Photog200 wrote:Windyhill 4.2,
I don't know how many BTU's the stoves put out but I can give you an example as to how well my stove heats my garage area. My garage is 24'X26', the walls are 2"X4" with insulation in them. Last fall I blew in 18" of cellulose in the attic. Last night it got down to 30°, I filled the stove with coal at 8pm. I went out at 6am this morning and it was 70° and still had lots of coal left to start the fire over with. This was with the oven door cracked open an inch because I am trying to burn off the fumes from painting it yesterday. With the door fully open, it would have been even warmer in there. I had the dampers shut down pretty good so that it would last all night.
Hope this info helps out. I am sure Paul (SunnyBoy) will fill you in on his setup too.
Thanks Phototog200 ,very good info that is indeed helpful,loved the paint upgrade/lighting improvement you made to yours.We would like to get close to an 8 hr burn + have decent heat output if possible,however we think tending this even in the middle of the nite,inside the house,in the warm will be nicer to do than bundling up to tend the outdoor wood monster,not to mention the warm radiant heat that a wood or coal burner provides that cannot be gotten with hot air heating.
My 1903 Glenwood Sunny is at the small end of the typical kitchen range size. The firebox is a bit small in comparison to coal ranges of only a few years later design. It still has the original firebox cast liners that are a bit thicker than many of the new liners of restored stoves I've seen pictures of on line. Plus, from all the years of use, they have about a half inch thick layer of coal clinker scale fussed into them making the firebox even smaller then it was originally.
At that, loaded up and damped down, with the MPD closed (type with holes in it), it will easily go 10-11 hours through the night. When I come down in the mornings, the left hand top plates are anywhere in the 600 - low 700 degree range. The right end of the stove top, farthest from the firebox, is about 250. The right side of the water tank casing is about 120-130. The stack temp, 36 inches up from the stove top, is anywhere from 105 to 115.
Lately I've been using a manometer and writing down the readings each morning. They range from .005 to .01. The kitchen is 68 - 70 degrees and it's a large ,uninsulated kitchen with high ceiling, the back door right next to the stove, three other open doors to other parts of the house, and tall windows. The air register leading up to my bed room is 78 degrees.
The large Copco tea kettle, which sits on the back middle burner, is just below a boil - the perfect temp I like for making my instant coffee ! No waiting - and no electricity needed !
I open all the dampers, give the old girl her morning shake, add three scoops of fresh coal and within about 10 minutes, she's quit all her crackling and up to daily operating range.
As far as BTU's. I've been using her for 8-9 months of the year, for 8 years now. Very often, keeping track of coal use and average temperatures. But, I've never tried to equate those numbers to be comparable to modern heating appliances. Simply put, for those eight years, she's been averaging a coal bucket a day. My two antique coal buckets are a #16 and a #17. Both hold about 25 lbs of nut coal, give or take a pound.
During the day I run her a bit hotter than all damped down for night. However, the stack temps 36 inches up from the stove top, still stay in the low 100 degree range. I've been keeping the mano in the .02 range unless opening up the dampers more to get the mano up to .03 - .05 to do a lot of cooking.
This afternoon we are going to be doing canning. It's in the low 30 degrees here today. Because we use a couple of very large pots full of water to boil the canning jars in, I'll be running her hotter - so I'll probably go through about 30 pounds today.
In the coldest parts of our winters here in the CNY hills, we can go for many days/ weeks and not get above zero. At those times, she'll use about 30 pounds of nut coal a day and the kitchen stays at about 70 degrees.
Hope this helps,