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5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Venting Options - Stainless Steel/PP(s)
Two Pipe System - Vertical Exhaust/Horizontal Air Intake
Flue
Air
a - Equivalent exhaust length
b - Equivalent air intake length
(see chart for max. air intake length)
Horizontal intake and vertical exhaust
Vitocrossal 300 CA3 Boiler model
3.5
4.0
Combustion air intake diameter
in. (mm)
12 (300)
12 (300)
12 (300)
14 (350)
Exhaust vent diameter
in. (mm)
12 (300)
14 (350)
12 (300)
14 (350)
Max. combustion air intake length (b)
ft. (m)
66 (20)
131 (40)
50 (15)
66 (20)
Max. total equivalent length (a+b)*
ft. (m)
198 (60)
198 (60)
115 (35)
198 (60)
Horizontal intake and vertical exhaust
Vitocrossal 300 CA3 Boiler model
5.0
6.0
Combustion air intake diameter
in. (mm)
16 (400) 16
(400)
Exhaust vent diameter
in. (mm)
16 (400)
16 (400)
Max. combustion air intake length (b)
ft. (m)
198 (60)
164 (50)
Max. total equivalent length (a+b)*
ft. (m)
198 (60)
198 (60)
*
A minimum of 20 ft. (6 m) of equivalent exhaust vent length must be included in the equivalent vent length (a+b) calculation.
Note:
If flexible vent or air-intake pipe are used, the total max. equivalent length will be reduced by 25%.
Horizontal intake and vertical exhaust
Vitocrossal 300 CA3 Boiler model
2.5
3.0
Combustion air intake diameter
in. (mm)
10 (250)
12 (300)
10 (250)
12 (300)
Exhaust vent diameter
in. (mm)
10 (250)
12 (300)
10 (250)
12 (300)
Max. combustion air intake length (b)
ft. (m)
66 (20)
99 (30)
33 (10)
99 (30)
Max. total equivalent length (a+b)*
ft. (m)
99 (30)
198 (60)
52 (15)
198 (60)
