In loving memory of Kenis D. Keathley 6/4/81 - 3/27/22 Loving father, husband, brother, friend and firewood hoarder Rest in peace, Dexterday

P68 vs P43 Heat Output

Discussion in 'Pellet Stoves, Pellet Fireplaces, Pellet Furnaces' started by Kevin1024, Dec 31, 2016.

  1. Kevin1024

    Kevin1024

    Joined:
    Nov 27, 2016
    Messages:
    55
    Likes Received:
    184
    Location:
    Nj
    i have a magnetic thermometer on my p68 as I did on my p43. Should I be seeing higher temperatures on my 68 versus my bowl 43 because of the higher BTU? I'm seeing no difference
     
    imacman and IHATEPROPANE like this.
  2. IHATEPROPANE

    IHATEPROPANE

    Joined:
    Oct 13, 2013
    Messages:
    4,671
    Likes Received:
    19,077
    I don't think you can compare the two as far as the temps go.
    But, just because it is a higher BTU stove doesn't necessarily mean you are using more btus. Whats pellet consumption look like in comparison?
     
  3. Kevin1024

    Kevin1024

    Joined:
    Nov 27, 2016
    Messages:
    55
    Likes Received:
    184
    Location:
    Nj
    It looks like much more with the 68.
     
    imacman and CleanFire like this.
  4. IHATEPROPANE

    IHATEPROPANE

    Joined:
    Oct 13, 2013
    Messages:
    4,671
    Likes Received:
    19,077
    :faint:
     
    imacman and CleanFire like this.
  5. IHATEPROPANE

    IHATEPROPANE

    Joined:
    Oct 13, 2013
    Messages:
    4,671
    Likes Received:
    19,077
    Is the house the same temps throughout?
     
    imacman and CleanFire like this.
  6. Kevin1024

    Kevin1024

    Joined:
    Nov 27, 2016
    Messages:
    55
    Likes Received:
    184
    Location:
    Nj
    No. It's slightly better. We have a thermostat about 20 ft away that would get to about 68 max with the p43. With the 68 I can get 70 so it is better. But I'm just wondering if the magnetic thermometer should be hotter with the 68 vs 43. I'm also finding a much lazier flame with the 68. It's amazing how scientific this can get. The two setups were identical. I have a few sparks on the tips now but not like the 43. My burnpot fills up pretty quickly too. Clumps.
     
    imacman, CleanFire and IHATEPROPANE like this.
  7. jtakeman

    jtakeman Moderator

    Joined:
    Oct 4, 2013
    Messages:
    12,196
    Likes Received:
    54,975
    Location:
    NW CT foothills
    It might be hard to tell? The P43 might show the same convection temps, But the P68 might radiate more. It might get hotter in other area's like top, front and sides?

    If its eating more pellets? Its likely putting more BTU's out one way of another.
     
  8. IHATEPROPANE

    IHATEPROPANE

    Joined:
    Oct 13, 2013
    Messages:
    4,671
    Likes Received:
    19,077
    It's nice you are able to keep the house warmer, but with it will come higher consumption. Hopefully you get that burn straightened out.
     
    imacman, CleanFire and ttdberg like this.
  9. CleanFire

    CleanFire

    Joined:
    Aug 28, 2015
    Messages:
    2,997
    Likes Received:
    16,525
    Location:
    .
    Using a wood stove mag. thermometer to measure heat output @ the heat exchanger tubes will give a 'general' reading, at best, at least here.

    You really need a thermoprobe placed directly in front of the heat exchange tube measuring (air only) to get a more accurate reading.. Or on a fixed (metal) location on the stove that represents a heat change based on fuel amount..

    slvrblkk and IHATEPROPANE recommended this one, I use it here, works excellent / very accurate to within < 1 degree ..

    Amazon.com: Signstek 3 1/2 6802 II Dual Channel Digital Thermometer 1300°C 2372°F with 2 K-Type Thermocouple Sensor Probe: Industrial & Scientific

    From what you describe, the P68 is working correctly: if your ambient air temp. is higher vs. the P43, it stands to reason the stove will use more fuel to keep the home warmer.

    As far as 'tuning' your stove, I believe the standard practice is to setup feed rate so there is a 1 inch gap between pellets in the pot -> to the edge of the burn pot.. To allow the ESP to optimize fuel rate. * But I don't own your stove, hopefully the Harman folks can help w/ this.
     
  10. Jason845

    Jason845

    Joined:
    Oct 21, 2015
    Messages:
    98
    Likes Received:
    555
    Location:
    Kingston, Ny
    My p43 will blow us right out of the house. A p43 or 68 should be able to get that thermometer up to 80 if you wanted it to get that high. What is the insulation like in your house?
     
  11. Lousyweather

    Lousyweather

    Joined:
    Dec 23, 2013
    Messages:
    2,798
    Likes Received:
    9,040
    Not necessarily.....it depends on the house.....SO many different factors, many not really quantifiable, here......how well does the air move in the house, how much air infiltration is there, how bad is the stack effect in the home, how much insulation, the climate, how warm the individual likes it, are other appliances interfering with air movement, etc........
     
    CleanFire and IHATEPROPANE like this.
  12. DexterDay

    DexterDay Administrator

    Joined:
    Oct 2, 2013
    Messages:
    12,411
    Likes Received:
    31,632
    Location:
    Northeast Oh
    Does the 68 have a bigger convection blower than the P43? If so that may be the case. The same temp with a bigger blower will still put out more heat.


    If you put the same size blower on the P43 the output temps would be lower.
     
  13. Lousyweather

    Lousyweather

    Joined:
    Dec 23, 2013
    Messages:
    2,798
    Likes Received:
    9,040
    The P68 utilizes the same distribution fan as the P43
     
    DexterDay, CleanFire and will711 like this.
  14. DexterDay

    DexterDay Administrator

    Joined:
    Oct 2, 2013
    Messages:
    12,411
    Likes Received:
    31,632
    Location:
    Northeast Oh
    Disregard my above post ;) lol
     
    ttdberg and IHATEPROPANE like this.