Like bren said, it's not an issue at all when not in the mode of trying to burn wood fast. Then it's just a minor nuisance. I don't ever load on a crazy amount of coals though, as this will only push the issue down the road and make it even a bigger issue then.
Type of wood also makes a big difference. I'd think burning pine during the real cold nights would work out great for needing to load aggressively. It doesn't leave much for coals and pretty much turns to powder. Just need to re-load more, as I could probably only fit 30-40lbs of pine in my firebox. I heard Elm is similar.
4.1CF for the VF100
Mine is a brick cape cod style from 1940, with ok insulation. 1200 sq ft basement, the same on ground floor, then another 650 sq ft upstairs. The basement is partially finished.
The high temp doesn't get triggered all the time, but yeah, I load on a bunch of coals every time when it's cold out.I'm curious. If you ignore the high temp alarm (which my understanding is mainly a warning) can you still load on decent coal bed with the coals over the grate? Not sure if you tried that... but I'd think you would have the same experience with the coals melting down faster?
Log cabin style with 23.5' tall 12/12 pitch roof. ~1,300SF main, ~1,300SF basement and an additional ~500SF loft. Have ~32,000CF of air space though due to the tall ceilings and no attic space. So equivalent airspace to heating a rectangle building with a 32'x42' footprint with almost 24' tall walls........or a 2 story home w/ 8' walls totaling ~4,000SF including the basement.
Very few pines in this part of the country. We are in prime hardwood country. The only pines that are around are in people yards.Gotta get your hands on some pine. Rake coals forward and toss a few splits on top wide open... good heat output and melts the coals to powder.
I found the same thing with ash (although I was burning borderline seasoned ash.)
My home is a ranch. We are heating approximately a little over 2,200 of living space plus a 768 square ft basement, so we are close to 3k square feet total. The 768 square feet of living space we added along with the basement is insulated extremely well ( R60 in the attic, foamed 2x6 walls, low E windows, foamed basement walls ) and the other 1,400 square feet is insulated okay.
Yeah I decided to do the same here this morning...thought it would only take me an hour...but it took 2 'til I got done screwing around...missed church services because of it...oops!Yesterday was above freezing and the house temp was high enough. I decided to shut down the Kuuma to clean the HX and to look at my stove pipe. I have had a OAK attached to my BD since the very first fire this fall and wanted to see how things looked after being sent ice cold air from this last cold snap. Coldest temp I've seen being sent directly into the flue was -5° the morning it was -37°.
Cleaning the HX was a piece of cake, seeing it's just all white/tan flyash. I just take a Scotch Brite scour pad and simply pass over all the metal areas and the flyash just falls right off exposing nice clean bare metal. I access the HX from both the front cleanout cover as well as through the rear flue collar. There is always ZERO creosote in the HX area, so it makes it real easy to get everything cleaned up real nice.
The stove pipe even looked great. I know very early on, when I was doing cold starts every day, sometimes twice a day, I did see some signs of stage 1 creosote right at the BD tee when I peaked past the BD. All I saw yesterday when I removed my stove pipe, was flyash. There was some loose stuff in the stove pipe which I was able to vaccum up. Here's a photo of the stove pipe right at the BD tee after I simply ran a vacuum over it. You can see where I stopped vacuuming up near the 45° elbow at the top of the photo. It's all just simply flyash.
Your clingers probably stayed clinging because of the flatter slope on your stove pipe. My buildup on the pipe looked less, but I had some accumulated at my 45° bend at the collar. They probably couldn't hang on anymore at 45°. All I did was vacuum it and it cleaned right up.This is before cleaning (obviously) not sure why, but the picture makes the buildup look way worse than it was. (thicker/heavier) I have the same direct connect OAK setup that JR does, and pretty much the same results...
Same here, my plenum temps went back up and my flue temps went back down. Crazy how much a thin layer of flyash can insulate the metal in the HX.I just fired back up now and it appears that the flue temps are down about 50* from where they had been running on the top end of the range, when the firebox is still building to normal operating temps. I'm expecting to see the 2* that I've lost off my peak plenum temps to return too.
Yeah, could be...that, and I run my draft at the low end, -0.04"Your clingers probably stayed clinging because of the flatter slope on your stove pipe. My buildup on the pipe looked less, but I had some accumulated at my 45° bend at the collar. They probably couldn't hang on anymore at 45°. All I did was vacuum it and it cleaned right up.
YES. especially with hickory.. The densest woods have a longer burn time but don't burn as hot. Like pine is the exact opposite.well, this sucks.
Soon as I did the night load of mostly BL the house started to lose temp. At 6:45am, with outside temps -27°, the LP furnace kicked in. I really thought I had things rollin', and I did, until that BL load took me down.
I have done a total of 4 BL loads now and all four have resulted in lower than normal plenum temps. The first two were those which I stuffed the firebox full when leaving and setting the Kuuma on low and had those 20 hour burn times. Thought it was weird I was getting such low plenum temps throughout the whole burn. Then the night before last the same thing. It wasn't as cold as last night outside (-16° ) but the house started out at 76° and fell to 72° by morning. The oak loads during the day was able to bring the house temp back up. Then last night I had it maintaining 72°/73° with it being -26° outside and as soon as I loaded the BL for the night load the house temp started to trend down, 0.1° at a time, until it hit 68° and the LP thermostat called for heat.....6 3/4 hours after the night load. I have a digital temp gauge which display's house temps in 0.1° increments, very handy for being able to monitor temp trends.
Plenum temps on oak, when things are rollin and when I was able to maintain house temp, have been right around the 122°-124° area throughout the burn. Plenum temps with black locust (the last two over night loads) have only been 120-122° throughout the burn. Seeing the blower is speed controlled, this also means less volume of air as well.
I also found numerous threads online about other seeing similar results when not mixing it with other hardwoods.
Have any of you had similar results burning just BL?
Wow. Thats pretty awesome. I tried to heat full-time with my insert in my 2100sqft colonial and i went through 3 cords already this year, likely going to need another.Log cabin style with 23.5' tall 12/12 pitch roof. ~1,300SF main, ~1,300SF basement and an additional ~500SF loft. Have ~32,000CF of air space though due to the tall ceilings and no attic space. So equivalent airspace to heating a rectangle building with a 32'x42' footprint with almost 24' tall walls........or a 2 story home w/ 8' walls totaling ~4,000SF including the basement.
The basement is heated just from radiant heat off the Kuuma. The furnace area (~1/4 of the basement) stays roughly the same temp as the rest of the house. The other part of the basement, which is walled off and only has an open doorway joining the two areas, stays 4-5° cooler or so.
I burn, on average, 16,000 lbs of wood in a heating season. Convert that to whatever species suits your fancy.
Wow. Thats pretty awesome. I tried to heat full-time with my insert in my 2100sqft colonial and i went through 3 cords already this year, likely going to need another.
I don't even heat my basement, but my set up would have been pretty optimal for a Kuuma. I have ducts from my heat pump running through the basement and supplying the first floor. I imagine it would have heated my second floor pretty well too.
Its like that Cher song... 'If I could turn back time'...
This is the very time time I've cleaned it during a heating season. The previous 4 years I just cleaned it once in fall before I fired it up for the year.How often are you guys cleaning the HX on your Kuumas?