Chubby Sr central heat

Chubby Sr central heat

PostBy: the snowman On: Sun Mar 09, 2014 1:11 pm

Here is a question,

Has anyone tried to hook a Chubby Sr with the factory installed blower system into an existing forced air heating system? I have seen members hook up stoker stoves into forced air systems by attaching a duct to the front of the stove and plumbing that into the hot air duct of the existing system. The return air duct of the existing system was then plumbed to the intake of the blower motor on the coal stove.

I know some members have had some success with doing this, I just want to know if any Chubby owners have tried this same technique.

The snowman.
the snowman
 
Hand Fed Coal Stove: Jotul 507
Coal Size/Type: Nut, Stove coal, Egg coal

Re: Chubby Sr central heat

PostBy: ONEDOLLAR On: Sun Mar 09, 2014 2:03 pm

Snowman

Don't know myself but I will ask Larry tomorrow. I don't see why it wouldn't work though.

edit: Snowman... Just talked to Larry and he isn't aware of anyone who has done this....
ONEDOLLAR
 
Hand Fed Coal Stove: 2014 Chubby Prototype
Baseburners & Antiques: Crawford #2 Base Heater
Coal Size/Type: Nut/Anthracite

Re: Chubby Sr central heat

PostBy: the snowman On: Sun Mar 09, 2014 4:39 pm

onedollar,

What does Larry think about the idea? I thought I read on the forum Larry was in the process of making a whole house furnace, is this true? The real question is, would the Chubby Sr be able to produce enough heat at say 400-500F to overcome the heat loss of pumping heat through the uninsulated trunk lines of the existing hot air system. Maybe hooking up two Chubby Sr's into the hot air system running at 400-500F would be enough. In NYS is it legal to run two stoves into the same chimney? I know it can be done, however, is it legal in NYS? Thoughts.

The snowman.
the snowman
 
Hand Fed Coal Stove: Jotul 507
Coal Size/Type: Nut, Stove coal, Egg coal

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Re: Chubby Sr central heat

PostBy: windyhill4.2 On: Sun Mar 09, 2014 4:46 pm

What would be the point of hooking 1 or 2 chubbys to duct,sell the chubby,buy a 1 furnace capable of doing the job properly,ck. the for sale items in classifieds .
windyhill4.2
 
Stoker Coal Boiler: 1960 EFM520 installed in truck box
Hand Fed Coal Stove: Crane 404 with variable blower
Coal Size/Type: 404-nut, 520 rice ,anthracite for both

Re: Chubby Sr central heat

PostBy: the snowman On: Sun Mar 09, 2014 9:43 pm

windyhill4.2,

I do not believe selling the two Chubby stoves would generate enough money to purchase a good used coal furnace or even a new one. A lot of extra cash would have to be added to what was received from selling the Chubby's to purchase a good used or new furnace. I believe it comes down to would the use of the one or two Chubby's work instead.

The snowman.
the snowman
 
Hand Fed Coal Stove: Jotul 507
Coal Size/Type: Nut, Stove coal, Egg coal

Re: Chubby Sr central heat

PostBy: ONEDOLLAR On: Mon Mar 10, 2014 9:47 am

Snowman

Larry was curious to see if it would work. Well more of "How well" would it work. Yes Larry is working on a Chubby Furnace product. It is in the pipeline but right now I am pretty sure it is at the back end of said pipeline. :D
ONEDOLLAR
 
Hand Fed Coal Stove: 2014 Chubby Prototype
Baseburners & Antiques: Crawford #2 Base Heater
Coal Size/Type: Nut/Anthracite

Re: Chubby Sr central heat

PostBy: michaelanthony On: Mon Mar 10, 2014 10:33 am

Hi Snowman, can you put up some pic's of the location of the chubby or chubby's in relation to the warm air plenum? I have an old box stove that I connected to my cold air returns and the blower from the stove pumps hot air into the duct work. This is located in a unfinished basement I could put up walls surrounding the stove to improve efficiency but my situation would not be practical. I think you could make or buy a metal shroud around you stove to capture the heat as well and let your furnace blower do the work (they are much stronger than a stove blower)
My stove does a good job until the temps fall below 25* and heating my unfinished basement is inefficient and not needed. Good luck.
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michaelanthony
 
Hand Fed Coal Stove: Vigilant 2310, gold marc box, vogelzang pot belly coat rack
Coal Size/Type: Pea, and a little nut
Other Heating: Very cold FHA oil furnace

Re: Chubby Sr central heat

PostBy: Sunny Boy On: Mon Mar 10, 2014 10:53 am

The old coal "Octopus" convection furnaces that were used in many homes before WWII, had just sheet metal panels hanging in a frame around the cast iron furnace. They extended from floor level up to were they connected to the ducting to upper floors. They covered everything but the front of the furnace loading doors and dampers.

About 10 years ago, the girl friend was thinking of moving. We looked at a house just outside Saratoga Springs that still had the old octopus furnace, but converted with an oil burner gun in the old ash door. It had 8 inch ducts angling up out of the top leading to the parts of the house. The sheet metal panels that made up the surround were just held to a frame work with a few screws.

The octopus furnace that had been in my house drew cold air from a covered trench (chase) in the dirt floor that lead in under the sheet metal surround.

That coal furnace heated 4000 sq. ft. of two story, 17 room, uninsulated house by natural convection alone. But, the smallest ducts are 8 inch diameter and the ones farthest away from the furnace are feed by much larger rectangular ducts. Using smaller ducts then that, I think you'd have trouble getting air to move with needing electric fans. Then, you'd risk no heat during a power outage.

Paul
Sunny Boy
 
Hand Fed Coal Boiler: Anthracite Industrial, domestic hot water heater
Baseburners & Antiques: Glenwood range 208, # 6 base heater, 2 Modern Oak 118.
Coal Size/Type: Nuts !
Other Heating: Oil &electric plenum furnace

Re: Chubby Sr central heat

PostBy: the snowman On: Wed Mar 12, 2014 12:22 am

michaelanthony, I don't have pics, however, the Chubby Sr would be next to the current oil fired unit. The plan would be to tap into the cold air return as well and plumb that to the intake of the Chubby fan.

Sunny boy, The ducts are large enough so no real concern about moving air, however, they are uninsulated and there is my concern. I'm believing the heat loss of the uninsulated heat ducts would be greater than the Chubby would be able to overcome. The heat ducts do however only supply heat to the first story. The house has old fashioned registers in the floors to allow heat to rise into the second story. So, maybe just maybe since the trunk line is short and only pumping air to the first floor, the Chubby might be able to get the job done.

Another question, how hot would the Chubby have to be run? Another question, coal consumption. I know two Chubby's burning at a lower temp use less coal than one running full tilt. Also the burn times are a lot longer with two burning low compared to one burning full tilt. No concerns about power outages, house has a back up generator and since the Chubby is hand fed if the power went out the Chubby would become a radiant heating stove. The door to the basement could be opened to allow the heat to rise to the first and second floors.

I've seen one of those octopus furnaces. The one I saw was a large beast. The owner still used it and burned coal. He was heating a large three story home and would burn ten ton of coal per year. Ouch! The last time I talked with the owner he was working on replacing all the single pane windows and insulating.

The snowman.
the snowman
 
Hand Fed Coal Stove: Jotul 507
Coal Size/Type: Nut, Stove coal, Egg coal

Re: Chubby Sr central heat

PostBy: dcrane On: Wed Mar 12, 2014 4:07 am

common guys... this is NepaCrossroads... we can do anything... It's done. My Chubby Stove Heat Exchanger Retrofit.
dcrane
 
Hand Fed Coal Stove: Crane 404

Re: Chubby Sr central heat

PostBy: michaelanthony On: Wed Mar 12, 2014 6:59 am

[quote="the snowman"]michaelanthony, I don't have pics, however, the Chubby Sr would be next to the current oil fired unit. The plan would be to tap into the cold air return as well and plumb that to the intake of the Chubby fan.

Sunny boy, The ducts are large enough so no real concern about moving air, however, they are uninsulated and there is my concern. I'm believing the heat loss of the uninsulated heat ducts would be greater than the Chubby would be able to overcome. The heat ducts do however only supply heat to the first story. The house has old fashioned registers in the floors to allow heat to rise into the second story. So, maybe just maybe since the trunk line is short and only pumping air to the first floor, the Chubby might be able to get the job done.....The snowman.[/quote]

Nothing ventured, nothing gained! I say go for it and let us know about your progress or distress, it's all a learning experience! You mention heat loss, how much could there be with two chubby's heating the basement :idea:

Mike.
michaelanthony
 
Hand Fed Coal Stove: Vigilant 2310, gold marc box, vogelzang pot belly coat rack
Coal Size/Type: Pea, and a little nut
Other Heating: Very cold FHA oil furnace

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