Bosch Gas Water Heaters
Bosch filters
Bosch Greentherm 9000 9.9 GPM Tankless Water Heater
Bosch Greentherm 7.2 GPM Natural Gas Tankless Water Heater
Bosch Greentherm T 9999 SE Indoor Tankless Water Heater
Bosch Greentherm 5300 5.3 GPM Tankless Water Heater
Bosch Greenstar 151 Combi Boiler
Bosch Greenstar 131 Combi Boiler
Bosch Greentherm 9000 Outdoor Tankless Water Heater
Bosch Greentherm 9000 9.9 GPM Tankless Water Heater (Propane)
Bosch Greenstar 100 ZWB-28-3 Combi Boiler
Bosch Greentherm 5300 5.3 GPM Tankless Water Heater (Propane)
Bosch Greenstar 100 Outdoor Combi Boiler
Bosch Gas Water Heaters: buyer's guide
Bosch offers 12 gas water heaters models in the lineup we track. This page is the Bosch-specific cut of the broader Gas Water Heaters water heaters category — same product class, narrowed to the Bosch catalog only.
About Bosch
<p>Bosch's water heaters lineup is one of the most-shopped in the category — and there are concrete reasons it stays that way year after year. This page is the complete index of every Bosch water heaters model we currently track, with verified specifications, current Amazon pricing, aggregated ratings, and head-to-head comparison links against the strongest competitors in each price tier. Before you start filtering, the next several minutes will give you the context you need to make a confident pick.</p> <h2 id="brand-overview">About Bosch in water heaters</h2> <p>Bosch's position in the wat...
For the complete Bosch lineup across all sub-types and capacities, see the Bosch Water Heaters hub.
Bosch Gas Water Heaters models we track
- Bosch Greentherm T 9900 SE Indoor Tankless Water Heater (WTG-9900-NG) — Top-tier Bosch condensing tankless with smart-home integration.
- Bosch Greentherm 9000 9.9 GPM Tankless Water Heater (WTG-9000-NG) — Bosch flagship condensing tankless. 9.9 GPM, 0.95 UEF, German engineering.
- Bosch Greentherm 7.2 GPM Natural Gas Tankless Water Heater (WTG-7.2-NG) — 7.2 GPM Bosch condensing tankless for 2–3 person households.
- Bosch Greentherm T 9999 SE Indoor Tankless Water Heater (WTG-9999-NG) — Newest Bosch Greentherm flagship — 11.0 GPM condensing tankless with smart-home Wi-Fi integration. Successor to the WTG-9900. PVC venting, 15-year heat exchange...
- Bosch Greentherm 5300 5.3 GPM Tankless Water Heater (WTG-5300-NG) — Mid-range Bosch tankless. Non-condensing, 5.3 GPM.
- Bosch Greenstar 151 Combi Boiler (Greenstar 151) — Flagship residential Greenstar combi — 151k BTU max input. For 2-3 bath hydronic homes with substantial heating load. German engineering with stainless heat exc...
- Bosch Greenstar 131 Combi Boiler (Greenstar 131) — Mid-tier Greenstar combi — 131k BTU max input. For 2-bath hydronic homes with moderate heating demand. Same chassis approach as the 151 but tuned for lower dema...
- Bosch Greentherm 9000 Outdoor Tankless Water Heater (WTG-9000-OD-NG) — Outdoor variant of the Greentherm 9000. Weather-sealed cabinet for exterior wall-mount in moderate climates. No interior venting required; freeze protection bui...
Other Gas water heaters brands
If you're cross-shopping gas water heaters beyond Bosch, the following brands also ship in this category:
About Gas Water Heaters water heaters
Natural gas water heaters dominate US residential water heating where natural gas service is available — roughly 49% of US homes have gas water heaters. They split into tank (40/50/75/80-gallon storage with gas burner) and tankless (on-demand condensing) sub-types, with venting variations (atmospheric chimney, power-vent PVC, direct-vent sealed combustion) that determine which install scenarios fit.
- Operating cost: natural gas is consistently the cheapest residential water heater fuel by per-BTU pricing in most US markets — typically 50–60% of equivalent electric resistance cost
- Recovery speed: a 40,000 BTU gas burner delivers ~40 GPH at 90°F rise — tw...
For the complete gas buyer's guide (all brands, full comparison framework), see the Gas Water Heaters category hub.
Other Bosch filters
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