the middle part was half way from the front and back of the box. But, that middle part is not all the way. And if you can think of it; it causes the air to make two 90° changes straight up OR down (from the vent and the fan). And it makes the sound much reduced.
He was a engineer and he said, "Air has no bother when change its direction. But noise does NOT like that all. Especially two 90°'s; in both boxes. And he used DB testers; and the reduction of noise was another 20 DB reduced. And all and all, he made the normal noise reduce 50% for the shed.
I was awesome and fascinated seeing that. IF "TH-cam" would let us use "links" I could let you see how he did it. I believe most would really be amazed.
For when you see it, you won't believe how much noise was muted. One could hardly hear any noise. Really.
Thank you. I did see that. I was confined for space - otherwise that would help a lot.
Another video the guys fan failed and the generator overheated.
That’s why I have the wireless thermometer link in the description. I don’t think I mentioned it in the video - but I keep a sensor inside the box and the monitor in the house. Then, I have the monitor set to alarm if it gets over 95 inside the box. So, obviously you’d have to be home (which I would never run a generator while away from the area anyway). Here’s the link: Wireless Thermometers/Monitors: amzn.to/3p1yapv
Looks good. Nice fine on the muffler.
Some folks put their attic fan up high (theory being since heat rises).
I'm more prone to do what you did, keep it down low (close to the generator level).
What's your opinion about "heat rises" concept used by others.
I agree heat rises, but why not remove the heat (with the attic fan positioned low) before it rises?
Such a small area, high flow, straight through that it’s got tons of cooling regardless of where the fan is positioned
Thanks for the video
Our pleasure!
I was thinking about installing a generator inlet box on the inside of the shed with male connector tied to another inlet box outside the shed with female connector and tie them together to reduce the need for a hole to pass the wire thru.
So I could hook the cord to the outside and then to my inlet box on the house.
Haven’t seen this yet so I’m curious on anyone’s thoughts.
Great video. I marked this one as the one I’d like to build this spring. Many thanks for your time in making it and for the parts list.
Good plan I think
Could have taken the wheels off since you're not rolling this around anyway. A theft deterrent as well, if you bolt it down.
Thanks! Would fit better for sure. I don’t plan to move it unless I have to go with NG. But I could always just put them back on.
Good information, even better if your text blocks were visible twice as long
Yeah- sometimes I miss the mark!! Thanks
Did you take the little screen spark arrestor out when you added the extension?
Yes. Since I’m using a muffler.