DIY Generator Shed Build - Quiet Sound Insulation with Exhaust Muffler
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- Опубликовано: 28 июн 2024
- This is a Suncast plastic shed which I have turned into a generator shed/quiet box. I first added air inlets and a fan outlet. Next, I added a flexible metal exhaust pipe to get the hot exhaust out of the shed. I have added Rockwool (ComfortBoard 80) insulation to the walls, Kilmat sound-deadening vinyl to the lid, side baffles for the air inlet/outlet to absorb and redirect the sound, and finally my FrankenMuffler to the exhaust pipe. The FrankenMuffler is a 20 gallon galvanized trash can that has a perforated pipe running down the middle and an outlet on the bottom. The rest of the can is filled with mineral wool insulation, which is excellent at sound absorption and is fireproof to over 2000 degrees F. The exhaust shouldn’t get above a couple hundred degrees. As you can see in the video, this muffler did an Excellent job of deadening the sound! While the rest of the ideas for the shed were dug up from other videos and forums, I haven’t seen anyone take this approach to quieting a generator exhaust yet.
** UPDATE: JUST ADDED:
DIY Generator muffler build - Version 1.0 - The FrankenMuffler Lives!:
• DIY Generator Muffler ...
* NEW!: DIY Generator muffler build - Version 2.0 - The Bride of FrankenMuffler:
• DIY Generator Muffler ...
Links to earlier sound tests for the shed (below)
Generator Shed Sound Test #1 - (No Sound Insulation): • Generator Shed Sound T...
Generator Shed Sound Test #2 - (Sound Insulation Installed, Side Baffles, but no muffler): • Generator Shed Sound T...
Generator Shed Sound Test #3 - (Full sound insulation, side baffles, and muffler): • Generator Shed Sound T...
Disclaimer: This video simply shows what I built, and it is intended to provide a few ideas when building your own shed or muffler. I am NOT an expert builder or designer, so take my advice with a grain of salt, and use common sense in your build.
WARNING: Do NOT build your generator shed near a window or door to your house! CO/CO2 can be deadly, and you do NOT want it in your house in a confined space. Place your generator carefully away from your home. 
Хобби
My HOA would be upset over the actual shed. Love the engineering that went into this.
Hoa. Sheep and their hoa s
Tell your HOA to pound sand…..😂😂😂😂
There's nothing worse then an HOA.
My city would make me get a permit for it lol
Probably the best shed conversion I've seen. Great job and thanks for sharing...
I wish someone would sell them
@@rebellucy5610, Maybe he should ? Of course with everyone being so sue happy, probably need a lengthy anti-sue clause ?
And it would cost over $1k
Just getting to this point for my install so many thanks for the great ideas!
I kept my generator in a shed similar to this. I will never do that again the heat that it creates burns them out sooner than they should.
Overengineering is truly an art and a beautiful art at that...
We just survived 4 days of no power in Tulsa, Ok. Our super loud generator almost drove us crazy and I'm surprised one of my neighbors didn't use it for target practice. Your shed is awesome and I plan on using your brilliant design to build my own. I especially like the pneumatic tire idea. Thanks for sharing.
Make sure you view the follow-up videos (linked in the description) for more info on how I built the shed, parts lists, frequently asked questions, etc. Also keep in mind that this was simply how I built my shed, and is intended to give others ideas on things to try. I am not a generator shed expert, although I am an engineer (in another field). So, take my examples with a grain of salt and good luck on your build.
Very nice! The only thing more impressive than all the engineering you’ve done to sound deaden the generator is the fact that you’re a considerate neighbor! Great work sir!
I bet your neighbors really appreciate the effort you put into this. Sounds great and very quiet.
Or just buy an inverter generator, and it will be nice and quiet, reliable, they provide cleaner energy, and use less fuel. I do none of this and its very quiet.
I definitely wanted to buy an inverter generator, but nobody was building one that was powerful enough for my minimum requirements. Honda and Yamaha did not have enough power, and they were 4 times as expensive. After I made the shed, Harbor Freight came out with a Predator 9500 inverter that just barely has enough power. Still haven't seen a lot of inverter generators on the market that have enough power and support 240v, and definitely none that have dual fuel options.
They are expensive, for only twice the price Yamaha does make a cable for "twinning" two generators. This doubles their output, and what we got for our two. Means both generators are also small enough that you can pick them up and put them in the bed of the truck no problem, and yet still have decent output to run must-have items in the home during an emergency. Worked for about a week straight during the Houston flood when we lost power for 6 days. @@C5Tor
@@C5Tor When I decided to get a generator, the first thing on my list was NO GASOLINE. At the time that took out every inverter model on the market, it probably still does.
Great test! I ordered the exact generator as yours. I will be building a shed using the rock wool as well. Congratulations on a successful build.
Very smart ideas!... very quiet and hardly noticeable, thanks for sharing!
FrankenMuffler is brilliant - I’m definitely going to use that technique for my upcoming gen shed build.
Nice work. Good think-through process.
That's some impressive noise reduction. And all done without breaking the bank!
It’s about time the RUclips algorithm showed a generator shed enclosure with sound deadening material in my results. I’ve been researching (in RUclips lol) and this is the most complete video. Finally getting ready to build and take my garage space back. Thanks for sharing. Just wish the shed prices were cheaper. Can’t find this size shed for anything less than $469. Even from other individuals the cheapest I’ve seen is $400.
Good luck with your build. There are several more videos in this series. I cover how I built the original trashcan muffler in the Exhaust Version 1.0 video (view it here: ruclips.net/video/jZpRSenXJAs/видео.html). Then I did a later video on my Version 2.0 exhaust, which has quite a few improvements over the version 1.0 setup. The newer video has parts lists, shed costs, and other Frequently Asked Questions. Check it out here: ruclips.net/video/y3pUw408jCU/видео.html
Great job engineering this generator cabinet. Sound reduction is impressive!
I wish I saw this before my build, good job 👏🏾 👏🏾👏🏾👏🏾👏🏾
This is awesome! Glad I saw this! I live in a pretty compact area so this would be perfect! Adding to my list and I love the baffles!
Glad it was helpful!
This is a very impressive build. Good Job. Another way to keep neighbor's happy is to share some electricity with them. ...A while back a storm took out power in our neighborhood for several days, resulting in the need to run a generator several hours a day to keep freezers and refrigerators cool. I ran a mess of extension cords powering 6 refrigerators and freezers for two neighbors directly, and allowed others neighbors to store food items in fridge/freezers as well as plug in small electronics and coffee makers. This storm ended up being quite a good community building experience and all the neighbors were very grateful and very happy to have light, power and or coffee in the morning. One more tip I wish to share with like minded individuals is that when running things on a generator, it is good to know the load involved. A TV uses (80W), a laptop (50W), a cell phone charger (15W), a cable modem (30W), A typical box fan (80W), and old fashioned light bulb (100W), an LED bulb, (10W), a coffee maker (900W), a microwave (1200W), refrigerator (200-300W), a chest freezer (200W), Window air conditioner (500-1400W), and an Electric space heater (1500W). You do not need to remember all these values as they are legally printed on back of the device by the plug, but having a good solid understanding of what loads what devices are producing helps ensure you don't overload extension cords or the generator.
I’m in the process of putting together the same type generator shed. Your homemade muffler idea is next level ! Thanks for the inspiration - looking forward to your next video with more details. Thanks!
I've just uploaded another video about how I made the muffler. Link is here: ruclips.net/video/jZpRSenXJAs/видео.html
Soooo ligit
That is HANDS DOWN, absolutely the BEST, gas/propane generator sound deadening shed build/review video that I've EVER seen on YT! I'm TOTALLY going to build one just like that! I'm currently using my chicken tractor to house my generator if/when we loose power and have to run the generator and it reduces the noise level at least 50%, but no where near as much as this shed does. I love the ingenuity of using the generator itself to run the fan that cools the shed! Absolute genius brother! Great video and I look forward to watching the build videos now. You've definitely earned my SUB with this video! Thanks
Thanks for the enthusiastic feedback! Stay tuned for some more videos as I upgrade some of the components of the exhaust from 1" to 2" to make the generator breathe a bit easier. I am a bit curious what a chicken tractor is, though. (Nevermind, I looked it up. But I was totally picturing a chicken driving a John Deere.)
Thank you !! I will definitely be putting a set of "off road" wheels on my generator. The thing is a beast to move around. Many great ideas with the shed too. Generator thieves are a huge problem when there are long term power outages. Keeping things quiet makes you less of a target.
Good job. I especially liked the vent baffles which is an area most other generator sheds fail to address. Also, great job on the muffler. You can't beat volume for attenuation and you have plenty.
Great design, well thought out. Glad I found your video since I was looking for ideas
This is awesome. I love the way the generator is protected from the elements and at the same time the noise levels are low enough to not be a nuisance. Great job with this build sir.
Make sure you check out the other videos in this series. I cover the costs, parts lists, and other FAQs in a later video about my Version 2.0 Shed Exhaust. Also upgraded all the pipe from 1" to 2" to allow the generator to breathe easier.
Check it out here: ruclips.net/video/y3pUw408jCU/видео.html
If angles had been created with the rock wool, I wonder how much even more improvement would have been realized. Great build.
this looked like a GREAT project. Outstanding job.... super clean.
Impressive. I've found out I'm spending way more than I had anticipated for my generator.
Great work!!! Sound discipline will be HUGE during SHTF.
That was great with some awesome considerations to flying below the radar and not draw attention to oneself
Im about to build mine when everything arrives. I think im going to do the same thing. I think this is the quietest build ive seen on here.
Great build. Love your enclosure.
I agree with the previous comments. Excellent solution to quiet noisy portable generators.
nice work! huge difference. A lot of people don't understand that the DB measurement is logarithmic, though the numbers don't appear to be that different it is actually a massive reduction with your work!! the fact that we can hear you perfectly clear while you are right next to the genny is awesome!!! now do a shop vac lol
That’s sum professional grade work and the sound reduction outcome was unbelievable great job 👏.
Great Job. Great ideas. Thanks for the tour.
That’s an awesome set up. You should think about maybe selling the box as a kit to people who want a quiet generator enclosure. I bet it would sell great!
I would by one for sure because I'm getting my generator hookup installed next week and buying me a generator as well
Nice, well-thought-out job and application of the "sound does not like to turn corners" rule.
Thanks. To clarify: sound will certainly go around corners. (Ask any mom who can hear her kid getting into trouble in the next room!) But that is mostly because the sound gets reflected from some surface. Hard, flat surfaces will reflect it the most. In my application, I tried to make sure that the reflective surface absorbed some of the sound and reflected as little as possible, so the sound had no direct (straight) route out of the box. Thus the "sound doesn't like to turn corners" rule was just my summation of the theory. Not sure if it is written down in any physics books in quite that way.
Great job what did it end up costing?
Outstanding work on this project!!! Congrats!
Thank you exactly what I am looking for! I have an off grid situation that is being ruined by noise from generator!
Great use of a cheap blast gate! This is the best design I've seen so far on RUclips. I have been kicking around the idea of building one for about five years now. I just haven't done it. There were too many unknowns about how well my design would work. I even purchased a metal bicycle/ lawnmower storage box to use for the shell. I had planned to use 1 1/2" fiberglass duct board, but I think rockwool is even more sound-dampening or absorbing, whichever is the right term. I am really impressed with the galvanized garbage can turned into a muffing chamber.
Oh, and also the fan outlet box. Did you put a couple baffles in it to route the sound in a few different directions before it exits? Again, Great Work, Sir!
Cool dude. I just bought the exact same generator from Amazon. I plan on trying to set it up with Propane and a switching breaker box and see if I can get it to work like a "stand-by generator" to turn on and off automatically. Using the propane (for convenience ) I won't have to worry about carb clogging and fuel degeneration.
I Just finished putting together my set up. I would like to thank you for your post and some great tips. Looking forward to ERCOT dropping the ball again this winter. 👍😜
Make sure you check out the other videos in this series. I cover the costs, parts lists, and other FAQs in a later video about my Version 2.0 Shed Exhaust. Also upgraded all the pipe from 1" to 2" to allow the generator to breathe easier.
Check it out here: ruclips.net/video/y3pUw408jCU/видео.html
This is some incredible engineering actually haha, great video!
Wow ! You did a superb job on your generator sound suppression box. I don't think I've seen a better designed one anywhere. Are you an engineer ? Big thumbs up.
The BEST sound/fireproofing solution system in a plastic horizontal shed that I have seen!
I intend to build a similar setup for a smaller generator and had planned to make my own 'comfort board' type insulation out of fiberglass batts and 1/2" hardware cloth fencing. This is a huge improvement over what I wa going to try
My only concern is that by extending the exhaust as far as you did you may damage the valves on the engine from increased backpressure and heat.
I don't think it'll hurt the valves. We've added exhaust extensions to almost every engine you can think of and never had an issue. Hope this helps.
I think if you make sure to increase the diameter of the exhaust pipe, backpressure shouldn’t be an issue.
There are several more videos in this series. I cover how I built the trashcan muffler in the Exhaust Version 1.0 video (view it here: ruclips.net/video/jZpRSenXJAs/видео.html). Then I did a later video on my Version 2.0 exhaust on my channel, which has quite a few improvements over the version 1.0 setup, including upgrading the pipe to 2" diameter. The newer video has parts lists, shed costs, and other Frequently Asked Questions. Check it out here: ruclips.net/video/y3pUw408jCU/видео.html
one of the best i have seen so far. thanks for sharing, great job!
the only drawback to this beautiful design is the distant the current has to travel and it will lose some of it's current because of this variable but --- hey -- so what -- it's quiet - and this to me - he accomplished 100% ... congrats ..
I believe I will do the same thing on my gen ... TY
:)
Totally agree. The location that I had to put the generator was not ideal. Unfortunately, there wasn't a good place to put it on the other side of my garage, where my electrical box was. So I just got the thickest cables I could get and went from there.
For a much quieter generator, invest in one that turns 1,800 RPM's instead of an 3,600 RPM. Also the exhaust being curled would cause restrictions
Congrats on a very well thought out design and build! I am in the design process now and will definitely be utilizing a number of your insights! Which Suncast model did you use? I think it's the 70 cubic foot model but I can't be sure. Thanks!!
Yes, I believe it is the 70 cu. ft. model. I bought it "used" off of craigslist. The original owner had purchased it but never put it together, so it was still in the box.
It appears to be the BMS4700 "Stow-Away" Horizontal Shed.
If so, I paid $480 for mine. @C5Tor got a steal! :-)
Great build and I am definitely going to try the homemade muffler. Ingenious! I'm also very impressed with the baffles on the air inlet & outlet- I may look to add that to my build! Thanks for the video!
There are later videos as well, where I go into parts lists, costs, upgrades, and frequently asked questions. Check out the video description for links or check out my channel.
Well thought out and executed. Thanks for sharing!
Great job. This is the route that we’re going to have to take since we live in an HOA neighborhood. Have you run the generator loaded to the house? Also, have you done any testing to determine how long your propane tank will last?
We tested the generator interlock when I had it installed. Ran a moderate amount of household items. But the generator won't be big enough to run things like my air conditioner or oven. Microwave is fine. It should keep my fridge cold and the internet running. Don't really know how long a tank of propane will last yet. Still in the testing phase. Specs say the generator can last up to 17 hours on the 6.6 gallon gasoline tank, and about 11 hours on a full 20 lb. propane tank, depending on load, of course. Take that with a grain of salt, your mileage may vary, etc.
Can you share your temperature readings from inside the shed, with the generator running on load? Also, can you post a link to your exhaust fan? Thanks,
Good job that's quieter than my dishwasher!
Well done! Very effective noise wise as well as aesthetically.
Thank you. Make sure you check out the later videos, where I go into details about how I built the muffler, and how I updated the exhaust from 1" to 2" for better breathing. Also answer lots of frequently asked questions.
Great design! Since the actual shed walls are plastic, what if you drilled some small holes in each section and filled them will some type of thick fluid mixture to help beef up the walls? Could you use concrete maybe?
i thought about that too
Awesome stuff! Question- doesn't all that exhaust hose cause some sort of back pressure type issues for the generator? Like it's gotta push the exhaust all that way..
Yes, the longer the run and the narrower the pipe and the more turns, the more back pressure. I'm actually working on a version 2.0 of my exhaust pipe and muffler that opens out immediately to a 2" pipe instead of a 1" pipe, shortens the overall pipe length, and also uses some electrical metal conduit (EMT) 90 degree bend instead of the shorter 1" pipe elbow 90 degree bend. All of these should let it breath easier. Keep in mind that the muffler design was just a proof of concept to see if it would even work at all. It did work in general, but it definitely could be better. Also going to add more heat tape around the exhaust pipe itself to keep the shed temperature down.
Very good. Got a great deal on the shed. Looking forward to muffler design.
There are several more videos in this series. I cover how I built the trashcan muffler in the 1.0 video. Then I did a later video on my Version 2.0 exhaust on my channel, which has quite a few improvements over the version 1.0 setup. The newer video has parts lists, shed costs, and other Frequently Asked Questions. Check it out here: ruclips.net/video/y3pUw408jCU/видео.html
Pretty cool setup. The only recommendation I would have is to remove the propane tank from enclosure . As the tank heats up it builds pressure. If the pressure reaches its limit the tank has a blow off valve. If it blows off inside that enclosure you will turn that enclosure into a large expl*sion.
Nice job and really well thought out. Thanks for sharing.
Thanks for the inspiration.
Just finished building a box for mine used three blowers to remove the huge amount of heat.
Wow! great job! I'm in the process of doing the same thing. I like the idea of using a small plastic shed.
Make sure you check out the other videos in this series. I cover the costs, parts lists, and other FAQs in a later video about my Version 2.0 Shed Exhaust. Also upgraded all the pipe from 1" to 2" to allow the generator to breathe easier.
Check it out here: ruclips.net/video/y3pUw408jCU/видео.html
Great info. I'm in the process of putting in a generator for my whole house. I am planning on building a storage/sound reduction for mine. I have to have it next to my house, so I want it to be as quiet as possible when it's running.
Love what you have done here!
That’s very nice setup there sir !
That is an awesome shed build
Interesting. It’s the best shed mod I have seen. 👍🤙🏼💪
Wow that’s really impressive!!
Nice job! I like how you did the setup you have. Gives me some great ideas.
Check out my channel for more vids on this subject. The later videos have parts lists, FAQs and other stuff that I upgraded from this original design to make it more efficient and safer.
Great job man. Very impressive
Very clever set up.
Excellent project!!!
Just bought the same generator and will do the same or similar!!! Great job
Outstanding work. Clean nice
Thank you for a few ideas, very good information 👍🙏🏼🙏🏼🙏🏼
Outstanding! Thank you for a great instructional video!☺
Unbelievably helpful, thank you for sharing this
Nice build! I am planning something similar. Really like the muffler idea, and the baffles....
Very nice build! One of the best I've seen and I've watched a lot of videos. I live in central Florida, so I think I would really need a wood version fortified for a Hurricane. Ideally I'd like to have it operable during a hurricane so if the power goes out I can remote start the generator and I'm good to go.
Really nice design and build
thank you for the tips!!! great video!
You are the best kind of nerd. Thank you for making this video.
That may be the best compliment I've received yet! Love it!
Great job sir. Thank you for sharing.
Absolutely amazing! The best ever. I don’t know if you’ll read this since it’s been awhile. But man just amazing.
Yep, I read them all, as there are lots of questions and I appreciate the feedback. There are several more videos in this series. I cover how I built the original trashcan muffler in the Exhaust Version 1.0 video (view it here: ruclips.net/video/jZpRSenXJAs/видео.html). Then I did a later video on my Version 2.0 exhaust, which has quite a few improvements over the version 1.0 setup. The newer video has parts lists, shed costs, and other Frequently Asked Questions. Check it out here: ruclips.net/video/y3pUw408jCU/видео.html
Awesome idea. Appreciate this info!
Good idea using the trash can. For permanent stationary engines I have seen people use 55 gallon drums sunk level with the ground full of rock with the exhaust pipe 3/4 of the way down and they are almost dead silent.
That's dope!
Blessings From Texas🤠
Yes, I agree, an awesome idea!!! thank you for sharing!
That's a cool cart you made
Great idea! Plus, if you’re storing it there a thief probably isn’t gonna think anything of real value is there. 👍🏼
Nice Shed!
Nice Idea !!!
Impressive! Thanks for sharing!
Good job my friend .
Brilliant work I’m sure your neighbors are very pleased and so should you 9:03
Amazing work, kudos man 👏
Excellent job man!
I built same 5 years ago. But used two electric fans. Bigger exhaust pipe same shed but From Lowe's. Took truck plastic gas tank mount on back
25 gallon. With gas gauge use almost same cord from Walmart I also put extension on oil. Fill and drain from outside of generator house I used fire proof rock board inside for inside the walls . And key start on outside of generator house installed lights inside for nite time use light switch fuel gauge start and choke mounted on outside generator house. Hook up my own manual transfer switch next main power box easy on and off whole house power. This has been working just over 5 years with many power outages this guy did great job 🤔 but exhaust pipe to small can lead to engine over heating and burnt valve I also used vent covers from ac filter there big and provide lots of air. Key start and light switches , fuel gauge mounted inside water proof case normally was used to cover two outside wall sockets got the biggest one clear door on front when door is open lights come onthere can see fuel gauge and others that mounted in there.used switch for lights from car door interior lights
Sounds like a great setup with lots of convenient customizations for running long term. I wasn't quite that ambitious, as backup power is kind of the secondary function of this generator. I do agree on the exhaust pipe issue on my build. I'm working on version 2.0 of the exhaust setup today. I'm going directly to a 2" pipe to the muffler, and the new muffler has a lot more flow to it (a funky 4" x 8" spiral chamber in the muffler.) Doing some testing this weekend to see how it works. Crossing fingers! Thanks for all the tips!
@@C5Tor thank you. .my exhaust I ran straight out motor to outside with muffler at the end but used stock motorcycle muffler . Love trash can idea . Did you use fiberglass insulation in can I think empty can would make it louder. I also header wrap from advance auto to wrap pipe . Generator bought from harbor freight they must had a return because generator head was changed should have been 10 000watts but came home with 25 000. Watt. For $800. But loves gas my power out after hurricane 2 weeks ran generator whole time 24 7. But off for oil changes. 170 gallons of gas but also had ac on water heater lights had whole house power. .but I love what you did bring back lot of memories. .god bless 😊
Sounds like you got a great deal on that generator! I have another video on how I built the trashcan muffler. I'm actually working on a second video on my Gen II muffler with bigger pipe and better flow. Gen I was super effective at cutting down the sound, but probably had too much backpressure. Might have the new video out next week after some testing. Gen II muffler takes a different approach than the Gen I. Check out the Gen I video here: ruclips.net/video/jZpRSenXJAs/видео.html
Great video, thank you for you efforts.
Damn that seems like a whole Lotta work! But looks like it works very well. Nice!
It wasn't trivial, but also not too hard. Just depends on how quiet you want it. You can use some of the tips or all of them. I just posted this to give others some ideas. It took me an afternoon to put the shed together (the door hinges took some fiddling on this model). About two hours to cut the holes and install the fan and air inlets (tip: I used an oscillating saw to cut the holes - it goes through the plastic like butter!) and put fire resistant foam in the gaps. Another two hours to put in the insulation. The baffles took about an hour to build, and the muffler another hour or two. It actually took me a lot longer tracking down the material and parts than it did to actually put it together. I did a lot of pre-planning and research to think about what parts I would need.
Great job!
Awesome build, thanks for the ideas to improve mine.
Make sure you check out the later videos on my channel where I go over improvements to the design, parts lists, prices, FAQs, etc.
Great video! Very helpful.