What causes sooting on the exterior of house????

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Quadrafire 52

New Member
Sep 5, 2021
13
Massachusetts
What causes sooting on exterior of house ? And how can you to avoid it? I have seen homes with this problem and have had friends who have also had this problem with pellet stoves being direct vented through wall. I’m currently working on a basement install where I will be going up and out (and possibly going up once I’m outside to avoid the sooting).
 

Tonyray

Minister of Fire
What causes sooting on exterior of house ? And how can you to avoid it? I have seen homes with this problem and have had friends who have also had this problem with pellet stoves being direct vented through wall. I’m currently working on a basement install where I will be going up and out (and possibly going up once I’m outside to avoid the sooting).
This will fix the problem.never get soot. Out/up/out.



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zrock

Minister of Fire
Dec 2, 2017
1,120
bc
Vent to close to house, or bad pellets... When i first started burning the pellets i used burned dirty and at the end of the year i could see the soot on the outside of the house. The next year i switched to a different brand that burned much cleaner and nothing on the side of the house
 

Tonyray

Minister of Fire
yes,, agree with zrock that crappy pellets can contribute to soot also.
although i assumed that most understand that crappy pellets can cause multitude of issues right from the start...
maybe not...
 

bogieb

Minister of Fire
Oct 31, 2014
2,964
South Central NH
I've never had issues with soot, and I don't burn the best pellets. Both of my installs go straight out and terminate on the horizontal. The P61 has about a 6' rise inside, but the P43 is basically a direct vent.

Both terminations are at least 1.5' from the exterior wall - I think the P43 is actually 2' but I could be wrong (and I'm not going out in the dark to measure it right now). The installation compaly installed a "jet" termination on the P61a. I installed a 45* as a termination on the P43. Both face into the prevailing wind.
 

Quadrafire 52

New Member
Sep 5, 2021
13
Massachusetts
I've never had issues with soot, and I don't burn the best pellets. Both of my installs go straight out and terminate on the horizontal. The P61 has about a 6' rise inside, but the P43 is basically a direct vent.

Both terminations are at least 1.5' from the exterior wall - I think the P43 is actually 2' but I could be wrong (and I'm not going out in the dark to measure it right now). The installation compaly installed a "jet" termination on the P61a. I installed a 45* as a termination on the P43. Both face into the prevailing wind.
That’s interesting I figured direct venting into the prevailing wind any smoke would be blown against the house
 

EbS-P

Minister of Fire
Jan 19, 2019
1,252
SE North Carolina
Make sure your feed rate is adjusted properly at your most frequently used burn setting. Make sure you regularly clean the blowers.
 

mtnbiker727

Burning Hunk
Mar 11, 2019
142
PA
My vent terminates about a foot off the ground. The only time I get anything in the flowerbed is when I'm cleaning the stove or the stove pipe.

Soot comes from incomplete combustion, so it's either poor fuel, too much fuel, or not enough air (or a combination).
 

bogieb

Minister of Fire
Oct 31, 2014
2,964
South Central NH
That’s interesting I figured direct venting into the prevailing wind any smoke would be blown against the house

And the siding is a light yellow, so it would be very visible.
 

SidecarFlip

Minister of Fire
Corn burns cleaner (hotter too).
 

Ocelot

Member
Dec 27, 2010
47
Hudson Valley, NY
I've had soot and also a weird yellowish stain on my white vinyl siding from my pellet vent. I don't have it every year and haven't had it in a while, so I think it was related to certain cheap Home Depot pellets. Since I started using better soft wood, it hasn't been a problem anymore. One summer I tried to clean a couple years worth and it was a bear to remove. I tried every cleaner I had, magic erasers, power washer, etc and nothing would remove the yellowish stains. Finally out of desperation (and I recommend extreme caution if at all) I tried some muriatic acid I had and it instantly dissolved and removed the stains. Didn't hurt the vinyl siding at all and it looked like brand new.
 

Tonyray

Minister of Fire
I've had soot and also a weird yellowish stain on my white vinyl siding from my pellet vent. I don't have it every year and haven't had it in a while, so I think it was related to certain cheap Home Depot pellets. Since I started using better soft wood, it hasn't been a problem anymore. One summer I tried to clean a couple years worth and it was a bear to remove. I tried every cleaner I had, magic erasers, power washer, etc and nothing would remove the yellowish stains. Finally out of desperation (and I recommend extreme caution if at all) I tried some muriatic acid I had and it instantly dissolved and removed the stains. Didn't hurt the vinyl siding at all and it looked like bran

I've had soot and also a weird yellowish stain on my white vinyl siding from my pellet vent. I don't have it every year and haven't had it in a while, so I think it was related to certain cheap Home Depot pellets. Since I started using better soft wood, it hasn't been a problem anymore. One summer I tried to clean a couple years worth and it was a bear to remove. I tried every cleaner I had, magic erasers, power washer, etc and nothing would remove the yellowish stains. Finally out of desperation (and I recommend extreme caution if at all) I tried some muriatic acid I had and it instantly dissolved and removed the stains. Didn't hurt the vinyl siding at all and it looked like brand new.
haven't bought box store stuff since my newbie burning days.. can't sell great hardwoods at their pricepoint most times. Middle rd stuff at best.
used to come down in the morning [burn 24/7] and the flame would be almost smothered.
looked like a candle in middle of a birthday cake. it's when I switched to good softwoods and haven't looked back in 8 yrs..
I pay a bit more but lot less ash and much much much cleaner stove... I get 8800 - 9000 btu depending which softies i use.
box store stuff is usually 8-8300 BTU.. SOOT? what's that..........not here.
 

SidecarFlip

Minister of Fire
In my view, soot is the byproduct of incomplete combustion. If the air-fuel ratio is correct and the exhaust tract is clean, there should be minimal soot.
 

SidecarFlip

Minister of Fire
Not much hurts vinyl siding that I know of but the sun will eventually fade it.
 

Washed-Up

Minister of Fire
Nov 5, 2011
675
Kananaskis,Alberta, Canada
Vinegar and water will remove it fairly easy