EarthWindandFire wrote:I didn't want to start a new thread but I'm having a few issues I need help with. First, I have hot coals falling off the grate even though I have the max feed rate cut down to just 15. That doesn't seem right and I may have to lower this even further.
Second, I installed the new Quiet combustion fan a few weeks ago. The fan is significantly quieter but the stove should be hotter than it is. The sides average 512 degrees and the stack temp is about 200 degrees. The FR (firing rate) is at 99 right now. My house is 960 sq feet Cape, four rooms on the first floor with open floor plan, a bathroom and two bedrooms on the second floor. One of the bedrooms is a spare, so the door is always closed, so I'm really just trying to heat 860 square feet. The first floor is heated to 72 degrees but the kids bedroom upstairs only gets to about 62 degrees, a ten degree difference, but the bedroom feels warm and the kids haven't complained.
The stove is located on the first floor, smack in the middle of the house. This should be the ideal location for a radiant and convective heating appliance. The stove uses very little coal, about 40 lbs per day. I am not frugal about coal use, I wouldn't care if it burned 10 tons per winter, I just want a warm house.
Any thoughts or suggestions?
P.S. Please don't suggest a boiler, this house isn't worth the trouble and cost.
EarthWindandFire wrote:I finally swapped out the combustion fan last night. The oem Fasco is back on the stove. However, my hopes for a miracle were quickly dashed when I took temp readings off the stove two hours later. The stove did indeed heat up, but only by 30 degrees. So, instead of 490 degrees maxed out, it heated up to 520 degrees. I have done everything possible to check settings and look for causes as to why I can't get enough heat.
I vacuumed under the grate, which was done during the rush to switch out the fan before the fire was lost. Stupidly, I used my wife's five hundred dollar Sebo vacuum and melted the hose. A replacement hose will cost me fifty bucks, that's my Christmas present to myself.
The stove is maxed out, the FR is 99 and I moved the feed rate back up to 18, which makes the hot coals go right to the edge of the grate. The grate is completely on fire, no dead-spots or plugged air holes. The coal-trol is set at 72 but the downstairs is just 67 to 69 degrees. The draft is a little high, but not by much.
This morning on the way to work I had an epiphany of sorts - how come I'm only burning one bag per day ???
It seems to me that a 70,000 btu coal stove at max burn should be using nearly three bags a day. I almost think I have the 40,000 btu burner from the original Hyfire installed by mistake. At 40lbs per day, the stove is only putting out 22,000 btu's gross per hour. It should be at least double that!
I just don't understand why others are heating houses that are 2, 3 and even 4 times larger than mine with the same size coal stove. The last two years I had the coal stove in the basement, the house was just as warm as it is now. This year, I move the stove upstairs, and its not any warmer.
Any thoughts or comments would be appreciated!
Rob R. wrote:Are you measuring the draft at the breech or over the fire?
Can you rewire the combustion blower to straight AC power and see if it changes speed?
EarthWindandFire wrote:I had to take a vacation day and stay home with the kids yesterday due to the snow. This gave me an opportunity to check the gaskets and the grate. All gaskets are installed and the gap between the blower box and the grate is so tight I can't even pass a butter knife in between.
I still can't get the stove to burn more than a bag per day.
It would be nice to hear from other Lil Heater owners. Am I the only one experiencing this problem of an under performing stove?
Owners of other brand stokers talk about their stoves being under-rated in btu output. I have the opposite problem, this stove is outputting less than a third of rated capacity.