whats the cost of installation?

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gramesj

New Member
Dec 30, 2016
16
michigan
I'm looking at having a outdoor wood boiler installed and I have no idea what an average cost would be. I found a used wood furnace for $2000. But it doesn't come with anything. No circulating pump or heat exchanger or lines. So my question is what would be an average price for installation or plumping in an outdoor wood furnace? I actually got a quote from a local guy and he quoted me $4,600. I should add that this is all in the upper peninsula of michigan. His quote didn't include burying the lines. Basically it looks like I do all the grunt work and he comes in and does the easy part for a hefty chunk of change. But that is what I see, this is my first outdoor furnace. From what I can figure out the insulated PEX is pretty expensive. I am thinking of locating the furnace about 75-100 feet from the tie-in point on the indoor preexisting gas furnace. Or at least I am thinking 75 foot of insulated PEX including burying it three feet. Also the quote is for adding an side arm heat exchanger for the domestic hot water tank.

So does this sound to high or am I just over reacting?

Thanks for any help you guys can give me.
Jamie
 
If he's quoting thermopex or equivalent AFAIK that's ~10 bucks a foot so that's ~$1000. Heat exchangers, pumps and the various fittings is another easy $1000. Two guys for X hours at ?? Labor.

I'd expect a licensed plumber would be charging 75-100 per man hour. Add some profit and misc stuff and the fact a lot of guys don't want to mess around with used OWB and 4600 sounds in the ball park.
 
MAKE SURE that the good underground piping is being used. Thermopex or Logstor type (uses closed cell solid foam insulation).

Anything of the wrapped insulation variety is to be avoided.
 
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He is. I saw a cross section picture of it. And after I got the quote I went online and looked up parts and cost as much as I could find. I found out that the under ground PEX was the most expensive part besides the boiler. I'm not actually in Michigan, I'm paying this guy to do it at my moms house and I live down in louisiana. Other wise I'd do it myself. I'm renting the house out and I've found the gas bill is a little high for most renters. It's about $4,000 a year in heating, that's heating a 40 something year old house on a lake.
 

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Yes, it does. The Watts site does say its closed cell. Do you know $/foot?

Insulation is a different color though. Long as it isn't a cheaper knock off...
 
Here's a break down of what I paid.
New boiler-$5600
Heat EX- 500
Rented trencher-200
Concrete for pad-250
Underground pipe-650
Tstat wire-60
Labor to hvac man to tie everything to the unit and put the heat exchanger in, metal work ect. $600

Probably right around 8k after you figure in pex fittings and other odds and ends. I did all my on labor except for the hvac part.
 
Thanks, that's a pretty good break down. Did you do all the work and the Hvac guy just showed up and did the final tie-in? If I subtract the cost of your boiler that's way under the $4,600 quote I got. How much underground pipe did you buy?

Mine will be going into a crawl space under the house, I can't get a trencher under there. Do you think I'll have to dig a trench under my crawl space three feet deep? Or maybe a shallow trench then bring it up to the floor penetrator? Or with all that insulation on the lines can I just leave it exposed in the crawl space?
 
I know right now I've got snow on the ground up there in michigan but this guy isn't even trenching the line. And his quote doesn't include a cement pad for the boiler. His quote was just to lay the line on top of the ground until I could trench it in the spring. I just feel his quote is high for what he's actually going to do, I can't shake that feeling
 
I'm paying this guy to do it at my moms house and I live down in louisiana. Other wise I'd do it myself. I'm renting the house out and I've found the gas bill is a little high for most renters. It's about $4,000 a year in heating, that's heating a 40 something year old house on a lake.

I'd ballpark that $4000 of natural gas is going to be at least a couple dozen full cords of firewood per winter in an outdoor boiler. If I understand you correctly, you're trying to make your Mom's rental unit more attractive to potential renters by giving them the option of wood heat. I'd be surprised if you find renters, even as yoopers, that would be more interested in your rental by the opportunity to find and feed that much wood.

If your heating bill is that high, the house probably has lots of opportunities to make it more efficient. Have you considered spending that several thousand dollars in other ways (more insulation, weather sealing, a better LP or nat gas furnace, etc.)?
 
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The gas furnace in there now is about 8 or 9 years old, it's an energy star one. I'm sure the house really needs some insulation issues fixed or weather sealing. If I actually lived there I could do more to fix it. My biggest problem is it is more than 1,200 miles away. And yeah I am definitely trying to make it more appealing to renters! The way I look at if I don't get that heating bill down somehow then I won't have a renter in the house. meaning that I'm paying the whole bill on that house. I inherited the house but I also inherited the mortgage to go with it.

the only good thing is the family about to move in the husband works in the woods and pretty much gets free wood
 
I am a landlord with 2 cabin/house units and from my experience with tenants in today's world, you will have a difficult time finding the right people to rent from you with wood heat. I have a wood boiler to heat my own house, and it has to be a passion to do all that is required to do it successfully. I have a hard enough time getting tenants to keep their grass cut or shovel the snow from the driveway , much less keeping a wood boiler or furnace going. There is important maintenance/cleaning etc to to do on woodburning systems that I can see not getting done with renters. I would never consider adding ANY kind of wood burning appliance to either of my rentals with this in mind. I think you'd be better off using the money you were going to put toward a wood burning system into tightening up the house with insulation, windows etc. gotta go load the boiler! Good luck
 
Thanks, that's a pretty good break down. Did you do all the work and the Hvac guy just showed up and did the final tie-in? If I subtract the cost of your boiler that's way under the $4,600 quote I got. How much underground pipe did you buy?

Mine will be going into a crawl space under the house, I can't get a trencher under there. Do you think I'll have to dig a trench under my crawl space three feet deep? Or maybe a shallow trench then bring it up to the floor penetrator? Or with all that insulation on the lines can I just leave it exposed in the crawl space?

Yes apart from the hvac tie in I did all the work myself. Poured the concrete, dug the trench, plumbed the boiler, ect.

I bought about 60 feet of underground pipe. It goes from the boiler to the house buried 3 feet deep. Once it enters my crawl space I switched over to the cheaper insulated pipe from badger pipe. It's the wrapped kind without the drain tile, it just lays on top of the ground in my crawl space for another 80 feet till it reaches the heat ex.

I know how everyone here feels about the wrapped pipe but in my crawl space I can't imagine it will ever be a problem for me. My crawl space is dry and a constant 65 degrees, so no need to bury it. Theres no way I would pay for logsol pipe if I was installing it unburied in a dry warm crawl space.
 
I'm with the others about tightening up the home. While there's good tenants that burn wood, there's also alot of bad. With the cost currently to heat the home, it will translate into alot of wood. Of course we burn wood, but we only burn 3.5 to 5 cord a year depending on weather. I do however have friends with homes that need insulation/airsealing and they burn up to a cord a week in the wintertime. That's a full time job on top of their full time job. The other problem, if they decide it's too much work and let it go, it freezes and something busts, there's your investment. Get a blower door test done with an infrared camere and go from there. For 4,600 install plus 2,000 furnace, that would easily be enough money to tighten up that home. Not only would the heating bill be nice in the winter, but they will see comfort and reduced cost in the summertime. Trust me, I've seen the benefits of airsealing and insulation first hand with our old victorian.
 
I know right now I've got snow on the ground up there in michigan but this guy isn't even trenching the line. And his quote doesn't include a cement pad for the boiler. His quote was just to lay the line on top of the ground until I could trench it in the spring. I just feel his quote is high for what he's actually going to do, I can't shake that feeling

I have that feeling too, for what he is (or isn't) doing. It would also be pretty tricky burying the pipe later, there would need to be quite a bit of extra pipe laid out now & the right length to avoid having to take it apart later & splice more in - and splicing is something else to be avoided if possible.

You're in a tight spot - if the renters decide to let the fire go out in the OWB because it's too much work, or if something comes up & they move out & there's nobody to keep it going, your investment is much at risk. Once you put one of these in & fill it up, the fire needs to be kept going all winter or it will freeze & bust. I don't think I would do this if I couldn't be there all winter to keep the fire going - a wood stove or wood furnace in the house, maybe.
 
Yes apart from the hvac tie in I did all the work myself. Poured the concrete, dug the trench, plumbed the boiler, ect.

I bought about 60 feet of underground pipe. It goes from the boiler to the house buried 3 feet deep. Once it enters my crawl space I switched over to the cheaper insulated pipe from badger pipe. It's the wrapped kind without the drain tile, it just lays on top of the ground in my crawl space for another 80 feet till it reaches the heat ex.

I know how everyone here feels about the wrapped pipe but in my crawl space I can't imagine it will ever be a problem for me. My crawl space is dry and a constant 65 degrees, so no need to bury it. Theres no way I would pay for logsol pipe if I was installing it unburied in a dry warm crawl space.


That's probably what I will do, once I get under the footing I will bring it up either shallow or on top of the ground.
 
I have that feeling too, for what he is (or isn't) doing. It would also be pretty tricky burying the pipe later, there would need to be quite a bit of extra pipe laid out now & the right length to avoid having to take it apart later & splice more in - and splicing is something else to be avoided if possible.

You're in a tight spot - if the renters decide to let the fire go out in the OWB because it's too much work, or if something comes up & they move out & there's nobody to keep it going, your investment is much at risk. Once you put one of these in & fill it up, the fire needs to be kept going all winter or it will freeze & bust. I don't think I would do this if I couldn't be there all winter to keep the fire going - a wood stove or wood furnace in the house, maybe.
 
I agree with the guys that said the quote was about right. I did every bit of install myself; buying parts, digging trench, setting boiler on pad, pouring pad, plumbing everything. The only outside help I paid for was a guy to help me install duct work in my garage and that was only $300. But with all the little parts you forget about once you start putting things in it adds up quick. I had about $3,500 in my install alone. I did have cost of concrete, insulation, and building materials that you may not have but that's what I paid.