Page 4
HIGH SPEED SIZING CHART
0
50
100
150
200
250
300
0
50
100
150
200
250
300
350
400
450
500
550
GAS INPUT FIRING RATE (1000 BTU/hr.)
MAX
. E
Q
UIV
A
L
E
NT
DUCT
L
E
NGT
H
(ft.)
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
OIL INPUT FIRING RATE (gallons per hour)
(1 gallon oil/hr = 140,000 BTU/hr)
6" Duct & Hood
4" Duct & Hood
4" Duct, Hood, & Orifice
Diagram A
LOW SPEED SIZING CHART
0
50
100
150
200
250
300
0
50
100
150
200
250
300
350
400
GAS INPUT FIRING RATE (1000 BTU/hr.)
MAX
. E
Q
UI
V
A
LE
NT DUCT LE
NG
TH (ft.
)
0.00
0.50
1.00
1.50
2.00
2.50
OIL INPUT FIRING RATE (gallons per hour)
(1 gallon oil/hr = 140,000 BTU/hr.)
6" Duct & Hood
4" Duct & Hood
4" Duct & Hood w/ Orifice
Diagram B
