Takagi TH3DV Natural Gas TH3 Series 199000 BTU Direct Vent Indoor Whole House Tankless Water Heater

- Item #: BCI2121706

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Natural Gas
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TH3 Series 199000 BTU Direct Vent Indoor Whole House Tankless Water Heater

Direct Vent:The TH3SDV direct vent tankless water heater enables your system to be installed in tight spaces indoors without the worry of combustion. Coupled with an allowable PVC venting system, this condensing tankless water heater requires little space, as it draws and expels its air from outside. All of this functionality and efficiency are seamlessly controlled by a self-diagnostic computer system and controller, making it simple enough for anyone to use.


  • Capacity: 3-4 Showers (depending on Climate)
  • Energy Star Qualified
  • Commercial-Grade Copper Primary Heat Exchanger
  • Effecient, Durable and Easy to Install
  • Complies with Lead Free Standards
  • Includes Built-in Temperature Controller and Diagnostics
  • Up to 10 Gallons Per Minute


  • Energy Factor: .95
  • BTU: 15,000-199,000
  • Gas and Water Connections: 3/4" NPT
  • Weight: 59 Pounds
  • Dimensions: 22.5" H x 17.75" W x 10.75" D
  • Water Pressure: 15-150 PSI
  • Ignition: Electric


  • PVC Venting
  • 4" Backflow preventer and F-F adapter
  • 3" PVC Venting up to 100 ft
  • 0" Clearance
  • Electric Ignition


  • S9007611005- 3" PVC Concentric Termination (Indoor Models Only)
  • Built-in Temperature Remote Control (included)
  • 9007674005 or 9007671005- Pipe Cover
  • TH-NT01- Neutralizer Kit
  • 9007998005 - Wall Thimble with Hood 4"-7"
  • 9007604005 - Lead Free Isolation Valves


Additional Takagi Links

Our SKU: Takagi TH3DV

This product is listed under the following manufacturer number(s):

  • Takagi TH3DV-LP
    Liquid Propane
  • Takagi TH3DV-NG
    Natural Gas

*Denotes a finish or option that has been discontinued

Installation Resource Center

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Takagi TH3DV Reviews

Rated 5 out of 5 by from takagi th3dv Works great so far and that's using well water. Ventdirect price was hundreds of dollars cheaper than anywhere else.
Date published: 2013-12-17
Rated 5 out of 5 by from Excellent product The water heater is excellent, high quality and a good price. On the minus side, the truck shipping (required, due to weight) left something to be desired.
Date published: 2013-09-13
Rated 5 out of 5 by from Takagi TH3DV Natural Gas Tankless H2O Heater We replaced a battleship sized 80 gallon electric hot water tank with the Takagi TH3DV and not only did we gain great performance and efficiency but gained a storage room as well by removing the old tank and placing this shoe box size unit on the wall (actually about the size of three shoe boxes) - It delivers HOT water to the hole house without missing a beat - I even installed a spigot at the unit so I can have hot water for the garage and to wash my cars! We would recommend this unit to anyone.
Date published: 2014-05-05
Rated 5 out of 5 by from Nice! Heats my 46f water to 125 with no troubles Worked better than expected. I wanted a condensing unit so I could vent with PVC (no chimney). I did get the bigger unit since we have some cold water in the winter months (38f). This thing can heat my 46f (test day) water to 140f (highest I went) without any problems. I ran the 2 sinks, tub and washer and it reached those temps with ease. I could have went with the 160k btu unit and would have been safe. It really gets into condensing around 4gpm. Not sure how (because I never touched it after install) my tank heater lasted 19 1/2 years. It's still going but only gives 10min shower in the morning. If this thing last close to that or longer with annual maintenance, I'll be a happy camper :) I'm still curious to see gas usage during summer (water heater and stove) using this Tankless over the tank.
Date published: 2014-03-12

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