newbie question on flame height

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
Status
Not open for further replies.

doublewide

Member
Jun 14, 2010
119
Eastern PA
I'm planning on burning on setting #3 (out of 5). I am getting really good heat, but my flame is barely visible through the bay window of the stove. It is mostly down in the burn pot and coming up 6-8 inches. I want to burn efficiently, so would setting the flame higher by adding more air or by increasing the pellet feed rate really lower the efficiency of the stove? Also a lot of the pics of stoves I see are burning with a 18" to 22" flame. How close should the flame be to the heat exchange tubes, without burning too hot or too inefficiently?
 

DAKSY

Full Time RVer
Staff member
Dec 2, 2008
9,546
Wherever we're parked
You're kidding, right? I've NEVER seen a pellet stove with an 18" flame.
In fact, I don't think I've never seen a pellet stove with 18" of clearance
between the burnpot & the Heat Exchanger tubes. Pellet furnace - maybe...
My P43 cranks with 6-8" flame height...If it had 18" of flame height would be
4" higher than the top of the stove....
 

Delta-T

Minister of Fire
Feb 27, 2008
3,143
NH
I can only think of 2 stoves that would even be able to have 18" of fire, the Lennox Bella, and the Enviro Maxx, so I wouldn't use pics of other units to judge the operation of your unit.

and maybe the Europa, that might have enough room for 18" of fire.
 
to get a higher flame you need to add more fuel. If you add more air, it will burn cleaner up to a point, and then you start to put out the flame. I would just burn it, see how much soot, clinkers, and heat I get, and then not worry about it.

Pellet burning is an art, not a science. This isn't jetted liquid fuel you are burning, so don't worry about it too much unless you have problems with a dirty stove, too much ass, or clinkers.
 
Panhandler said:
," too much ass". Wow, haven't had that problem in about 25 years!

Truth be told, I have never had that problem. No matter how much I would try to brag as an 18 year old!
 

doublewide

Member
Jun 14, 2010
119
Eastern PA
DAKSY said:
You're kidding, right? I've NEVER seen a pellet stove with an 18" flame.
In fact, I don't think I've never seen a pellet stove with 18" of clearance
between the burnpot & the Heat Exchanger tubes. Pellet furnace - maybe...
My P43 cranks with 6-8" flame height...If it had 18" of flame height would be
4" higher than the top of the stove....

Okay I was not looking at my stove, but now I am from the burn pot to the top is about 12-14 inches. I'm just trying to figure out at what level to set the feed rate, air, and heat setting. My flame is about 6-8 inches, so I guess all is good. I saw another post, and the guys pic had the flame all the way up to the heat exchangers. I will try to find the post so you can see the pic. Thanks for the help and the stories about how you used to get some "ass."

Check out this flame that is why I asked.


https://www.hearth.com/econtent/index.php/forums/viewthread/58976/
 

SmokeyTheBear

Minister of Fire
Nov 10, 2008
13,363
Standish, ME
On my stove there is about eleven inches between the burn pot and the heat exchanger.

Are you certain you aren't being confused by the pictures lack of visual guides as to distances and angles.

While I can get a very high flame it only happens when I burn it wide open and even then it doesn't hit the exchanger.
 
I

imacman

Guest
This is what my Englander 10-cpm looks like when it's burning, and also a shot of what my previous stove, an Avalon Astoria looked like burning:
 

Attachments

  • 10-CPM Burn2.jpg
    10-CPM Burn2.jpg
    23.7 KB · Views: 3,213
  • Astoria burning2.jpg
    Astoria burning2.jpg
    12.7 KB · Views: 2,076

krooser

Minister of Fire
Jan 2, 2008
2,423
Waupaca, WI
www.rumblefest.net
The flame on my wind turbine was about 150'.....
turbineonfire.jpg


Sure glad I bought that... the air quality around my home has really improved....
 

vvvv

New Member
Feb 23, 2010
1,449
MAINE
the hottest part of the flame is at its tip & if there wasnt a stove enclosure involved u might lose heat. as is u can lose heat either into the room or to the outdoors via exhaust which will result from excess combustion air flowing thru the stove to burn the pellets & TO KEEP THE GLASS CLEAN! sootier glass results in better room heating ithinx.
actual contact of the flames to the metal will result in wearing out the metal faster
 

Winslow2010

New Member
Dec 19, 2010
41
West Virginia
I seem to have flame dysfunction. My Lennox Winslow PI-40 has low flames. For the most part, the flames are either in the burn pot or 3-4 inches and that is on a setting of 3 (out of 4). I tried to adjust the airflow but that did almost nothing. I am starting to suspect a low pellet feed. I have been burning 1.5 bags per day even on the 3/4 setting which seems low based on the manual feed rate of 1.8 pounds to 3.8 pounds per hour.

Setting 1 1.80#/hr Bag every 22 hours
Setting 2 2.47#/hr Bag every 16 hours
Setting 3 3.14#/hr Bag every 12 hours
Setting 4 3.80#/hr Bag every 10 hours

I have been running on setting 3 for days and using maybe 1.5 bags per day. I don't want to use more pellets but something does not seem right with these numbers.

Any thoughts?
 

SmokeyTheBear

Minister of Fire
Nov 10, 2008
13,363
Standish, ME
Winslow2010 said:
I seem to have flame dysfunction. My Lennox Winslow PI-40 has low flames. For the most part, the flames are either in the burn pot or 3-4 inches and that is on a setting of 3 (out of 4). I tried to adjust the airflow but that did almost nothing. I am starting to suspect a low pellet feed. I have been burning 1.5 bags per day even on the 3/4 setting which seems low based on the manual feed rate of 1.8 pounds to 3.8 pounds per hour.

Setting 1 1.80#/hr Bag every 22 hours
Setting 2 2.47#/hr Bag every 16 hours
Setting 3 3.14#/hr Bag every 12 hours
Setting 4 3.80#/hr Bag every 10 hours

I have been running on setting 3 for days and using maybe 1.5 bags per day. I don't want to use more pellets but something does not seem right with these numbers.

Any thoughts?


Please see: https://www.hearth.com/econtent/index.php/forums/viewreply/761594/ .
 

Winslow2010

New Member
Dec 19, 2010
41
West Virginia
After the difficult task of sitting in front of the stove while the snow comes down outside :) , I think my issue is inconsistent pellet delivery. I have been using the Pennington Oak pellets that are dated 2008 and do not have the PFI grade. A decent number of them are longer than the 1.5" max length requirement. I am going to switch over to the Hammer Hot Ones and see if I get a different result. My flame height does goes to 6-8 inches when the pellets consistently drop. During the slow drop periods, the flame recedes into the burn pot.
 

EZsteve

Member
Dec 26, 2010
132
Central Va
Winslow2010 said:
After the difficult task of sitting in front of the stove while the snow comes down outside :) , I think my issue is inconsistent pellet delivery. I have been using the Pennington Oak pellets that are dated 2008 and do not have the PFI grade. A decent number of them are longer than the 1.5" max length requirement. I am going to switch over to the Hammer Hot Ones and see if I get a different result. My flame height does goes to 6-8 inches when the pellets consistently drop. During the slow drop periods, the flame recedes into the burn pot.

yeah the pellet quality i think has alot to do with your problem. i have the same stove and i had good even heat and flame with premium pellets. then i bought what said it was premium pellets and they do the same thing you are describing. unfortunately i have a ton of them. i learned a valuable lesson and always test before you buy.
 
Status
Not open for further replies.