Just installed a Blaze-King, have ice forming in my chimney??

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Guyfromthenorth

New Member
Jan 3, 2010
3
Northern Ontario
I'll try and give as much info as I can about this issue. I just installed a blaze king about 3 days ago. When I installed it the temps were fairly warm for the seasonal, around -5 to -10. The very next day after I installed it the temps plumeted to around -30ish, windchills of -40 or more (centigrade). Also as this drop happened I had 4 people show up for new years eve so there were THAT many more people, that many more showers, etc in my house. My windows, all argon sealed and less than 10yrs old started forming water drops and ice along the bottom edges (which has begun to dissipate since the people left). I'm not sure if these factors are related but I thought I'd chime them in just in case.

As for the stove, it's a "king" size, catalytic. I burn dead jackpine that I cut and split and stacked in a covered woodshed beside my garage (full roof, not tarped), I also burn white birch, the birch was cut down 2yrs ago in full tree lengths, and I bucked and split it back in July of this passed summer. I was running the blaze king within is specified parameters, the catalytic was showing nice and hot, thermostat where it should have been to heat my house, etc. Of course with the cat style stove the chimney runs much cooler. My chimney is standard selkirk insulated pipe that goes straight up 2 stories through my roof, the stove hooks up to it with 7" black pipe, single walled, and the only bends in it before it connects to the ceiling are 2 45deg elbows to move the pipe "back" then "up" to the ceiling.

After the first day or 2 of -30's I noticed there was ice and some icicles on my rain cap, I've never seen this before, but assumed that the stove was sucking in humid air from inside my house, as well as the usual amounts coming from even dried wood, and due to the low chimney temps it was flash freezing at the rain cap when it hit the shocking cold temps. So I ignored it. Here I am a day or so later and when I turned my kings thermostat up to re-stoke it I heard a HISS.......HISS.......HISS sound coming from my black pipe and could see some water almost forming along one of the elbow joints, so I knew it was dripping down from the top of the chimney ice.

Right now I have the bypass to my cat open and the thermostat turned up to achive the "normal burn" range on my chimney thermometer. The hissing has stopped as well.



Is this normal? Is this a HORRIBLY bad thing to have happen? Could it have just been related to the extra people and moisture in the house combined with the very frigid outdoor temps? Any info would be great.
 
Ja, normal given the circumstances. Condensation is never good except in your dehumidifier and in your still. You might consider installing an OAK to use dry outside air.
 
Good to know, I may consider installing one next season maybe. I left the bypass open and the thermo to max, the stove is nice and hot and the chimney stayed in the clean burn range, no more hissing and other than some ice left on the bottom of the selkirk exposed on the roof the icicles appear to be gone, I'm thinking the stuff inside the liner must be gone too. If this keeps happening should I be worried about anything? Also if anyone else has any info it'd be great. Thanks
 
Never happened to me but I alway do a nice 10 minute open by-pass burn on a fresh load. Its not smoke coming out the pipe its a lot of moisture with the BK. They warn about it in the manual. How are things going for ya after the by-pass burn off?
 
Sorry, but the first thing I suspect is that your wood is not dry enough. Any moisture than makes it up to the chimney cap has passed through the stove and probably came out the firewood. Most woods do not dry in log form with bark still attached and birch bark was used as flashing for its waterproof properties by alaskan pioneers and prior to them, native americans. I can't speak for the pine, since I have never cut and stacked any wet.

How long is the class A ? There is a lot of heat loss in black pipe, which may mean that you may be better off with double wall.

Try burning some kiln dried dimensional lumber the next time you hit similar temps. If you have no problem with that, you know it is the quality of the wood. An 8' 2x4 stick is pretty cheap and you won't need to many for a trial. Easy to cut to length too.

Guyfromthenorth said:
I burn dead jackpine that I cut and split and stacked in a covered woodshed beside my garage (full roof, not tarped), I also burn white birch, the birch was cut down 2yrs ago in full tree lengths, and I bucked and split it back in July of this passed summer.

HISS.......HISS.......HISS sound coming from my black pipe and could see some water almost forming along one of the elbow joints, so I knew it was dripping down from the top of the chimney ice.
 
Yup, It is normal as stated above... Keep an eye on the cap, when you see the ice forming just open the bypass for a little while to melt it away. If the ice really builds up it could block the flue/cap causing CO to back up into the house. If I were having that problem, I would check the cap before going to bed every night just to be safe.

A CO detector near the stove isn't a bad idea either.
 
This is one of the reasons I don't run a top in the winter. The BK cats run a cool flue temp, and water is a byproduct of combustion. So in cold temps water is going to condense and freeze on the cold stuff (chimney cap, uninsulated pipe). Burn it hot once in a while, or go topless!

I have about 10 feet of insulated class A sticking out my roof, and on cold days (-30) on reloads I sometimes hear the "hiss hiss" of water dripping inside the pipe and hitting the stove internally.
 
run it on 3 for a while after shutting the bypass. should do ya good.
 
It might be interesting to see what your wood does on a moisture meter, but the first thing I would do is get some double wall connector installed. It doesn't sound like you have too much single wall exposed, but it might make the difference.

Do you have a thermometer on the connector pipe? (probe or surface?)
 
Another winter with the BK and still loving this stove. Less ice this year, I've done a few things to compensate. My wood is dry and good to go, I had one batch of maple I found and when I burned one peice I saw water hissing out of it so I moved all that stuff aside to cure next season split, the white birch and jackpine I'm burning now are 100% dry. I need to get around to buying and outdoor air kit as I'm almost sure most of that moisture was being pulled in from my house itself. The bathroom is about 15feet from the blaze king itself where showers happen every day, we run the exhaust fan in the bathroom for 30mins+ every day but even with it running I think it's not venting the moisture right as it's fighting with the BK to draw air INTO the house for combustion. What I started doing was opening the window that's around 10 feet from the BK open just a crack (maybe 1" open, window itself is only maybe 14" high) which allows the BK to draw air from the opposite side of the house and also lets the bathroom fan draw accross from the window, passed the king, and out the exhaust vent. All in all I think I have a nice directional flow of air through my house that does not involve the BK breathing air from the bathroom area. So far no ice, and even with the window open only a crack the house is never cold as the BK just keeps chugging along. Outdoor air kit will be coming one day as I have a feeling it'll solve all my problems.
 
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