Bosch Greenstar 100 Outdoor Combi Boiler
Model Greenstar 100-OD
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Price as of May 2026
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Btu
96000
Venting
Outdoor — no venting
Fuel Type
Natural Gas
Tank Type
Combi Boiler
Capacity Gpm
3.7
Dhw Capacity
96 kBTU
Bosch Greenstar 100 Outdoor Combi Boiler Review
The Bosch Greenstar 100 Outdoor Combi Boiler is Bosch's outdoor combi configuration. Combines space heating and DHW in a single exterior-mounted appliance.
Specs: 100,000 BTU input, AFUE 95% (condensing), 3.0 GPM DHW at a 70°F rise, stainless steel heat exchanger. Sealed exterior direct-vent. 15-year warranty on heat exchanger.
The outdoor combi positioning is unusual — most combis are indoor-only. Right answer for warm-climate homes wanting combi space-heat + DHW with exterior wall mount.
About $7,000-$10,000 installed depending on hydronic system modifications. Right buyer: warm-climate primary residence with hydronic space heat + DHW demand and suitable exterior wall mount location.
Full Specifications
Brand
Bosch
Model Number
Greenstar 100-OD
Btu
96000
Venting
Outdoor — no venting
Fuel Type
Natural Gas
Tank Type
Combi Boiler
Capacity Gpm
3.7
Dhw Capacity
96 kBTU
Energy Factor
0.95
Warranty Years
10
Heating Capacity
85 kBTU
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