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T-H3-DV-P Indoor Tankless High Efficiency Condensing Water Heater (LP)
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MANUALS (5)
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Product Highlights
Description
The Takagi brand has been discontinued by the manufacturer as of December 31, 2025. Suggested replacement units will be available on our website and replacement parts will continue to be available as supplies last. If you'd like any further assistance, please contact our customer service team.
Think Green, Save Green. Rebate and incentive programs provide cash-back to consumers for the purchase of appliances that meet certain energy efficiency standards. Most states are offering rebates in the $50 to $250 range. You can search for rebates in your area from here.
Note: Isolation valves are not included but are recommended for installation.
The all new T-H3-DV/OS is available in 2 models the T-H3-DV (Indoor) and the T-H3-OS (Outdoor) having a max GPM is 10.0. The T-H3 model can easy-link up to 4 units and multi-link up to 20 units. Try the new T-H3-DV/OS and see why Takagi offers the highest efficient and durable commercial tankless heaters on the market.
The T-H3-DV/OS is ideal for commercial applications including small restaurants and beauty salons, utilizing HRS35 copper alloy for the heat exchanger tubing. In addition to the added durability, the T-H3-DV/OS is ENERGY STAR qualified with an 0.93 energy factor. Indoor model includes a built-in temp controller and diagnostics while the outdoor model includes a temp remote controller.
- This unit is NOT approved for installation in Manufacture Homes and is not suitable for space heating applications only.
- Ultra-Low NOx Condensing Technology Provides
- Significant Energy Cost Savings - Unprecedented 0.93 Energy Factor
- ENERGY STAR® Qualified
- Durable HRS35 Commercial-Grade Copper Primary Heat Exchanger
- Type 316L Stainless Steel Secondary Heat Exchanger
- Electronic Ignition - No Pilot Light
- Indoor Model has Built-in Temperature Controller and Diagnostics
- Outdoor Model has Temperature Controller and Diagnostics Included
- Factory-Installed Power Cord Included for Indoor Models
- Complies with Lead Free Standards
- Suitable for Commercial Application (T-H3 Models)
- Easy-Link up to 4 Units with no Additional Parts or Accessories Needed (T-H3 Models)
- Multi-Link up to 20 Units (T-H3 models only)
- Internal Freeze Protection System
- Power Direct Vent Design Provides Flexible
- Venting with PVC, CPVC or ABS
Specs
| Application: | Residential Commercial 2-4 Showers |
|---|---|
| Inlet Gas Pressure: | 8.0"-14.0"W.C. |
| Product Type: | Tankless Heater |
| Energy Factor: | 0.93 |
| Max Flow (GPM): | 10 |
| BTU (Max): | 199000 |
| BTU (Min): | 13000 |
| Fuel Type: | Propane |
| Vent Type: | Direct Vent |
| Type: | Condensing |
| Installation Type: | Indoor Only |
| Energy Star Rated: | Yes |
| Venting Requirement: | PVC/CPVC |
| Height (Inches): | 22.5" |
| Width (Inches): | 17-3/4" |
| Depth (Inches): | 10-3/4" |
| Flow Rate at 70F Temp Rise (GPM): | 5.4 |
| Flow Rate at 60F Temp Rise (GPM): | 6.3 |
| Flow Rate at 50F Temp Rise (GPM): | 7.5 |
| Flow Rate at 40F Temp Rise (GPM): | 9.5 |
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Product Reviews
Most Liked Positive Review
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Takagi Tankless
Most Liked Negative Review
I would not buy this again
Well made prodduct
This is a great upgrade
I would not buy this again
It's a water heater, I hope I don't have to buy it again
I am happy with the performance of this water heater.
Very good love it
A+ customer service
Great product and service!
I'm would buy again
Terrific Product, Terrific Service
Product Q&A
10 QuestionsQ: Hey I'm wondering if you can use this with glycol directly.(without heat exchanged) i want to use if for a dedicated snowmelt system. will there be any issues. also any links to do such thing.
Asked by Rob 3 years ago
Add your answer
Verified Reply- SupplyHouseHi Rob! The use of glycol in the Takagi Tankless Water Heaters will void the manufacturer's warranty. If it is still used despite that, then it cannot be used for radiant heat only, rather It must be an application where the unit is also hooked up to at least one potable water line. However, the warranty will still be void.
Q: Existing ductwork is Stainless.. can I use the existing ductwork with his unit which seems to -only- require PVC. Unit will replace a T-K2.
Asked by mrericyoung 8 years ago
Add your answer
Verified Reply- SupplyHouse StaffThe T-H3 can be vented with Category III stainless steel venting like a TK2 would have used.
Q: Will this unit work with circulating pumps?
Asked by Jim 9 years ago
Add your answer
Verified Reply- SupplyHouse StaffIt could, however the pump would need to be sized properly. From the manual, "The recirculation pump is to provide no less than 2 GPM (7.5 L/min) and no more than 4 GPM (15 L/min) through each activated unit in the system."
Q: how do i get water higher than 160
Asked by Rick 11 years ago
Add your answer
Verified Reply- SupplyHouse StaffFrom the manual, "1. The water heater must be in Stand By to increase the temperature. 2. Press the "HOT" button to set 140 °F (60 °C). 3. Press and hold the "INFO" button and the "HOT" button for at least 3 seconds. The remote will emit a beep and change to 145 °F (63 °C). 4. Press the "HOT" button to set up to 185 °F (85 °C)."
Q: It says water temp max 180 but I can't get indoor model above 160. Using for hot water and baseboard with heat exchanger
Asked by rick 11 years ago
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Verified Reply- SupplyHouse StaffPlease see page 45 of the owners manual for instructions on raising the temperature.
Q: how do I install this model?
Asked by Larry 12 years ago
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Verified Reply- Supplyhouse Staffhttps://s3.supplyhouse.com/product_files/T-H3-DV-P-Install.pdf
Q: What isolation valve kit is available for this?
Asked by Phil 12 years ago
Add your answer
Verified Reply- SupplyHouse StaffPart 9007604005 is the suggested valve kit for this unit.
Q: How do I know which model to purchase? I have a 1300 sq ft house, 850 sq ft on the first floor with radiant heat, 2 showers, no additional heating units upstairs.
Asked by Col 12 years ago
Add your answer
Verified Reply- SupplyHouse StaffThis unit would most likely be a good choice for a dual-use application that includes 850 square feet of space heating and two showers. Space-heating sizing would be based on the BTU requirement. This heater can safely handle up to about 50,000 to 60,000 BTUs with properly sized circulators. Domestic water sizing is based on peak per-minute usage with tankless water heaters. This unit can provide about 5.5 gallons per minute at a 70°F temperature rise. This means that it could handle two simultaneous showers (assuming typical flow rates) during times of the year when the unit would need to make incoming water 70°F warmer. Using a heat exchanger to isolate the space-heating system would normally be recommended in this type of job. Primary/secondary piping will almost always be necessary when using a tankless water heater for space heating. A flow switch can be used to give priority to domestic water. Always check with local code before planning a dual-use application.
Q: Are the LP units convertible to Natural gas at a later date?
Asked by Mike 13 years ago
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Verified Reply- PexSupply StaffNo, you cannot convert LP units to NG.
Q: What is the max output water temp.
Asked by Doug 13 years ago
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Verified Reply- PexSupply StaffWater temperature can be set to up to 185 degrees using the included temperature controller.