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Discussion Starter · #1 ·
Alright Im new here, Got this idea in my head of how to heat my garage just want to run it by some people that know what they are doing to point out any flaws in my design so I dont blow something up or catch something on fire.

got a 25x30 non insulated garage. does have a second floor which is insulated will help a little due to heat rises but yeah. I am not looking for 70 degree garage here just 40 maybe 50 enough to take the chill off work with no gloves n the winter type deal.

Looking for very lost cost here.

plan is to strip down a electric water heater and modify the inside metal tank into a wood burner, put a door, some air vents and chimney on it. done it before thats how i heat my shed. Then want to run some copper tubing around the inside top of it. not for sure what size yet. Run it out a few inches 90 it towards the ground and then run pex with the pieces of black pipe insulation on it down into the ground around foot foot and a half deep and to the garage. 2 lines in and out. Plan on putting 3 maybe 4 inch pvc in the ground and sticken up around a foot to run the pex and insulation threw to keep it dry. (going to do a metal box around the wood burner out of sheet metal for a pole barn make it look better and keep the wind from hittin the pipes and wood burner directly) The wood burner be around 15 to 20 feet from the garage.

then inside have a line that runs up the wall 10' walls and about 10 feet from the wall where I want to do a fan and a radiator out of a car run it threw that then back and down the wall to a couple gallon tank which will then go into a water pump with 1" in and out 60 gallons per minute (opinions on that will be welcomed) and then connect to the line that goes to the wood burner. My theorys on the tank is to make sure the pump always see's liquid and figure it will pump it threw and keep any air out of the lines since its just 1 line. and half about 1/2 to 3/4 of the tank air to help allow some expansion due to expansion from heat. Do plan on doing a pressure release valve near the wood burner outside. I am thinking box fan for the radiator. IF this idea works decent might do a duct work idea going accross the ceiling with the fan blown threw the radiator into it have it go side to side of the garage then down and blow out near the floor. Also want to use maybe antifreeze in this instead of water since it wont be going all the time and will freeze up if its just water. Had a friend mention to me just mix water and vodka since antifreeze is toxic (still need to do research on antifreeze and see whats all available) do have a pet dog and dont need a leak or a pressure release blow out and end up with a dead dog. Also figure if the water is 2 hot and not heating the garage enough can always get a second radiator T it and run 2 radiators and 2 fans.

I DO NOT have the money to put pex n the floor and pour a layer of cement over it. Wish we would of thought about it and run pex n the floor before pouring the cement.

ANY thoughts, comments, flaws, you wanna post feel free dont worry about hurting my feelings about this. I got a 80 gallon hot water heater already and lined up a radiator for a camero for cheap. got a extra box fan to use.
 

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While that amount of thought is admirable, it appears to be a whole lot of work and "back yard" engineering with potential pitfalls.

Having spent time in a similar sized garage, detached mind you, I know how cold it can get. With the/a unheated slab, it's a losing battle once the surface temps fall....

The heating source for the one I was in was nothing more than one of those torpedo style kerosene heaters. After the owner cleaned all the gunk out of it ( tank and filter ), that thing got it warm enough in there for short sleeves, albeit after running for about an hour. Cost is initial price of the heater, then the kero....

Another option for you, if the garage has decent electric, is for a wall hanging heater, like a Dayton. Then you have initial cost of the heater, but no consumable ( kero ) expense, only an increase in the electric bill. Both have positives and negatives, and you need to be aware of doing anything with volatile chemicals.
 

· Roofmaster
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You really have to watch out for Gasoline fumes if you are working with open flame. This is dangerous. I think you should insulate the walls and your Overhead Doors before doing anything else. A Convection type Kerosene heater gives off a lot of heat.

Nice idea with the water heater though, I admire the approach.

I am using one for a batch solar tank in the spring to temper my incoming well water prior to HWH.
 

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Discussion Starter · #5 ·
Insulating it is possibly in the future. but not this winter. $$$ shortage reasons. the garage has new wiring but will rather stay away from electric and fuel heaters due to haven to pay for them. electric is not cheap. I figured if i do my idea between the pump and fan im only using maybe 500 watts of electric compaired to 1 or 2 1500 watt electric heaters. have no 220 outlets for the heavy duty garage electric heaters.

torpedo are nice but loud and the open flame I dont like. really if im in there building something and got saw dust floating around. Plus fuel costs. Figure even if i spend $500 in materials it SHOULD be a one time thing and be done with it. the amount of work it takes to make and install this does not bother me. IF it saves me money im not afraid to do work I try to do everything myself. Cheaper, I know exactly how it was done, and learning experiences then i can charge others to do it for them after i trial and error on my own. BUT with this, theres not much trial and error I want it to be a 1 time deal.

I live in Nothern Ohio BTW detached garage. Wood is easy to come by for me. got a local place that makes pallets and got access to there scrap wood. got drift wood that washes up from the lake and a few other sources just to get scrap junk wood and logs and such

yeah vodka, IDK he said mix it with the water. I figure this set up should only take a couple to a few gallons then w.e size tank I get.
 

· JOATMON
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The alcohol in the vodka lowers the freezing point of water....but, it will also evaporate off....while glycol will not.

While the whole thing scares me.....I would like to see pics when it's done.....but I'm inclinded to think that money spent on gloves and warm clothes might be a better value....
 

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Discussion Starter · #7 ·
Alright ill have to look into glycol....it scares me some to thats why I am here so im not just going by whats n my mind the mind that has never done this before LOL.

well gloves are a pain to work in most of the time. I got lots of gloves and warm clothes but to try working in them and if building something it dont matter how well im dressed glue wont dry at 30 degrees LOL or paint wont dry either.
 

· Master General ReEngineer
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Insulating it is possibly in the future. but not this winter. $$$ shortage reasons. the garage has new wiring but will rather stay away from electric and fuel heaters due to haven to pay for them. electric is not cheap. I figured if i do my idea between the pump and fan im only using maybe 500 watts of electric compaired to 1 or 2 1500 watt electric heaters. have no 220 outlets for the heavy duty garage electric heaters.

torpedo are nice but loud and the open flame I dont like. really if im in there building something and got saw dust floating around. Plus fuel costs. Figure even if i spend $500 in materials it SHOULD be a one time thing and be done with it. the amount of work it takes to make and install this does not bother me. IF it saves me money im not afraid to do work I try to do everything myself. Cheaper, I know exactly how it was done, and learning experiences then i can charge others to do it for them after i trial and error on my own. BUT with this, theres not much trial and error I want it to be a 1 time deal.

I live in Nothern Ohio BTW detached garage. Wood is easy to come by for me. got a local place that makes pallets and got access to there scrap wood. got drift wood that washes up from the lake and a few other sources just to get scrap junk wood and logs and such

yeah vodka, IDK he said mix it with the water. I figure this set up should only take a couple to a few gallons then w.e size tank I get.
Ayuh,... then put a real woodstove, Inside the garage....

A properly assembled, 'n properly installed barrel stove kit will do what you need,...

Safely....
 

· Master General ReEngineer
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I know im asking for help. but im looking for flaws
Ayuh,.... Yer firebox will be too tiny to build any heat....

Yer copper wraps will be too small to gather heat....

Yer hot water, will be Cold, as it leaves yer 1st radiator...

Yer "Plan" has No chance of Workin'.... it'll be Wasted money to build it.....

'n I find it Funny, that you seems to think a salamander is gonna light off some sawdust in the air....
 

· In Loving Memory
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You would also need an expansion tank. Vodka is flammable and the worse thing to use an antifreeze in something like this. As said earlier, polypropylene glycol is what you would need to use. 60 GPM through 1/2" pipe and a auto rad would require a pretty strong pump, so you would be using more then just 500 watts. You also need to add some sort of aquastat device to limit the amount of heat in the stove.
 

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Wood fired boilers (and that is what you are making) have a tendency to rupture if there isn't sufficient control over the heat. And it will probably take you longer to heat the area than use the area. It would be much more efficient, and perhaps economical to get an LP heater of some sort. The hanging heaters work quite well and LP is just about 1/3 the cost of kerosene....at least around here. I do have an LP heater which is Dayton and it is very compact and half as loud as the normal torpedo heaters. But at $4.50 a gallon I am using it sparingly.
 

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Discussion Starter · #18 ·
why would it rupture? really I dont see the water getting super hot with how much it be flowing. Ill have a tempature gauge on it to detect the liquids temperature as it enters and exits the garage. I want to stay away from any type of electric or gas style heater due to the running cost. Wood i can get for free pretty much. Just dont have room in the garage for a wood burner. Thinking of doing a wood burner with a sealed chamber around it and just run air around it heat the air and have it go into the garage. but that involves running like 2 8 inch lines or so and alot more work. this liquid idea seemed better
 
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