Takagi T-H3-OS Natural Gas TH3 Series 199000 BTU Outdoor Whole House Tankless Water Heater

- Item #: BCI2223781

Offer Ends

Originally $1,960.00, You Save 41%
Natural Gas
Free Shipping on LTL freight orders over $1,500.00!
5 In Stock
Ships in 1 to 2 business days, by December 24th


Please select a finish

Earn 1,154 points with the purchase of this product Learn More

and earn 350pts

Questions about Takagi T-H3-OS-NG?

Contact us for advice or more details. Our product specialists are here to help.

This product has additional required/recommended options. To configure, add to your cart.

  • Thermostat Recommended
  • Covers Recommended
  • Recess Box Recommended

This durable Energy Star® qualified tankless hot water heater is perfect for light commercial applications like small restaurants or beauty salon. The TH30 has a .95 energy factor features HRS35 copper alloy for the heat exchanger tubing and is also suitable for heavier residential usages such as domestic recirculation systems and space heating.


  • Capacity 3-4 Showers (Depending on climate)
  • Gas Fired Tankless Water Heater
  • Outdoor Installation Only
  • ENERGY STAR® qualified
  • Links up to 4 Units
  • Multi-Link up to 20 units
  • Safety features (freeze, overheat, surge protection, and troubleshooting diagnostic codes)


  • Max Flow Rate of 10.0 GPM at 35 degree Temperature rise
  • Min 15,000 BTU/h
  • Max 199,000 BTU/h
  • Energy Factor - 0.95
  • Dimensions - H 22.4" x W 17.7" x D 10.7"
  • Weight - 59 lbs
  • Clearance- Top: 36", Bottom: 12", Front: 24", Back: 0.5", Sides: 2 "
  • 100-185 degrees (17 Settings in 5 degree intervals)


  • No venting required
  • Electric Ignition


  • S9007603005 - Temperature Remote Control (Included)
  • 9007674005 or 9007671005- Pipe Cover
  • TH-NT01- Neutralizer Kit.


Why choose Takagi? Takagi produce some of the most highly efficient tankless water heaters in the industry. With a commitment to innovation and quality, they are constantly creating new technology to keep up with their customers’ ever-changing hot water needs. Takagi sets the bar with the most stringent of durability testing standards for all of our models. For 15 years, Takagi has provided the most eco-friendly, energy-efficient water heating solutions in North America.

Additional Takagi Links

Our SKU: Takagi T-H3-OS

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

  • Takagi T-H3-OS-LP
    Liquid Propane
  • Takagi T-H3-OS-NG
    Natural Gas

*Denotes a finish or option that has been discontinued

Takagi T-H3-OS-NG Product Specifications

Specification Sheet
Installation Sheet
Configuration Tankless Water Heater
Depth 10.75
Duct Size 3" Round, 4" Round
Electronic Ignition Type Yes
Energy Factor 0.95
Energy Star Yes
Fuel Type Liquid Propane, Natural Gas
Function Condensing
Gas Connection 3/4"
Height 22.5
Indoor Approved No
Indoor Installation No
LP Energy Factor 0.95
Liquid Propane Input (Min) 13000
Liquid Propane Manifold Pressure 2.7 WC
Low Lead Compliant Yes
Maximum Flow Rate 10
Maximum Gas Input 199000
Maximum Vent Length 100 ft, 70 ft
Minimum Flow Rate 0.4
NG Energy Factor 0.95
Natural Gas Input (Max) 199000
Natural Gas Input (Min) 15000
Natural Gas Manifold Pressure 2.7
Natural Gas Pressure (Max) 10.5
Outdoor Approved Yes
Outdoor Installation Yes
Plug In No
Power Supply AC 120V
Product Weight 59
Voltage 120
Water Connection 3/4"
Water Pressure (Max) 150
Width 17.75

Installation Resource Center

Whether you are installing the product yourself or hiring a professional, our installation Resource Center has everything you need to get your project done. Visit the Installation Resource Center to get started.

Buy the Takagi T-H3-OS-NG in Natural Gas at Build.com. Research Takagi T-H3-OS-NG in Natural Gas online. Find Takagi T-H3-OS-NG in Natural Gas features and specifications. Get the best deal by comparing the Takagi T-H3-OS-NG in Natural Gas today.

Recently viewed items
× Shipping Rates & Methods

The cost to ship items varies by item, shipment and shipping option.

Free Ground Shipping on Orders Over $49 *

Standard ground shipping transit time is 5-7 business days.

Free Freight Shipping on Orders Over $1500 *

Curb side delivery (also called freight or "LTL" shipping) is reserved for large, heavy, or oversized items like chandeliers, bathtubs, shower doors, etc. Items are palletized and loaded onto a large truck for shipment, and delivered to your curb by scheduled appointment. Transit time is 7-10 business days.

* For exact shipping costs, add the product(s) to your cart and enter your zip code. All offers pertain to the lower 48 states and do not include deliveries to Alaska, Hawaii or Canada.

Learn more about shipping rates and policies