Single Pipe System-Vertical/Horizontal Installations; Maximum Allowable Equivalent Length - Stainless Steel / Pp; Multiple Boiler Installations; Horizontal Vent Termination - Viessmann Vitocrossal 200 Installation Instructions Manual

Vitocrossal 200 CM2 186 to 311 Installation
Single Pipe System - Vertical / Horizontal Installations

Maximum allowable equivalent length - Stainless steel / PP

Boiler Models CM2-186, -246, -311
Flue gas in. (mm)
combustion air in. (mm)
Max. equivalent length
a+b [ft. (m)]
Note: If flexible vent or air-intake pipe are used, the total max. equivalent length will be reduced by 25% [149 ft. (45 m)].

Multiple Boiler Installations

Horizontal vent termination

Vertical vent termination

8 (200)
8 (200)
198 (60)
Note: 36 in. (915 mm) minimum distance apart for
6 in. min. (150 mm min.)
Venting Options - Stainless Steel / PP
10 (250)
10 (250)
Contact Viessmann for vent length calculation
36 in. min.
(915 mm min.)
vent terminations.
4 in. min.
(100 mm min.)
12 (305)
12 (305)
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