Savot wrote: ↑
Sun Dec 04, 2022 7:17 pm
While it heats the house well we have noticed a few issues. We're still using quite a bit of wood, which I've had to buy because the wood I stockpiled hasn't dried enough yet. Hopefully this will be less of an issue once I gather and dry enough to be a season or two ahead. Using the stove can also be dirty, with ash and bits of wood around the hearth making a mockery of the concept of not bringing dirt into a Japanese house. It also takes a bit of time to get the fire going and to heat up the house in the morning (~1 hour). I'm hoping to source enough hardwood to be able to burn overnight. The most annoying issue though is the occasional smoke blowback we get. I installed the chimney myself, and I'm pretty sure this happens because I used single-wall for the outside section and the chimney is not quite high enough (the geography in my area also doesn't help). We're using a blowtorch to heat up the chimney before lighting a fire in the morning, which helps.
All-in-all, we're very happy with how things have worked out. With the subsidy for the local government the total cost was only 30 man. I think we could have gone for more expensive stove and/or chimny but I'm not sure the benefit would have been worth the extra cost.
Sounds like your stove is helping you stay comfy.
One hour to heat your house up isn’t bad. We have earthen interior walls that take a long time to warm up so it takes a half day if we’ve been a way for a while in winter. Those walls also hold heat after the stove cools off so they definitely help balance out temperature.
If you load more small pieces you’ll get a hotter fire quickly and that will help heat your house more quickly. It will also get your stove hotter and risks over fire so keep an eye on things. I save my itty bitty bits and pieces from chopping and trimming and put them in a box or an old envelope I can throw in easily. That’s how one friend puts his junk mail to good use.
Using (a) circular fan(s) is a good way to direct heat where you want it or just even out high and low temp areas. You can also close doors to rooms/areas you don’t plan to use soon so you can concentrate heat on the areas you want to warm up faster.
We have a similar single walled stove pipe to yours. We also get occasional back draft on very windy days with a small fire or when we’re trying to start it and there is an exhaust fan running somewhere in the house- easily resolved by turning off the fan or opening a window for a few minutes till there is a good fire pulling hot air up the chimney.
Upgrading to double walled pipe is something I want to do for the exterior section but it is an investment.
We have the liquid creosote issue Zasso spoke of. I created a slight grade in the horizontal section where the pipe passes through the wall so any liquid will flow away from the stove and drip (into a bucket I save to spay on trees and garden pests) from the outside elbow. That liquid was saturating the dry creosote buildup which caused a horizontal section of “stainless” steel stovepipe to rust after 4-5 years of use. There was also rain entering where the pipe sections joined.
I replaced that section of rusted horizontal pipe with a spare piece I had and caulked the exterior joints with high temp silicone this year (I suspect regular silicone would work at those temps but didn't want to push my luck any more). I also drilled a small hole at the bottom of the outside elbow to help any liquid get out faster. I plan to clean out any dry creosote from the horizontal section where it passes through the exterior wall more often- probably should do that tomorrow.
That got quite long but it might be of use to someone.