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User Projects & Pictures / Re: Bentone burner
« Last post by Fenderson on September 17, 2017, 06:15:22 am »
That's one interesting burner!
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Hey guys...    new to the forum but not to waste oil.

Ive been processing waste motor oil into fuel for our trucks for years...    and with our stockpile continuing to grow (nearly 2k gallons on hand), figured I might as well get some other use out of it too.

So I scored a complete Reznor RA235 with external pump for $200.  Went and picked it up...  guy said it worked when he pulled it down but he removed it because he was upgrading (unit is 15+ years old) and the heat exchanger had some burn holes in it.

Got it home and pulled it apart.  The burn chamber itself is in good shape...  but the oval tubes under the chamber are rough.  All 3 tubes have holes on the fan side of the unit.

Now...  I'm planning for this season, to just patch it up and get it running to make sure everything works...     however the unit is WAY too big for my shop.  After doing some math...  it would be plenty to heat both my shop..  and supplement my home.

To do that...  I'm thinking boiler.  I'll have to rebuild the heat exchanger completely next year for sure...   so why not pull the working parts off the unit and either tracking down a used boiler unit or building one from scratch and converting it to be waste oil fired.  A simple system with a single large heat exchanger in the main air handler in the house...   and another heat exchanger in the shop.

Basically, build an outdoor waste oil fired boiler similar to the add-on wood fired boilers.

Does this sound plausible?

I'm curious what direction I should go to heat the water tank if I do this...     either build a burn chamber with a water jacket (roughly 200-250g tank) or a stainless coil inside the burn chamber heating a remote (heavily insulated) 250 gallon tank.  Which would be more efficient?

The burner will be controlled via a water temp thermostat.

In my mind..  it seems like a simple system/idea.  The shop and house are roughly 50' from each other..   I figure build a small outbuilding in between to house the boiler and water tank, pumps, etc..

Am I crazy?

Thoughts?

Thanks guys
-Chris
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Commercial Waste Oil Heaters / Re: heat exchanger rust
« Last post by ShopSpecialties on September 06, 2017, 06:46:26 pm »
That is a great idea, you should be able to sell that one for enough money to fund the cost of a new propane unit.
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Commercial Waste Oil Heaters / Re: heat exchanger rust
« Last post by 240six on September 06, 2017, 06:28:48 pm »
Thanks for being honest about this not being the best choice for my garage size. Although I liked using the waste oil[free fuel] it is way oversize for my needs. I will look into another fuel source. Maybe I can sell this one. Thanks again
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Commercial Waste Oil Heaters / Re: heat exchanger rust
« Last post by ShopSpecialties on September 06, 2017, 04:15:54 pm »
140,000 BTU is the smallest. I would get some bids for propane and see what you would be looking at for costs.
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Commercial Waste Oil Heaters / Re: heat exchanger rust
« Last post by 240six on September 06, 2017, 01:41:57 pm »
Is there waste oil heaters that small a BTU or do I need to look at propane. I have propane.  Electric would be expensive.
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Commercial Waste Oil Heaters / Re: heat exchanger rust
« Last post by ShopSpecialties on September 06, 2017, 01:10:39 pm »
I would not go smaller than 45,000 BTU or larger than 60,000 BTU. Both of those can be purchased for well under $1,000. A new CB-140 is going to run you $4,950 maybe cheaper if your dist is running any kind specials. That is a big price gap for a shop that only gets occasional use.
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Commercial Waste Oil Heaters / Re: heat exchanger rust
« Last post by 240six on September 06, 2017, 12:39:26 pm »
It is just under 11 to the ceiling. I would have to measure to be accurate but about 10' 10". Is 2x4 walls with fiberglass insulation as is the ceiling. I have a barn style roof but the upstairs is not insulated. If you need more detailed info let me know. At work now. It is a 3 bay garage with insulated garage doors. Hate to switch but there might not be a unit small enough. Thanks for you time and effort on this.
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Commercial Waste Oil Heaters / Re: heat exchanger rust
« Last post by ShopSpecialties on September 06, 2017, 12:16:17 pm »
If you were my customer I would try to talk you out of buying a heater. I believe in being honest with customers is more important that making a couple of $$. For that small of shop I would go with NG/Propane or even electric depending on rates in your area. 

What is the height of your shop and level of insulation ? Lets try to narrow down your BTU # and see what would work best for you.
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Commercial Waste Oil Heaters / Re: heat exchanger rust
« Last post by 240six on September 06, 2017, 12:01:39 pm »
That is the correct size. Guess the guy I bought it from wanted to sell one. No wonder it heated so good! Would this be to small an area to really use one? I would like to use one again but maybe need some guidance on the proper setup to use. Any suggestions are welcome. Thanks again
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