The T-D2 series is Takagi's newer-generation condensing tankless line — replacement for the older T-M series. Updated modulation logic and slightly higher 0.95 UEF efficiency.
T-D2 lineup
- T-D2-IN-NG — 199k BTU, 10.0 GPM, indoor NG flagship
- T-D2-OS-NG — outdoor variant for warm climates
- T-D2-IN-LP — propane indoor
T-D2 vs T-H3
| T-D2-IN-NG | T-H3-DV-N | |
|---|---|---|
| BTU / GPM | 199k / 10.0 | 199k / 10.0 |
| UEF | 0.95 | 0.94 |
| Heat exchanger warranty | 15 years | 15 years |
| Controller | Newer-gen logic | Older-gen |
| Typical price | $1,599-1,899 | $1,449-1,749 |
T-D2 is slightly more efficient and has newer modulation. T-H3 is slightly cheaper. For most new installs, either is fine — T-D2 if available at competitive price.
Bottom line
Newer-generation condensing. Worth choosing over T-H3 if pricing is similar.