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Furnace stack temp

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aboucher
aboucher Member Posts: 1
in Oil Heating

Stack temp of hot air furnaces- what are you guys considering acceptable stack temps? I recently replaced the furnace at my house and I’m averaging a 550 stack temp, which seems high but I usually only work on boilers so I don’t really know.

Airco/ECR BCL-100
Beckett AFG- burner sold with furnace
.60 70w at 140 psi
0 smoke
6% o2
-.02” draft at breech
5 in flue 5 foot run 2 90s into clay lined chimney
70 degree return
125-135 discharge
Return plenum is 20x18x20 open at the top
Unit serves 1100 sq basement

Comments

  • Ironman
    Ironman Member Posts: 7,824

    How much excess air?

    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    HydronicMike
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 19,279

    Is that 550 gross or net? If the space is 65 and the 550 is gross your net is 485 which isn't to bad. Other than that I would consider 550 a little high.

    What fan speed are you running? 125-135 is a bit high on the discharge. Your temp rise is 65 maybe check the manual and speed up the fan.

    Big Ed_4HVACNUT

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