CleaverBrooks CFC - Page 60

Chapter 3 — Stack and Intake Vent Sizing and Installation
3-12 Part No. 750-263
F. STACK SIZING
1. Stack design using room air for combustion
6" Standard 6" 80
4" Option 4" 40
CFC 750 6" Standard 6" 80
8" Standard 8" 140
6" Option 6" 80
10" Option 10" 220
10" Standard 10" 140
8" Option 8" 90
12" Option 12" 250
12" Standard 12" 60
10" Option 10" 40
CFC 2500 12" Standard 12" 110
* Each additional 90 elbow equals 5 equivalent feet of ductwork. Subtract from the
maximum or minimum length accordingly.
Maximum allowable pressure drop in flue vent ducting is 0.25" w.c.
Boiler Stack
Connection
Stack/Vent
Size
Maximum length of breeching or
stack [feet]*
Boiler Size
CFC 500
CFC 1000
CFC 1500
CFC 1800