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doily_grunge
4th Aug 2018, 09:11 AM
G’day everyone I’m in the middle of a heater build for my shed I’m wondering if anyone has any experience with flue size? I’m thinking of using about a 6 1/2”. Any help would be awesome thanks. I’ve attached some photos for a reference too.https://uploads.tapatalk-cdn.com/20180803/5d32c0f69fee25b015c3be9b9318ebb3.jpghttps://uploads.tapatalk-cdn.com/20180803/69daff498e766f2c7f58ff61534c19b5.jpghttps://uploads.tapatalk-cdn.com/20180803/277c9e3982353bd6a16c068764b2d483.jpg

simonl
4th Aug 2018, 03:14 PM
Nice work.

You may need to experiment with flue size. I built a similar "camp coonara" for camping out of couple lpg cylinders. I started off with 3" exhaust but ended up going to 2-1/2" as i was loosing alot of heat out through the flue.

While yours will be bigger and your flue maybe longer, you may find 6" a bit too big. If you dont have any spare material to experiment with then probably 6" would be the best guess. You can always add a damper on the flue if you have to.

You dont want to stuff around too much as the flue was the single most expensive part of my heater.

Simon

Sent from my SM-G900I using Tapatalk

doily_grunge
4th Aug 2018, 04:02 PM
Nice work.

While yours will be bigger and your flue maybe longer, you may find 6" a bit too big. If you dont have any spare material to experiment with then probably 6" would be the best guess. You can always add a damper on the flue if you have to.


Thanks, I’m thinking I will add a damper just in case.


https://doilygrunge.weebly.com

BaronJ
6th Aug 2018, 02:59 AM
Hi Guys,

I wondered where those old brake drums went :2tsup:

Nice idea !

OxxAndBert
7th Aug 2018, 04:33 PM
Pretty sure my shed heater has a 5" flue.
The heater itself is made from an old 45kg LPG bottle.
I didn't put a damper in the chimney but in hindsight it would have been a good idea.
I did put an inlet damper on it though. Here's a dodgy photo with the door open from when I was stress relieving some bars from a cast iron grate for scraping practice.

https://uploads.tapatalk-cdn.com/20180807/fde0e2eeca711f69bf4981fa738b43d7.jpg

Steve

doily_grunge
25th Aug 2018, 07:23 PM
Finished the heater here is the finished product. Ended up going 6” flue with damper.

https://uploads.tapatalk-cdn.com/20180825/48505d424a0c220b4b0fc4fa07d49e94.jpg

DSEL74
25th Aug 2018, 08:29 PM
Looks very professional. With all the black I can’t see if it has a door or just a opening.

simonl
25th Aug 2018, 08:35 PM
Nice work. I think the door is at the top where the handle comes out. I think you rotate that handle to hinge open the top half plate.

Simon

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doily_grunge
25th Aug 2018, 08:37 PM
Yeh the door is on a swing hinge at the top

doily_grunge
25th Aug 2018, 09:04 PM
Couple more pics of the heater

https://uploads.tapatalk-cdn.com/20180825/541aacfb23f0733fdade0e8bd5972e12.jpghttps://uploads.tapatalk-cdn.com/20180825/4079e0c77d4416833d4c352500fcf9d9.jpg

DSEL74
25th Aug 2018, 09:06 PM
Ok the steel band around the middle was what was throwing me off in the first photo. [emoji106]

doily_grunge
5th Sep 2018, 10:32 PM
G’day I’ve made an instructable on how to make the above brake drum heater. Thought it might be helpful to anyone wanting to make one. Any tips or ideas would be much appreciated.
https://www.instructables.com/id/Brake-Drum-Potbelly-Heater/