Piping Into Ductwork

Dwelch0 · Post by **Dwelch0** » Fri. Jan. 30, 2015 3:45 pm

I think I have a similiar setup as you. When my stove was installed in my basement the company that hooked it up ran an 8" insulated duct line into the cold air return of my oil burner duct work. He said the heat would rise through the vents and all would be good. Well, it wasnt. All I did to fix it was buy a new thermostat for the oil furnace that had a fan only postion on it. Installed that and now I just let the fan on the oil furnace run all winter long. It sucks the hot air from the coal furnace and blows it out through all the duct work in each room and the cold air returns cycle it back through again to mix with the hot air. Sure its a little noisy and the air coming out the duct work doesnt feel real warm to the touch but our house will stay at whatever temp we set the coal furnace thermostat to. Our house is a 1.5 story and only around 1400 sq ft but the half we havent remodeled has no insulation at all and we live in Garrett County MD on top a Mountain where the wind never stops. Maybe give that a shot and see what happens.

TracyG · Post by **TracyG** » Fri. Jan. 30, 2015 4:30 pm

Thanks but yes I've done that. My thermostat has a fan only setting. Temp never got above 63 and that's when the suns out shining on the house. I'm really disappointed and frustrated. I've unplugged the stove and using oil again. One stove co I talked to said if a customer wants a stove piped in they tell them to call an HVAC guy. I've called afew and no one wants to deal with it.

mariohotshot · Post by **mariohotshot** » Sat. Jan. 31, 2015 5:45 am

The furnace blower is probably too strong and cooling down the warm air that the coal stove is producing. I would remove that out of the equation for now.
I would insulate the length of the stove pipe to the furnace as mentioned before.
Try to loop the return from the furnace to the return of the stove, this way the return air goes through the stove.
As one member mentioned, the air may not be warm to the touch, but with proper air circulation it will start to balance and feel comfortable. Dont give up, I've been there!

Preemo · Post by **Preemo** » Tue. Feb. 03, 2015 8:09 pm

I just found this thread

can I ask.. why would the furnace be installed into the return air? that makes no sense.

In theory you're cycling the hot air back into the furnace, and not moving any of the heat. so it makes sense that area of the house is hot, the heat isn't going anywhere and the radiant heat is great.

If I were you, i'd rerun the duct into the supply ductwork and leave the existing furnace fan on auto to move the air.

apologize if this was already answered or suggested.

p.s. thats how my Hitzer 710 is ran (into the supply ducts) and my house is equally warm

plumberman · Post by **plumberman** » Wed. Feb. 04, 2015 4:27 am

i also just saw post, personally I would move pipe over to supply side and insulate it also. I would the start with furnace fan off and give the coal stove a chance to work. if s still not happy try running fan only on furnace to help move air. then in last place would be coal/oil combo, you set t-stat at where you want it if coal can't keep up oil kicks in as needed. don't know if hvac guys are scared of "coal" or afraid of inheriting someones else problem, just tell them this is what you want done. from the picture it looks straight forward work, get price first, ask neighbor/co worker for possible company? good luck

mariohotshot · Post by **mariohotshot** » Wed. Feb. 04, 2015 9:23 am

My coal stove is hooked up to the supply side of my furnace and it works well. I don't know why installers use the return side. The only reason I can see using the return side is to utilize the furnaces filter.