Placement of MPD

Modern and vintage hand fired coal stove are similar to a wood stove and in some cases can burn either. They need to be regulated and fed by hand usually every 12 to 24 hours depending on your usage. They require no power to operate making them ideal for rural settings with long power outages.
Stngllhm
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Post Fri. Jan. 04, 2013 9:36 am

So I just got to mind wring if it matters how close your MPD is to the stove. The baro dampner said it needed to be 18 inches. But I mounted the MPD right above my elbow I've been doing alright with the stove I was just wondering if I should have spaced it out more. Here's a couple pics of my setup. Uploading from phone so sorry the pics are sideways.
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I'm On Fire
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Post Fri. Jan. 04, 2013 9:39 am

I've got mine right at the stove outlet.

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joeq
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Post Fri. Jan. 04, 2013 6:50 pm

I'm so confused. :? Don't think I've ever seen stove pipe running down to the floor. :?:
I got coal in my Christmas stocking. (Yey!)
http://nepacrossroads.com/about36489.html

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grumpy
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Post Fri. Jan. 04, 2013 6:59 pm

joeq wrote:I'm so confused. :? Don't think I've ever seen stove pipe running down to the floor. :?:
Yeah, whats up with that?

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I'm On Fire
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Post Fri. Jan. 04, 2013 7:53 pm

Looks like it's supposed to be drawing cold air to the stove. Missed that the first time I clicked this link.

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Lightning
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Post Fri. Jan. 04, 2013 8:22 pm

I'm On Fire wrote:Looks like it's supposed to be drawing cold air to the stove. Missed that the first time I clicked this link.
joeq wrote:I'm so confused. Don't think I've ever seen stove pipe running down to the floor.
What?? THose 8 inch off the top are running down to the floor and to the wall behind it..
You guys ain't lookin at it right hahahahaha toothy

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joeq
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Post Fri. Jan. 04, 2013 8:29 pm

Oh... now I understand. the stove is bolted to the wall. That makes sense. :D (Don't I feel fuelish?) :oops:
(Actually, now I "do" see the exhaust running to the chimney) still have never seen the intake on the floor, but I guess it works. Interesting.
I got coal in my Christmas stocking. (Yey!)
http://nepacrossroads.com/about36489.html

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Lightning
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Post Fri. Jan. 04, 2013 9:29 pm

joeq wrote:still have never seen the intake on the floor
intake on the floor? yer messin with me right? :lol: :funny:

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joeq
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Post Fri. Jan. 04, 2013 10:04 pm

"Am I on candid camera, or what?" You can't tell me the stove pipe coming out of the back of the top (which I'm assuming the top is opposite the ashes on the floor), is making 2 90* turns to the floor. I know cell phone pix aren't the best, but I "am" tilting my head sideways. I've tried putting my monitor sideways, but the picture keeps correcting itself like a compass. (Is the rear pipe the intake, or used for something else? Alright, I just "blew up" the photo showing the back of the stove, and understand the stack, but I'm still curious about the 2 pipes coming off the top going down )
I got coal in my Christmas stocking. (Yey!)
http://nepacrossroads.com/about36489.html

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I'm On Fire
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Post Fri. Jan. 04, 2013 10:22 pm

What I'm figuring is since the Clayton is technically an add-on furnace its got a jacket that is supposed to be ducted into your existing duct work. But, the OP has it setup as a standalone. So, he's got one 8" run coming off running to the floor as the return and the other 8" run is the supply. At least that is how I see it.

The black pipe is obviously the exhaust going into either a double or triple wall chimney.

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joeq
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Post Sat. Jan. 05, 2013 1:10 am

That sounds logical. But if the 2nd one is the supply, what's it supplying? it also appears to be directed down, at the floor. I'ld think it would go up to the main floor.(If it's a basement installation)
I got coal in my Christmas stocking. (Yey!)
http://nepacrossroads.com/about36489.html

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Lightning
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Post Sat. Jan. 05, 2013 3:59 am

OK let me help you guys out a little, apparently the orientations got y'all confused :doh:
IN the first picture look close at the back, you can see two dark cylinder objects at the bottom of the furnace. If viewing on a cell you may not be able to see them. Those are the blowers. They blow air into the back that travels up the furnace inside the air jacket and out of the two 8 inch metal ducts on top. Then the two metal ducts immediately turn 90 degrees to horizontal then another 90 degrees towards the floor then run along the floor to the wall behind it (I assume) to feed the house.
I'm On Fire wrote:So, he's got one 8" run coming off running to the floor as the return and the other 8" run is the supply.
Both feed the house warm air. I don't see a cold air return set up. Hopefully air from the house can freely make its way back to the furnace so he isn't pressurizing the house and loosing efficiency..

The second picture is the front of course. You can see the load door and underneath it is the ash pan door thats open.

Hope this resolves his set up for you :D
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joeq
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Post Sat. Jan. 05, 2013 10:09 am

Talk about me not being very observant. Now I see the frt pipe running rearward across the floor, so I guess if the pipe is "pressurized" due to a blower, then that would make sense. I was assuming these furnaces work off radiant heat, and forget about the blower options. So if the rear pipe isn't a return, then maybe it's blowing heat into the room the furnace is in(?) What happened to the OP?
I got coal in my Christmas stocking. (Yey!)
http://nepacrossroads.com/about36489.html

Stngllhm
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Post Sat. Jan. 05, 2013 1:33 pm

Yea the two 8 inch silver pipes go down under my house to tie into my existing heating ducts there wasn't enough room to put the stove next to the furnace so I built an add on to put it in and to keep the mess out of the house. As far as a cold air return haven't got one in yet. That will be my next project but as far as efficiency the stove is rated for more than twice what I'm heating so loosing a bit isn't a problem and I'm still saving money over propane. I do still need to add a couple of booster fans to the 8 inch ducts because the blowers on the stove are alittle lacking but since its just a steady heat it's working alright unless you let the fire burn down then it takes along time to get the house back up to tempurture.

Ps the house is a double wide so that was the other reason I wanted the stove outside of it. Not very many people have tried a set up like this that I could find. So it's all been an experiment

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Lightning
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Post Sat. Jan. 05, 2013 2:24 pm

Stngllhm wrote:I do still need to add a couple of booster fans to the 8 inch ducts because the blowers on the stove are alittle lacking

Before adding any booster fans I strongly suggest that you get a cold air return in place. I have this same furnace in my basement. I'm heating 2500 square feet which includes two levels (3 if you include the basement) and an attached two and a half car garage thats been converted into a living room.

Whats happening is you are pressurizing the house and the blowers are fighting against positive pressure in the house. Not only that but you are probably heating cold air which requires a huge amount more energy to heat than air from a cold air return that is already 65 degrees. Those blowers should be more than plenty for a double wide if you get a cold air return in place. I built a box around the blowers with tin and ran a 24x8 inch square duct to it.

Just for demonstration, imagine your furnace adds 50 degrees to the air passing thru it.
45 degree air (from the room its in) + 50 that the furnace adds = 95 degree air getting back to the house.

Now lets add the cold air return from the house
65 degree air (returned from the house) + 50 that the furnace adds = 115 degree air getting back to the house.

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