Thank you everyone for your thoughtful replies. VERY helpful.
So, it would seem there are a few take-aways from the above conversation - and from my additional reading. Please feel free to correct me if my understanding is wrong!
- Use largest splits possible.
- Pack the stove fully when loading.
- Use the fan minimally, if at all.
- Turn the thermostat down as soon as combuster is in the active zone - assuming the goal is long burn times> maximal heat. No need to run on 'high' for 30 minutes after combuster is in active zone if the goal is long burn time and gentle heat.
- Try to keep the stove continuously hot during the season if intending to use as primary heat source.
- Use fully seasoned/dry wood. Don't rely on testing an existing face . . . split it and then test.
- Oak/hardwood takes a long time (several years) to season/dry fully, despite what the dealer may say. Splitting and testing on fresh face may show wood is not as dry as I thought.
- Try to use softer wood now. This is a problem for me given the time of year as there is/may be a limited supply of such wood in my area in late January and I would not have the opportunity to let sit for a year to season as I would like to use the stove now (it Christmas gift for the family).
- Try BioBricks, BioBlocks, NIELs (or similar products) - though financially this does not seem doable for the long haul (though I have not priced). Maybe trying a full load of these x 1 (vs indefinitely) will give me some information on burn times, but will not necessarily be reflective of 'real wood' burn times.
- The draft is excessive. That being said, there doesn't seem to be a definitive way to limit that (pipe damper or reducer were mentioned as options - but no consensus and would be a hassle/costly with ? return on investment).
I do have some additional questions and concerns . . . . I have included some pictures for reference - the stove fully loaded and pictures of the fire ~ 30 minutes into active zone, fan off, thermostat at 7 o'clock (lowest setting possible).
- I assume everyone is saying the draft is excessive because of the stated length of my chimney. I don't know if there is a way to measure draft, or if there is a way to modify it (damper, reducer) that has been shown effective.
- My house is from the 1930's and leaks. Would sealing those leaks - assuming I could - reduce the draft?
- It is not quite clear to me why unseasoned/wet splits would result in a SHORTER burn time. I am not the sharpest knife in the drawer, but I would think wetter/unseasoned splits would take LONGER to burn (though less efficiently) than fully seasoned/dry wood. I assumed - appparently erroneously - that seasoned/dry splits would actually REDUCE burn times given that no heat energy is 'wasted' in dissipating the wood-contained water. Obviously I am missing something here (physics and/or common sense), so please clue me in!
- My picturesshow flames that are quite vigorous ~ 30 minutes into active zone, fan off, thermostat at 7 o'clock (lowest setting possible), damper closed/combuster activated. It would seem the stove is getting too much air. The installer reportedly checked the door seals. Short of adjusting the draft as per above - or removing half of my chimney - is there anything else I can do to limit the draft. Could the thermostat be broken/poorly calibrated? I don't think Blaze Kind performs house calls, and I certainly cannot return the unit for a refund
!
I have another question - not necessarily related to burn times per se . . .
- How do I OPTIMALLY RELOAD the stove when the current load is down to embers. I have been waiting until the needle drops to almost the inactive zone while leaving the T-stat on low. I open the damper, wait 1 minute, open the door, fully load the stove without adding additional kindling, close the door but leave cracked, turn the thermostat up high, and hope it catches. Usually the indicator drops to inactive during this process and I leave the damper open until it goes back to active . . . and then lower T-stat to low. That being said, there have been several/many times when the embers are not enough to restart the fire. This AM it was smoldering from last nights reloading attempt with the above procedure. There was no fire/flame. I took all the wood out and restarted it is if starting a new fire (newspaper, fatwood, kindling, damper open, T-stay on high, door cracked until kindling flame established, load fully with wood, wait until active zone reached, close damper and turn down T-stat to low - etc (as per my initial post above).
Again, thanks for all of the help you have provided . . . and will provide!
Tom