Technical Service Bulletin:
Vent and Combustion Air Pipe Position
Models: Bosch Greenstar Combi, Bosch Greenstar
Introduction
Please read this entire document prior to proceeding with
any installation or maintenance of a Bosch Greenstar
boiler.
This bulletin is a supplement to the Bosch Greenstar Installation
and Service Instruction and Applications Manuals, and its
requirements must be met for full warranty coverage.
Follow these guidelines to ensure a long service life and trouble
free operation of the appliance.
Clearance in accordance with local installation codes
and the requirements of the gas supplier including the
authority having jurisdiction.
Any questions, please contact the Bosch Technical Service
Department at 1-800-283-3787.
Figure 1
3
X1
3
X3
X3
X2
X1
YB
X2
X3
X5
X1
X4
3
YA
3
YA
1
2
6 720 641 933-17.1O
Direct vent (sealed combustion):
[1]
Forced Air Inlet
[2]
Gravity Air Inlet
[3]
Exhaust terminal
X1
1 foot (305 mm)
X2
3 feet (915 mm)
X3
1 foot (305 mm) USA
3 feet (915mm) Canada
X4
1 foot (305 mm) 1)
X5
7 feet (2135 mm) 2)
YA
At least 1 foot (305 mm) above grade or snow line
YB
Exhaust terminal must be at least:
3 feet (915 mm) above forced air inlet within
10 feet (3050 mm) horizontally - USA
6 feet (915 mm) above forced air inlet - Canada
Fan assisted appliance (non-sealed combustion):
[1]
Forced Air Inlet
[2]
Gravity Air Inlet
[3]
Exhaust terminal
X1
1 foot (305 mm)
X2
3 feet (915 mm)
X3
1 foot (305 mm) USA
3 feet (915mm) Canada
X4
1 foot (305 mm) 1)
X5
7 feet (2135 mm) 2)
YA
At least 1 foot (305 mm) above grade or snow line
YB
Exhaust terminal must be at least:
3 feet (915 mm) above forced air inlet within
10 feet (3050 mm) horizontally - USA
6 feet (915 mm) above forced air inlet - Canada
1) For Clearances not specified in ANSI Z223.1 / NFPA 54 or CSA B149.1
2) A vent shall not terminate directly above a sidewalk or paved driveway that is located
between 2 single family dwellings and serves both dwellings.
Data subject to change without notice
BTC 436002116 A | 10.2014
Bosch Thermotechnology Corp. 50 Wentworth Avenue Londonderry, NH 03053
Tel: 1-866-642-3198 Fax: 1-603-965-7581 www.bosch-climate.us