Flare-FF-50 vent calculation example based on the manual:

Vent path from Survey:

  • 3 ft up from the fireplace

  • 45 elbow

  • 1ft

  • 45 elbow up

  • 15 ft vertical up

  • Vertical cap

Y vertical calculation

A – First Flue length =  3              =  3 ft
B – Vertical Flue length = 1 +15  = 16 ft
C – Roof Terminal = 1                   = 1.5 ft
H – Small Elbow (45°) = 2            =  2 ft

 Y Axis Parameters = 22.5 ft

Flare-FF-50 vent cal

X Horizontal calculation

D – Horizontal Flue length  = 1 ft
E – Elbow (90°)                        =  0
F – Elbow (lying 90°)              =  0
G – Wall Terminal                   =0

X Axis Parameters = 1

Flare-FF-50 vent cal