Bosch Greentherm (T9800 SEO 160) vs Takagi T-H3-OS-N 1 (T-H3-OS-P 1-1)
Both water heaters carry the same efficiency rating: UEF 0.95. At national average rates that works out to about $258/year for the Bosch Greentherm (T9800 SEO 160) against $525/year for the Takagi T-H3-OS-N 1 (T-H3-OS-P 1-1) — a $267 annual difference. The Takagi T-H3-OS-N 1 (T-H3-OS-P 1-1) sustains the higher flow (5.8 GPM vs 4.6 GPM under the DOE test).
| Bosch Greentherm (T9800 SEO 160) | Takagi T-H3-OS-N 1 (T-H3-OS-P 1-1) | |
|---|---|---|
| Uniform Energy Factor (UEF) | 0.95 | 0.95 |
| Fuel | Natural Gas, Propane | Propane |
| Max flow rate | 4.6 GPM | 5.8 GPM |
| Draw pattern | High | High |
| Annual gas use (natural gas) | 178 therms/yr | 178 therms/yr |
| Gas input rate | 160 kBTU/h | 199 kBTU/h |
| Max current draw | 2.7 A | 5 A |
| Vent type | Direct Vent | Power Vent |
| Smart / connected capable | No | No |
| Minimum activation flow | 0.5 GPM | 1 GPM |
| Annual propane use | 194.53 gal/yr | 194.53 gal/yr |
| Vent size | 2 | 3 |
| Height | 32 in | 22 in |
| Width | 19 in | 18 in |
| Depth | 10 in | 11 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the Bosch Greentherm (T9800 SEO 160) or the Takagi T-H3-OS-N 1 (T-H3-OS-P 1-1)?
The Bosch Greentherm (T9800 SEO 160): about $258/year versus $525/year for the Takagi T-H3-OS-N 1 (T-H3-OS-P 1-1) at national average rates — a $267 annual difference.
Are the Bosch Greentherm (T9800 SEO 160) and Takagi T-H3-OS-N 1 (T-H3-OS-P 1-1) both ENERGY STAR certified?
Yes — every water heater in this database is drawn from the U.S. EPA ENERGY STAR certified water heater datasets.