P43 Starting 24 Hour Burn Test

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
On low, like idle or just above idle, certainly under 9-10 o'clock on the dial (imagine idle = 7 o'clock, and wide open = 5 o'clock), 24-30 hours per 40 pound bag but I tend to refill it at half. 1992 VC Reliance running Hamer's Hot Ones pellets. I can crank it up, but it'll run a body out of the house in a hurry. 🥵

What is "creosote"?;lol
 
  • Like
Reactions: Washed-Up
On low, like idle or just above idle, certainly under 9-10 o'clock on the dial (imagine idle = 7 o'clock, and wide open = 5 o'clock), 24-30 hours per 40 pound bag but I tend to refill it at half. 1992 VC Reliance running Hamer's Hot Ones pellets. I can crank it up, but it'll run a body out of the house in a hurry. 🥵

What is "creosote"?;lol
I hope I don't have a spelling mistake? Creosote is a flammable, tar-like substance that builds up in chimneys when wood is burned. It can cause chimney fires, structural damage, and health problems.
I am to understand I don't need to worry about creosote? I have bad memories of a masonry woodstove chimney fire. Looked like glass and totally plugged the tile then caught fire and I stood there watching to see if my house would catch fire. After that they had just brought Nat Gas on my street and switched to gas
 
cut & past from University of Idaho
UI Extension Forestry Information

The combustion process when wood is burned is never complete. The smoke from a wood fire usually contains a dark brown or black substance which has an unpleasant odor. This tar-like substance is called creosote and is found almost anywhere in a wood heating system, from the top of the chimney to the stove or fireplace itself .At temperatures below 250ºF creosote will condense on the surfaces of stove pipes or chimney flues. When the temperature gets below 150ºF the creosote deposit will be thick, sticky and similar to tar. Creosote consists primarily of methanol (wood alcohol) and acetic acid. The acid tends to trap carbon from smoke which dries and bakes inside pipes and flues. The flaky substance is very flammable.
 
It was "in jest" that I asked "What is "creosote"? ;lol " . I'm fairly familiar with creosote, I've had and been around a few wood stoves, and even seen flue fires that roared, but they were wood stoves or fireplaces, where active flames are licking upwards at any accumulated creosote in a flue. The only thing I've found in my pellet stove's flue is a black ash, maybe even some minute traces of sticky black ash in the cleanout's upside down cap, but I don't see a flame path from flame to the flue up out of a fire box, down the back side past the heat exchanger tubes and out through a near floor level mounted combustion blower's blades.

I've never left home with a fire going in a wood stove or fire place, nor would I now. I've never shut my pellet stove down to go to work or anywhere else ... unless I was anticipating it maybe running out of pellets before I returned as that leads to smoky smell and wear on the auger.
 
Last edited:
  • Like
Reactions: Ssyko and Washed-Up
I've never left home with a fire going in a wood stove or fire place, nor would I now. I've never shut my pellet stove down to go to work or anywhere else ... unless I was anticipating it maybe running out of pellets before I returned as that leads to smoky smell and wear on the auger.

The stove should shut itself down after a short time once it runs out of pellets. It should not lead to a smokey smell as the exhaust fan will continue running until the ESP senses there is no more flame (actually, the temp goes low enough). The augur will only try to feed for maybe 20 minutes (not continuous) and then the stove will stop trying and show a 6-blink error code.
 
  • Like
Reactions: johneh and Ssyko
It was "in jest" that I asked "What is "creosote"? ;lol " . I'm fairly familiar with creosote, I've had and been around a few wood stoves, and even seen flue fires that roared, but they were wood stoves or fireplaces, where active flames are licking upwards at any accumulated creosote in a flue. The only thing I've found in my pellet stove's flue is a black ash, maybe even some minute traces of sticky black ash in the cleanout's upside down cap, but I don't see a flame path from flame to the flue up out of a fire box, down the back side past the heat exchanger tubes and out through a near floor level mounted combustion blower's blades.

I've never left home with a fire going in a wood stove or fire place, nor would I now. I've never shut my pellet stove down to go to work or anywhere else ... unless I was anticipating it maybe running out of pellets before I returned as that leads to smoky smell and wear on the auger.
Yes I had assumed you were making a little joke, but I was interested in finding out from someone else what to expect. I have only done one little cleaning so far and did get into the area past the combustion fan. It all looked like dry powder soot. I agree re wood stoves verses pellet stoves. The pellets burn so clean and hot it must send most of the gases right out. Much different than a smoldering wood fire going into a masonry chimney. Of course these days I assume no one uses a masonry and use double wall to keep the flue gasses hot. Even then I do know they have chimney fires as my install told me he just had to replace a DW chimney. The bad thing about wood is you need to be in control of combustion and that verses heat control is too hard. I LOVE this pellet stove. I get a flame to look at when I'm there, and it is heating the basement 24/7and hopefully helping upstairs. I have another plan underway to make a 1st floor register. Also, I am starting another test today to see how many pellets I burn with the dist fan on low instead of off. I did run it that way overnight and there is no difference to me in the basement heat. No fan was fine, as I have a big raised fan next to the stove for room air distribution
 
At 9am Atlantic time I filled my hopper to about 2 inches below the cover and made a mark. Tomorrow I will refill it and keep track of the number of full and partial bags. We are going to be about -5C on average. I am at the lowest heat setting on stove mode, with no room dist fan running. If anyone has some previous data or want to start a test me me that would be great.
Finished another test running the dist blower on low. Stove mode min heat setting. Had to turn the feed rate to 1.5 otherwise the flames were getting too high once and awhile. I'm sure I would have burned more pellets if I had left it on 3 like my previous test (no fan).
Burned 40.8 lbs. Basically the same as no fan. I don't know if I produced more heat as my basement temperature was the same.
I am working on a floor vent on the 1st floor and hope to get some cold air introduced to the bottom of the stove. After that I should see some major changes and will retest.
 
  • Like
Reactions: bogieb
Finished another test running the dist blower on low. Stove mode min heat setting. Had to turn the feed rate to 1.5 otherwise the flames were getting too high once and awhile. I'm sure I would have burned more pellets if I had left it on 3 like my previous test (no fan).
Burned 40.8 lbs. Basically the same as no fan. I don't know if I produced more heat as my basement temperature was the same.
I am working on a floor vent on the 1st floor and hope to get some cold air introduced to the bottom of the stove. After that I should see some major changes and will retest.
I keep the P43 feeder at about 1.5. I do that because if I set the feed rate at 3 or 4:
  • The air thru the the bedrooms that are past where my thermostat is don't get a chance to warm up
  • The living room temp gets to be in the high 70's - which is way too hot (at lower feed rate, the LR will be in 73-75F while stove is running)
  • The stove can short cycle during warmer days which wastes pellets and electricity
Even the times I turn set it to a constant burn, instead of being controlled by the thermostat, I use the feed rate to modulate the house temp and will have it set anywhere from 0.5 to 1.5 (very rarely do I get up to 2 - negative teens and high wind will do it though)
 
I keep the P43 feeder at about 1.5. I do that because if I set the feed rate at 3 or 4:
  • The air thru the the bedrooms that are past where my thermostat is don't get a chance to warm up
  • The living room temp gets to be in the high 70's - which is way too hot (at lower feed rate, the LR will be in 73-75F while stove is running)
  • The stove can short cycle during warmer days which wastes pellets and electricity
Even the times I turn set it to a constant burn, instead of being controlled by the thermostat, I use the feed rate to modulate the house temp and will have it set anywhere from 0.5 to 1.5 (very rarely do I get up to 2 - negative teens and high wind will do it though)
Thanks for the info. Yes, as far as I can figure out reading all the available info, the feed rate dial sets the "ON" time for the feed motor per minute but the control board can go x% above and below that to try and regulate. This ends up lowering your stoves max BTU input (and output by default). I am not heating my entire house (although I am working on a new vent today),so I have been trying to run it at the lowest settings. I am below the lower spec 23,900 BTU/Hr for sure.
 
Whitenuckler when you did the test with the distribution fan at minimum did you take the same quantity of wood pellets
I have a p68 in the basement and I operate at room temperature with the distribution fan at minimum and the air comes out warmer so it is easier to go upstairs
 
Whitenuckler when you did the test with the distribution fan at minimum did you take the same quantity of wood pellets
I have a p68 in the basement and I operate at room temperature with the distribution fan at minimum and the air comes out warmer so it is easier to go upstairs
It was a few pounds less without the dist fan. Might as well say it was the same. I figure might as well run the fan on lowest setting and getting more heat out due to the gain in efficiency. I just started my vent project, so it will be interesting when I start blowing cold air from my bedroom right next to the dist air intake. That air will get heated and want to go up the stairs. Then in the summer I can reverse my duct fan and blow cold air into my bedroom.
 
Thanks