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Tool Talk Discussion Forum

Outdoor Wood Furnace

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John UB

07-23-2003 18:08:38




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With the increase in the price of natural gas, I'm thinking of buying an outdoor wood furnace. Has anybody bought one before? What should I expect to pay? Is it worth it? Any comments would be greatly appreciated.

Thanks!




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jeff

08-15-2003 11:00:05




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
i have an indoor clayton that is forced air with propane backup. i have a hot water coil in the firebox. it works great. last time i bought propane i paid $1.47/gallon, i use about 400 gallon/year(hot water is propane).
outdoor is much safer. my brother in law has an outside boiler. and he burns literally twice as much wood as i do. our houses are the same size and both new.
another brother in law burns coal in an outside boiler after he starts it with wood. i read somehwhere that coal puts out almost twice the btu as most wood but plenty of smoke. he is looking to dump the wood furnace for a corn burner as he burns about 24 full cord per year.
i ran into another guy that burns cut up tires in a boiler with wood. real hot and smokey.
that reminds me, i should cut wood tonight.

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Tlp500

08-10-2003 19:05:05




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
Hi John, I have a Heatmor furnace. I have read the replys. Loading the furnace is not a big deal, I do it when I get home from work, your out side anyway. The only time my furnace smokes much is when the fire is shuting down and that only last for three or four minutes. Ninty cent propane is gone just like ninty cent gasoline. I would say buy one, but look at different models so you know when you buy, your getting what you need. I really like my Heatmor. $5000.00 plus materials to finish hooking up to your existing system.

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andyd

07-30-2003 21:26:44




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
Had burnt wood for over 30 yrs the long lasting water heating thing will work? but have you thought about that wood isnt free either! figure your chain saw! gas for it pickup or wood haller! you time whats it worth?dual fuel heat pump or water source heat pump? corn stove or heating equipment? but the best windows and doors also insulating material also help cool in summer to?heatpump works efficently down to about 35 deg then you need to switch to gas oil or corn! that corn system looks good and they deliver it in bulk! my system uses lp-gas below 35 very reasonable only used 100 gal last year been using500 + before insulating + windows and doors?

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KURT (mi)

07-27-2003 04:30:24




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
I dont know what they cost, but I bought a medium sized Lopi wood stove for inside my house 2 years ago and it was $2000 (stove and 14' of pipe). A friend of mine has an uncle who has an outside wood stove boiler, uses it to heat the house and make hot water for showers too I guess, probably needs a temp reducer in there somewhere. One thing to remember is that you are going to have to go out and load wood into it in the real cold weather. Is it possible to just get an inside wood burner instead.

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John UB

07-28-2003 07:24:36




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 Re: Re: Outdoor Wood Furnace in reply to KURT (mi), 07-27-2003 04:30:24  
Kurt,

I don't mind loading the wood outside. I really don't want an indoor wood stove, because I don't have a lined chimney. It sounds like the only real concern I may have is the amount of smoke they produce.

John



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Robert in W. Mi

07-29-2003 12:28:10




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 Re: Re: Re: Outdoor Wood Furnace in reply to John UB, 07-28-2003 07:24:36  
I see there's a movement in some area's to get them banned because of the smoke. To make the fire last a long time, they have to sit there and smolder instead of getting a good burn. Every one i see is putting out a lot of smoke. Robert



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tdzimmerer

09-16-2003 18:03:54




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 Re: Re: Re: Re: Outdoor Wood Furnace in reply to Robert in W. Mi, 07-29-2003 12:28:10  
I have a woodmaster outdoor furnace. It is the best thing sense sliced bread. Anybody that likes to carry wood indoors is crazy. I do not have to split wood becuase of the two ft by two ft door. If you do decide to order a stove look to see what one has the best backing by the company.



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Dan

07-25-2003 16:00:53




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
out of all the people i know that have one only one likes it becouse he burns everything in it used oil dry wood wet wood green wood garbage. all the niegbors hate them cuz the smoke always hangs very low i wonder if they put a taller smoke pipe if that would cure the problem?
when me and my wife build our new house we will deffinatly avoid an outdoor furnace becouse of all the things iv seen go wrong with them plus the smoke problem

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VaTom

07-25-2003 18:09:24




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 Re: Re: Outdoor Wood Furnace in reply to Dan, 07-25-2003 16:00:53  
Hi Dan,

Sure, a taller stack will help the immediate neighborhood- while making the air worse for people a little farther down wind. The only "fix" is quite expensive, other than burning cleaner fuel.

Remember, this is a stove we're talking about. The best way to have clean(er) emissions is to run it hot. Doesn't happen most of the time.



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Mike

07-25-2003 03:17:32




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
I put in a reconditioned Taylor 450 4 years ago. My costs for the stove, piping and baseboard heaters was about 4500$. It heats the domestic hot water yr round. rule of thumb for distance of stove is 10$ a foot. I didn't believe it but my stove is 90 feet from my house and the cost to get the water in the house was just shy of 1000$ some people have poor luck with them but I believe their maintinence is lacking. I have no regrets w/ my system

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Paul

07-24-2003 11:12:21




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
I had a Taylor outdoor wood furnace for about 8 years, connected by underground pipes to forced air heat exchangers under the house. It had a 750 gallon water jacket and took 36" logs. It heated our 2800 s/f house very nicely, and required only that the creosote be cleaned out once a month, and an additive put in the water once a year. I did have to replace water from time to time, due to evaporation, but a sight glass let me know what it needed. Age (mine), plus a decreasing amount of easily available wood around the house led me to start having a logger deliver a tri-axel load once a year, and eventually (again, because of my habit of cutting the wood but not splitting it if I could lift it) led me to hire someone to do the cutting and splitting. Eventually that got old, too, and I replaced the stove with an oil stove (high efficiency), hooked up to the same water lines, and fitted it and a 500 gallon tank into an isulated 6x10 building. Works well, but I miss the woodburner. Sold it for half what I paid (about $3200 delivered). And then the latest fuel crisis and I'm wishing I had kept it and set it up as the main source, with the oil burner as back-up.

It is good technology, Taylor or Hicks are the makers of choice around here (Virginia mountains), and they do need to be sized to your heating area. Expect to to routine maintenance, and remember that they still need electricity to operate (as well as a water source and the wood). I would not recommend a dual fuel type, based on experience of others I know who have tried them. The burner for a gas or oil will get fouled unless it is completely separate from the wood buring firebox.

Hope this helps. By the way, it has gotten as low as -36 degrees here in winter, and the stove still only needed wood twice a day. Usually once a day below 20 degrees, once every other day up to about 36, and so on.

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jp ny

07-24-2003 11:04:14




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
John, I put one in last year [AQUA-THERM] only presurised unit I know of. Watch the cost of piping because that's where you will spend the big money. I paid 4300.00 for my stove and 5500.00 to hook it up to two homes and two garages. Insuled pipe is pricy and the 1 1/4" pex is privy also. MY stove is 200' from each home and work beautiful, my oil furance is set at 10 degrees below wood furance and never comes on, we also heat all of our hot water for both homes. I built my own shed to house the stove on 8x12 slab and have 16' roof off the side so I'm under cover to cut or file stove.

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INCase

07-24-2003 10:13:00




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
If you are looking at auxillary heat without bringing wood into house you may want to look at Pellet and/0r corn stoves, furnaces or boilers. The stoves are free standing and the furnace or boilers can be added onto most exsisting systems. Since you live in SW MI you can go to Weldy's over in Buchanon for pellet stoves ($2000)or a place called Topeka feed and seed in Topeka IN (south of Sturgis/Howe/Shipshewana for furnances/boilers that will burn corn (cheapest) or wood pellets. they run around $3000 they also have stoves that will burn straight corn too.
we added on to the house and added a Whitfield pellet stove and pretty much like it. It will hold 1-2 days of pellets (depending on temp) and Pellets/corn are easy to handle in bags with no sawdust/bugs/bark/snow/water ect we got the pellets at lumber yards, TSC, Menards Weldy's ect.
look up the Pellet fuel institute online too. Good luck

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VaTom

07-24-2003 04:43:57




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
Hi John,

Expect large creosote production as they smolder most of the time. That $5k that kjm mentioned is reasonable.

I'm going to use one as a solar back-up in my next house. I've found used ones for a small fraction of new. The first one I found turned out to be too big as they are (properly) sized to your heating needs. Thought I had it sold but it's still sitting here, un-paid for, if you're near central Virginia. This sucker will take 4' logs. Formerly heated 6 apartments and had a fuel oil backup system. I wouldn't want it behind me in a 1/2 ton pickup going down the road.

I figured, GREAT- it'll come on once a week. Turns out that's not good. I had a boiler guy come out and advise me what size would work better and ended up with one about a quarter that size, also used.

The big question is what you'll use for wood. Not a problem here as it's all around me.

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John UB

07-24-2003 09:20:27




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 Re: Re: Outdoor Wood Furnace in reply to VaTom, 07-24-2003 04:43:57  
Hello Tom,

I live in southwest Michigan and wood is not hard to come by around here.

It looks like I will have to do the math and see how long it will take to earn back the $5K. Thanks for all your help.

John



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kjm

07-23-2003 18:40:56




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 Re: Outdoor Wood Furnace in reply to John UB, 07-23-2003 18:08:38  
John, I priced one last week $5000.00 it would heat my shop too(as soon as I build one). Last year I used 500gal of propane at .79 a gal. This year it is .99 a gal. I can`t see spending that kind of money for wood, just do the math and do whats best for you. (Two years ago I used about 1800 gal but one new house later, I`ll stay with gas.)LOL kjm



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patrick jones

09-23-2003 08:54:13




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 Re: Re: Outdoor Wood Furnace in reply to kjm, 07-23-2003 18:40:56  
We supply a line of brazed plate heat exchangers for domestic water heating, snowmelt using wood fired boilers.
We also supply stainless steel heat exchangers specifically for swimming pool heat exhangers
Our units are very widely used in this industry.



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07-24-2003 17:02:04




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 Re: Re: Outdoor Wood Furnace in reply to kjm, 07-23-2003 18:40:56  
John,
Propane for 90 cents a gallon, thats a deal where I come from. I Heat with a couple of wood stoves. One on the main floor the other in the walkout basement. Most of time only need the one unless it gets real cold. Running out doors to load the firbox seems like it could be a bother with the outdoor type.



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RayP(MI)

07-24-2003 20:02:04




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 Re: Re: Re: Outdoor Wood Furnace in reply to [email protected], 07-24-2003 17:02:04  
To welchp, above, you don't have to reload them that often, maybe once a day in real cold times, in less severe temepratures, once every other day or two! The $5K is about what they run here - I've been looking into them too. Brother-in-law has a Heatmor, and is very happy. Water system is sealed, and adding not necessary. Central Boiler is also makes a good looking unit. I'm leaning toward the Heatmor. Has several features I like, including ease of removal of embers. DO YOUR HOMEWORK before you buy! My propane bills for the last three years are about $1300 a year. Wouldn't take too long to come out even at that rate.

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dmk

07-25-2003 17:59:16




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 Re: Re: Re: Re: Outdoor Wood Furnace in reply to RayP(MI), 07-24-2003 20:02:04  

we have a Heatmore, we love it, put wood in once a day and you are done. we heat our house, 32x40 shop,domestic water and two richies, we cut our own wood, had it 9 years now paid 2800 for it



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