Mark III Newbie

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.
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Post Mon. Oct. 29, 2007 11:27 am

The house I just bought came with a Harman Mark III. It's missing a fire brick and looks like the asbestos wadding is missing around the glass. other than that it looks to be in good shape.

I've never owned or used a coal stove. Any advice would certainly be helpful.


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Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea
Location: Guilford, Connecticut

Post Mon. Oct. 29, 2007 11:46 am

Firebrick is available at almost any brickyard for about a buck apiece. Most stoves use what are called "splits" that are 1/2 as thick as a normal firebrick, about an 1 1/4" thick.
The gasket is a rope made from a fiberglass like material and is available at most stove shops in a variety of sizes.
Last edited by coaledsweat on Mon. Oct. 29, 2007 3:01 pm, edited 1 time in total.

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Stove/Furnace Make: AHS Multifuel
Stove/Furnace Model: CO 55 with oil backup
Location: Western Md.

Post Mon. Oct. 29, 2007 2:24 pm

Yep, coaledsweat pretty much answered that one. You can get the gasket at the local Lowe's also. If I were you I would fire that baby up and enjoy it.
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Post Tue. Oct. 30, 2007 8:50 am


The manual says I can burn pea, nut or stove coal. Any preferences on that?

Thanks for your help.

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Richard S.
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Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite
Location: NEPA

Post Tue. Oct. 30, 2007 9:00 am

Each will provide the equal amount of BTU's per ton but the the nut will burn faster, thepea will allow you to control it easier but takes alittle longer to get it ripping.

Stove is huge and not necessary, generally cost more too.
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Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Baseburners & Antiques: Sears Signal Oak 15 & Andes Kitchen Range
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert
Location: Stillwater, New Jersey

Post Tue. Oct. 30, 2007 8:09 pm


I have a Mark I, same design as yours only a lower heat output.

Just remember, the window has gasket material on the sides only, to allow secondary air to enter the stove, a sort of "air-wash" that helps keep the glass clean.

I use pea coal in my stove. The nut will work also, I did not have good results with stove size coal.
Heating a circa 1832 farmhouse with a Harman Magnafire Mark I & a 1959 EFM 350 (heating DHW).
100% Oil Free!
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