Handling/reducing ash on BK Princess 29 insert

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cr0

Member
Mar 6, 2023
37
SE PA
We're wrapping up our 3rd season with a BK Princess 29 insert. Getting the hang of it, hopefully getting our wood supply into a better rhythm (the spring shoulder season keeps finding me digging into wood not seasoned enough sadly). I'm a new woodstove operator but hope to use it for many years to come. Given one of the main hazards of wood burning when done correctly is simply the emissions, I want to get good at reducing ash and dust both indoors and out. Building up a supply to only burn very seasoned wood is a priority for sure.

Indoors, our stove generates quite a bit of dust. Some dust in our room is just from daily life but quite a bit no doubt comes from the stove. I think this is during reloads and especially during ash cleanout. What are your tips for reducing ash in those instances?

Currently I know what I do is not ideal. My only tools for reloads are leather gloved hands and a poker that came with the stove. I do the usual by-the-book prep to reload, then when the door is slowly opened, I use the poker tool to gently push any ash off the interior lip of the firebox or the front fire bricks, then use the poker to carefully drag larger coals toward the front/front-center of the firebox. Then I place logs in gently, front-to-back for bottom layer and side-to-side for top layer, usually smaller stuff on bottom and bigger stuff on top to fill that vertical space. If fire died down I put smaller kindling near the coals and leave door cracked until it catches. Or if cold starting, I setup kindling on top of a 3/4-full load and start fire from top, filling remaining load when it's ready for bypass closing. All this mostly works well but I could use a better rake or something to move coals around without disturbing ash as much.

For ash cleanout, I've got even more room for improvement. I use a 3gal metal bucket and a metal shovel to carefully scoop out ash, leaving about 1/2 to 1" layer of ash behind. My tools are similar to this but unpainted metal. I hold the bucket up against the firebox lip so most dust can vent out the flue, and I clean ash when the stove is warm (cat thermometer around 8-9pm) to help maintain draft up and out. But the bucket opening extends beyond the firebox opening and I see ash dust rise out above the bucket and into my living room. I also rub down paint on the stove lip in this process. Then I have a heavy and very hot bucket of ash and coals to set outside, while I then dust off my stove and living room. I run an air purifier while doing this and I'm sure it helps (it definitely fills up with dust!) but still many surfaces get dusty, stove included. Every now and then I also wipe the stove top with a moist cotton rag to try and reduce dust getting blown out by the fan.

How are you cleaning out ash and reloading the stove to minimize dust? Any favorite bucket and ash shovel combo that works well to do it all within the P29 firebox?
 
So the stove doesn't make dust. You make dust with your ash removal methods and maybe your fuel handling practices. So do I, it's pretty normal. With my freestanding princess I have an ash pan and I have found that using it almost eliminates ash dust. Not helpful for you though. On the fuel dust I store fuel outside and bring it in with a sling to be loaded. It's like a rectangle of fabric with handles on each end, you lay it on the ground outside and fill with wood then carry it in and open it back up on the hearth. Then roll it up afterwards with all of the dust fragments inside so no mess. It really helps with the fuel debris that so many people have problems with.

I used to use a shovel and bucket for ash removal. It's not easy to do cleanly. Cold ashes help since they don't float away as much. Dumping the ash with the bucket held mostly in the stove helps a lot as does minimizing the drop distance.
 
Cold ashes not floating away as much is an interesting point. I wonder the benefits of that vs. benefit of cleaning while the flue has warmth and some draft to it.

I do the same as you regarding fuel into the house, that works pretty well. I am also not concerned about wood dust, it seems benign for me and even kiddos, aside from an occasional splinter risk. My spouse is OK with the wood stove debris in general so that's a non issue. It's the ash dust on kids hands and particulate matter affecting air quality that we want to mitigate.
 
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Cold ashes not floating away as much is an interesting point. I wonder the benefits of that vs. benefit of cleaning while the flue has warmth and some draft to it.
Definitely clean out ashes when they are cold. The only time I get a coating of dust on the stove is when I have to do an emergency cleanout while hot. The hot coals in the ash provide ample power for ash thermals. It's almost zero when the stove is cold.

Other than that, I measure air quality near the stove, and yes, I do see the reloads on the PM. But nothing serious, I know that most of my ash/dust comes from the cleanout.
 
OK, that is good to know, thank you for helping bring a newcomer up to speed. So midwinter you skip a reload and let it cool down when you need to do an ash cleanout? I probably do about 3 cleanouts per winter.

Any tips on reducing ash when you do the cleanout, other than keeping it cold? I heard the tip of using a container that fits within the stove but I haven't heard anyone with a BK insert share any container that does that trick! I'll look around more on my own.
 
So midwinter you skip a reload and let it cool down when you need to do an ash cleanout?
Kind of. I live in a warm climate, so there are always days in "winter" where it's rather warm and I don't need the stove. But from the time of the last reload, it probably takes 36 hours for the stove to cool down enough.

My cleanouts are done with just a bucket with a tight lid and a stove shovel (just a shovel with a long handle, really).
How often that's needed really depends on the type of stove and the type of wood being burned.
We have a lot of gumtrees in our woods, but nowadays I just let the dead ones decay out there. It does burn and it does provide heat, but the amount of ash it leaves behind is just insane.
 
The one thing that needs to be mentioned is to use pine type softwood (dry of course) during daytime if big heat is needed, and definitely between sundown and bedtime. Save your hardwood for when you’re sleeping.
Where I live (southcentral Alaska, still pretty cold by lower 48 standards) we’re talking about white spruce and paper birch respectively.
If I burned birch around the clock, the (very deep) firebox would fill up with big coals within a very few days and one would either have to wastefully dig them out or take 2-3 days at a slow smolder, stirring frequently, to consume them.
Birch is harder to obtain; so I burn it on cold nights, use spruce after sunset to consume the previous night’s birch coals that have been producing a bit of heat between am turndown and sunset.
I only add spruce in the am when it’s both overcast and cold, typically in the weeks around the winter solstice.
As a result, I only dig ash out every 3-4-5 weeks.
 
On the other hand, I clean out ashes when the stove is rather hot, with at least half a cubic foot of glowing coals.
With (of course) the bypass open, I shove them to one side, use a metal kitty litter scoop to filter out any coals from the ashes (dump the coals on the pile), then when enough clean ashes are on the other side, I use a normal (long-handled - because hot..) scoop to scoop the ashes out.
I have a bucket in front of the stove that I tilt to the same angle as I have the scoop, and then I gently let the ashes slide into the bucket.
Any ashes floating up (with practice, the skill develops to really let the ashes slide as a contiguous blanket from the scoop onto the sidewall of the tilted bucket, or on the side of the pile of ashes in the bucket, leading to almost no ashes floating up), will be sucked into the stove and go up the flue.

So a combo of being careful/skill/practice and a hot stove and I don't have ashes coming out into the stove room (basement in my case).

So you gotta try what works for you...
 
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