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Comparison
Verdict in brief
Takagi T-H3M-DV-N and Takagi T-H3M-DV-P are two tankless water heaters from the Takagi T-H3 Series line. The Takagi T-H3M-DV-N is rated 15,000–120,000 BTU/h input and 0.9 UEF, and the Takagi T-H3M-DV-P is rated 13,000–120,000 BTU/h input and 0.9 UEF. Both list the same published input of 120,000 BTU/h. Both list the same published UEF of 0.9 UEF.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Takagi T-H3M-DV-N | Takagi T-H3M-DV-P |
|---|---|---|
| Input, minimum | 15,000 BTU/h | 13,000 BTU/h |
| Input, maximum | 120,000 BTU/h | 120,000 BTU/h |
| Dimensions (H × W × D) | 22-7/8 × 13-7/8 × 10-13/16 in | 22-7/8 × 13-7/8 × 10-13/16 in |
| Hot/cold water connections | 3/4" NPT | 3/4" NPT |
| Gas connection | 1/2" NPT | 1/2" NPT |
| Uniform Energy Factor (UEF) | 0.9 UEF | 0.9 UEF |
| Maximum flow rate | 6.6 GPM | 6.6 GPM |
| Approx. shipping weight | 54 lb | 54 lb |
| Installation | Indoor, direct vent | Indoor, direct vent |
| Technology | Condensing tankless water heater | Condensing tankless water heater |
| Heat exchanger | Commercial-grade copper primary + Type 316L stainless-steel secondary | Commercial-grade copper primary + Type 316L stainless-steel secondary |
| NOx | Ultra-Low NOx < 14 ng/J (< 20 ppm) | Ultra-Low NOx < 14 ng/J (< 20 ppm) |
| Manifold capability | Easy-Link up to 4 units; Multi-Link up to 20 units with controller | Easy-Link up to 4 units; Multi-Link up to 20 units with controller |
| Warranty | 15-yr limited HX / 5-yr parts residential; 5-yr HX / 5-yr parts commercial | 15-yr limited HX / 5-yr parts residential; 5-yr HX / 5-yr parts commercial |
Published ratings: the Takagi T-H3M-DV-N is rated 15,000–120,000 BTU/h input and 0.9 UEF; the Takagi T-H3M-DV-P is rated 13,000–120,000 BTU/h input and 0.9 UEF. Both list the same published input of 120,000 BTU/h. Both list the same published UEF of 0.9 UEF.
Both records print the same input (120,000 BTU/h), dimensions (22-7/8 × 13-7/8 × 10-13/16 in), water connections (3/4" NPT) and gas connection (1/2" NPT), per the cited sources.
Takagi
The Takagi T-H3M-DV-N is the natural gas indoor 120,000 BTU/h condensing tankless water heater in the T-H3 Series — a DHW-only appliance, not a boiler, rated 0.9 UEF with up to 6.6 GPM maximum flow.
Takagi
The Takagi T-H3M-DV-P is the propane indoor 120,000 BTU/h condensing tankless water heater in the T-H3 Series — a DHW-only appliance, not a boiler, rated 0.9 UEF with up to 6.6 GPM maximum flow.
Yes — both list 120,000 BTU/h in the cited documentation.
Both list the same UEF of 0.9 UEF.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.