Bosch Greenstar Brochure

Technical Specifications
Model
Heating and Tankless Hot Water Heating*
GREENSTAR
COMBI 100
GREENSTAR
COMBI 131
GREENSTAR
COMBI 151
GREENSTAR
57
GREENSTAR
79
GREENSTAR
100
GREENSTAR
131
GREENSTAR
151
Wall Model ZWB28-3 ZWB35-3 ZWB42-3 ZBR16-3 ZBR21-3 ZBR28-3 ZBR35-3 ZBR42-3
Performance Specifications
Fuel NG / LP NG / LP
Input Maximum (MBH) 100.0 131.9 151.6 57.2 79.2 100.0 131.9 151.6
Input Minimum (MBH) 24.6 36.0 36.0 12.9 24.6 24.6 36.0 36.0
DOE Heating Capacity (MBH) 91 118 135 52 71 91 118 135
Net I=B=R (MBH) 79 103 117 45 62 79 103 117
AFUE 95%
DHW Flow Max (ΔT at 72°F), GPM 2.65 3.2 4.0 not applicable
Water Volume, Gal (L) 0.952 (3.5) 0.952 (3.5)
Technical Data
Dimensions, in. (W x H x D) 17
2
/
5
x 33½ x 13
9
/
10
17
2
/
5
x 33½ x 13
9
/
10
Weight, lbs (without Packaging, kg) 110.2 (50) 103.6 (47)
Optional Base Dimensions Stand dimensions: 13¾" deep, by 17³⁄
8
" wide by 20
5
⁄
8
" high. Total height of stand and boiler: 54
1
⁄
8
"
Wall Boiler Supply & Return Tappings in. 1
Domestic Cold Water Supply, in. ¾ not applicable
Domestic Hot Water Supply, in. ¾ not applicable
Gas Connection Size, in. ¾
Vent Size, in. 2 - 3
Vent Material PVC / CPVC / PP / PP-Flex / SS
Combustion Air Size, in. 2 - 3
High Altitude Capability
No De-Rating
up to 6,000'
No De-Rating
up to 6,000'
De-Rating
3% per 1,000'
No De-Rating
up to 6,000'
No De-Rating
up to 6,000'
No De-Rating
up to 6,000'
No De-Rating
up to 6,000'
De-Rating
3% per 1,000'
Permissible Inlet Gas Pressure
NG in. W.C.
LP (propane) in. W.C.
3.5-10.5"
8-13"
* Heat only Greenstar models may be used with indirect water tanks to provide domestic hot water
Bosch Greenstar Accessories
Concentric Vent Kit
A concentric vent is designed to use only one pipe for both the intake for combustion air and the
exhaust vent. This design is an alternative to the standard two pipe intake/vent. Unlike standard
venting, which requires cutting two holes through the home, one for intake and one for exhaust,
a concentric vent only requires one hole through the wall to the outside.
Domestic Hot Water Tanks
Combine your Bosch boiler with one of our indirect hot water tanks. A Bosch tank is extremely
well insulated for minimal stand-by heat loss. Available in 32 up to 119 gallons, these tanks
have a higher recovery rate than direct fired or tankless coil versions.
Panel Radiators
Radiant heat, like the sun, warms objects rather than just the air, creating a greater sense of
warmth and at lower room temperatures. Panel radiators provide the perfect combination of
both radiant and convection heat. Depending on system and designed supply temperatures,
panel radiators can offer additional energy savings.