rideau
Minister of Fire
Flame impingement is really not an issue with the PH. The air path to the cat is very long and convoluted: up into the upper chamber, to either side and to the back of the stove, then down toward the center (much of the ash carried in the air stream is deposited along the way - all of it if the air flow is not too brisk), before flowing up into the cat.
I found I had no increase surface ash build up on my cat after removing the screen.
Since adding the flue damper and slowing the flow of air, ash build up has been drastically reduced. I now just get a small amount (maybe 1/16 inch max) of surface coating of very fine white powder. The lighter color is indicative of the more complete combustion I am getting in the firebox with the decreased draft/increased time air is in the box, and the paucity of ash confirms the theory that the problem is primarily that of fly ash being pulled into the air stream by increased draft.
With the damper, I can burn with the stove as is, without adding an ashpan. Ultimately, I have to decide whether to settle for a quick clean of the cat from time to time and continue to enjoy the appearance of the stove without the ashpan, or install the ashpan and perhaps only have to clean the cat at the end of the burning season.
I will install the ashpan as a trial for the next burning season, just for final confirmation that doing so will eliminate the issue. However, I may remove it the following year, depending on how much more convenient I find both ash removal and (anticipated) lack of cat cleaning, as well as how much I find I notice/mind the changed appearance.
I do find the stove very handsome as I presently have it installed.
I found I had no increase surface ash build up on my cat after removing the screen.
Since adding the flue damper and slowing the flow of air, ash build up has been drastically reduced. I now just get a small amount (maybe 1/16 inch max) of surface coating of very fine white powder. The lighter color is indicative of the more complete combustion I am getting in the firebox with the decreased draft/increased time air is in the box, and the paucity of ash confirms the theory that the problem is primarily that of fly ash being pulled into the air stream by increased draft.
With the damper, I can burn with the stove as is, without adding an ashpan. Ultimately, I have to decide whether to settle for a quick clean of the cat from time to time and continue to enjoy the appearance of the stove without the ashpan, or install the ashpan and perhaps only have to clean the cat at the end of the burning season.
I will install the ashpan as a trial for the next burning season, just for final confirmation that doing so will eliminate the issue. However, I may remove it the following year, depending on how much more convenient I find both ash removal and (anticipated) lack of cat cleaning, as well as how much I find I notice/mind the changed appearance.
I do find the stove very handsome as I presently have it installed.