TANKLESS PRODUCT GUIDE WWW.TAKAGI.
SAVE ENERGY. Energy-efficient, plentiful, and endless supply of hot water. SAVE SPACE. Compact size and wall-mounted to free up valuable floor space. SAVE MONEY. The smart choice that will save you a substantial amount of energy. Takagi has delivered innovative hot water solutions for more than 70 years, and is sold exclusively by plumbing wholesalers and contractors. Takagi’s selection of residential and commercial tankless water heaters are unmatched for quality and diversity.
Tankless Advantage HOW IT WORKS – The Process: A hot water tap is opened. The opened tap allows water to flow through the water heater. An internal water flow sensor detects this flow. Upon flow detection, the flow sensor sends the activation signal to the computer board. The computer automatically ignites the burner. As water flows through the heat exchanger, it absorbs heat from the burner. By the time the water exits the heater, it has reached the designated set temperature.
Safety At Takagi, we place the safety and reliability of our products above all else. By incorporating technologically advanced safety features into every model, we provide the assurance and peace of mind that can only come from a Takagi quality product. Air-Fuel Ratio (AFR) Sensor Takagi’s unique AFR sensor monitors and maintains proper combustion at all times.
Durability Heat Exchanger with Commercial-Grade Copper Only Takagi incorporates true commercial-grade heat exchangers in our tankless heaters. NOTE: D2 Series, D2U Series, H3 Series and M50 Series non-ASME models. All aspects of the heat exchanger are designed to add the durability and reliability that is vital to any successful commercial organization or business.
Water Valves Making true commercial-grade water heaters involves more than just redesigning our heat exchangers—every internal component has to measure up to Takagi’s commercial standards. Just like our advanced heat exchangers, the longevity and functionality of components such as our water valves and flow sensors are also of great importance.
Secondary Heat Exchanger 316L Stainless Steel (Condensing Models Only) The secondary condensing heat exchanger is made of high-quality 316L stainless steel. This is where the rest of the heat transfer occurs. Due to the lower temperature acidic condensation occurs, and stainless steel is required in order to avoid corrosion.
Water Flow Condensation can build up over time in any heat exchanger, causing damage and premature leaks. Takagi’s commercial models (M50 series) include condensation reduction features that safeguard against these types of damaging effects. Better Water Pathway Design By redesigning and redirecting the flow of water, the temperature of the heat exchanger drum and finned coils stay elevated above dew point, making it much more difficult for condensation to build.
Basic Sizing Guidelines The flow rate capacity of tankless water heaters depends on the temperature difference between the desired output and incoming water temperature. The flow rate comparison chart and table shown here summarize the flow rate charts found in the specifications of each model. Application designers/engineers can decide whether to size for full flow, expected flow, or utilize probability models such as the modified “Hunter Curve.
Flow Rate Guide Temperature Rise vs. Gallons per Minute Temp Rise KJr2/U Series K4/U Series D2/U Series H3MH Series H3JH Series H3SH Series H3H Series M50 Series 30° 6.6 8.0 10.0 6.6 6.6 8.0 10.0 14.5 35° 6.6 8.0 9.3 6.4 6.6 8.0 10.0 14.5 40° 5.7 7.8 8.1 5.6 6.6 8.0 9.5 14.5 45° 5.1 6.9 7.2 5.0 6.6 7.6 8.4 13.5 50° 4.6 6.2 6.5 4.5 6.1 6.8 7.6 12.2 55° 4.2 5.7 5.9 4.1 5.5 6.2 6.9 11.1 60° 3.8 5.2 5.4 3.7 5.1 5.7 6.3 10.1 65° 3.5 4.
T-KJr2-IN The KJr2 Series is great for apartments, one bath homes in cold climates, condos and summer cabins. Remote control included as a standard feature.
Specifications Provides a variety of installation options: indoor, outdoor, and direct vent. Installation Type Indoor, Outdoor, Direct Vent Dimension 20-1/4" (H) X 13-3/4" (W) X 7-3/4" (D) , Weight:33 lbs Electric 120 V Ignition Electronic Ignition Noise Level 53 dB at Max output Warranty Information** Fuel Residential Use: 15 Years limited heat exchanger, 5 Years limited parts Gas Consumption Min. Input Max. Input Energy Factor Gas Pressure Low NOx emissions **Refer to www.takagi.
K4 Series T-K4-OS T-K4-IN The K4 features a max flow rate of 8.0 gpm, providing enough hot water to run three showers at the same time. Remote control included as a standard feature.
Specifications Provides a variety of installation options: indoor, outdoor, and direct vent. Installation Type Indoor, Outdoor, Direct Vent Dimension 20-1/4" (H) X 13-3/4" (W) X 9-1/2" (D) , Weight:38 lbs Electric 120 V Ignition Electronic Ignition Noise Level 53 dB at Max output Fuel Warranty Information** Min. Input Max. Input Gas Consumption Residential Use: 15 Years limited heat exchanger, 5 Years limited parts Energy Factor Gas Pressure Low NOx emissions Flow Rate **Refer to www.
T-D2-IN The D2 series is well suited for residential/commercial applications such as small restaurants and beauty salons. Utilizing commercial-grade copper alloy for the heat exchanger tubing, the D2 series is also suitable for heavier residential usages such as combination space heating and domestic recirculation systems. Remote control included as a standard feature.
Specifications Installation Type Indoor, Outdoor, Direct Vent Thicker heat exchanger drum and utilizes commercial-grade copper (heatresistant) copper for the heat exchanger tubing. Provides a variety of installation options: indoor, outdoor, and direct vent. Includes a pump control port, ensuring efficient operation of all circulation pumps. Easy-Link System capable up to 4 units.
ULTRA-LOW NOx T-KJr2U-IN The KJr2U Series is great for apartments, one bath homes in cold climates, condos and summer cabins. Remote control included as a standard feature. Complies with SCAQMD Rule 1146.2 and other air quality management districts with similar NOx Emission requirements of 14 ng/J or 20 PPM. T-KJr2U-OS KJr2U Series 2.
Specifications Provides a variety of installation options: indoor, outdoor, and direct vent. Complies with Ultra-Low NOx regulations. Installation Type Indoor, Outdoor, Direct Vent Dimension 20-1/4" (H) X 13-3/4" (W) X 9-1/2" (D) , Weight:37 lbs Electric 120 V Ignition Electronic Ignition Noise Level IN: 54 dB OS: 58 dB at Max output 52 W / 0.
T-K4U-IN The K4U features a max flow rate of 8.0 gpm providing enough hot water to run three showers at the same time. Remote control included as a standard feature. Complies with SCAQMD Rule 1146.2 and other air quality management districts with similar NOx Emission requirements of 14 ng/J or 20 PPM. T-K4U-OS K4U Series 2.
Specifications Installation Type Indoor, Outdoor, Direct Vent Dimension 20-1/4” (H) X 13-3/4” (W) X 9-1/2” (D) , Weight: 37 lbs Provides a variety of installation options: indoor, outdoor, and direct vent. Complies with Ultra-Low NOx regulations. Electric 120 V Ignition Electronic Ignition Noise Level IN: 54 dB OS: 58 dB at Max output 76 W / 0.
T-D2U-IN The D2U series is well suited for residential/commercial applications such as small restaurants and beauty salons. Utilizing commercial-grade copper alloy for the heat exchanger tubing, the D2U series is also suitable for heavierresidential usages such as combination space heating and domestic recirculation systems. Remote control included as a standard feature. T-D2U-OS D2U Series 2.
Specifications Installation Type Indoor, Outdoor, Direct Vent Thicker heat exchanger drum and utilizes commercial-grade copper (heat-resistant) copper for the heat exchanger tubing. Provides a variety of installation options: indoor, outdoor, and direct vent. Complies with SCAQMD Rule 1146.2 and other air quality management districts with similar NOx Emission requirements of 14 ng/J or 20 PPM. Easy-Link System capable up to 4 units. MultiLink system capable up to 20 units.
CONDENSING T-H3M-DV The H3M Series is a high efficiency, UltraLow NOx condensing model with a .93 Energy Factor, allowing for the use of 3” or 4” PVC venting or Category IV stainless steel. T-H3M-OS H3M Series Dimensions INDOOR MODEL Front view Side view 13-7/8" (352mm) 10" (254mm) 6-1/4" (158.5mm) 4" (102mm) 4" (102mm) 2-9/16" (64.8mm) 2-3/4" (70.2mm) 10-13/16" (274.6mm) 10-5/16" (262.2mm) 6" (152.1mm) 24" (609.4mm) 22-7/8 (580mm) 58.4 Hot 4-3/4" (121.1mm) Condensate drain port 5-1/16" (129.
Specifications Provides a variety of installation options: indoor, outdoor and power direct vent design. Complies with SCAQMD Rule 1146.2 and other air quality management districts with similar NOx Emission requirements of 14 ng/J or 20 PPM. Installation Type Indoor, Outdoor, SCH 40 PVC Direct Vent or Category IV Stainless Steel Dimension 22-7/8" (H) X 13-7/8" (W) X 10-3/4" (D) , Weight 44 lbs Electric 120 V Ignition Electronic Ignition Noise Level IN: 47 dB OS: 52 dB at Max output Fuel Min.
T-H3J-DV The H3J series offers high efficiency Ultra-Low NOx condensing technology allowing for the use of 3” PVC venting and has 0” clearance to combustibles. Indoor models are certified up to 10,100 ft. altitude.
Specifications Provides a variety of installation options: indoor, outdoor, and direct vent. Complies with SCAQMD Rule 1146.2 and other air quality management districts with similar NOx Emission requirements of 14 ng/J or 20 PPM. Installation Type Indoor, Outdoor, SCH 40 PVC Direct Vent, Category IV Stainless Steel Dimension 23-5/8" (H) X 17-3/4" (W) X 11-1/4" (D) , Weight: 58 lbs Electric 120 V Ignition Electronic Ignition Noise Level IN: 50 dB OS: 53 dB at Max output 73 W / 0.
T-H3S-OS The H3S series offers high efficiency Ultra-Low NOx condensing technology allowing for the use of 3” PVC venting and has 0” clearance to combustibles. Indoor models are certified up to 10,100 ft. altitude.
Specifications Provides a variety of installation options: indoor, outdoor, and direct vent. Complies with SCAQMD Rule 1146.2 and other air quality management districts with similar NOx Emission requirements of 14 ng/J or 20 PPM. Installation Type Indoor, Outdoor, SCH 40 PVC Direct Vent , Category IV Stainless Steel Dimension 23-5/8" (H) X 17-3/4" (W) X 11-1/4" (D) , Weight: 58 lbs Electric 120 V Ignition Electronic Ignition Noise Level 55 dB at Max output Fuel Min. Input Max.
T-H3-DV The H3 is well suited for residential/ commercial applications such as small restaurants and beauty salons. Complies with Ultra-Low NOx regulations. Utilizing commercial-grade copper alloy for the heat exchanger tubing, the H3 is also suitable for heavier residential usages such as combination space heating and domestic recirculation systems. Remote control included as a standard feature. Indoor models are certified up to 10,100 ft. altitude.
Specifications Thicker heat exchanger drum and utilizes commercial grade-copper for the heat exchanger tubing. Provides a variety of installation options: outdoor, and direct vent. Complies with SCAQMD Rule 1146.2 and other air quality management districts with similar NOx Emission requirements of 14 ng/J or 20 PPM. Easy-Link System capable up to 4 units. Multi-Link System capable up to 20 units.
The M50 Series, specifically designed for heavy-duty applications, is the largest Takagi tankless heater yet and the most powerful (14.5 GPM max) in the tankless industry. The M50 Series is suitable for commercial applications (hotels, restaurants, government, convalescent homes, etc.) that require high demand and the most durable of heaters.
Specifications Thicker heat exchanger drum and utilizes commercial-grade copper for the heat exchanger tubing. Incorporates a dual system for redundancy, providing added assurance that the M50 Series will remain operational. Includes an internal pump control port. Easy-Link System capable up to 4 units. MultiUnit System capable up to 10 units. An ASME version of the M50 Series is also available.
EASY-LINK SYSTEM For larger applications that require multiple water heaters to work in conjunction, the T-D2, T-D2U, T-H3, and TM50 series feature the EasyLink system. This allows installers to easily manifold up to 4 units without the need for a system controller. The controls are already built into each model’s internal computer. The Easy-Link system ensures proper modulation, using only the amount of energy required so that there is never any waste.
MULTI- UNIT SYSTEM For even larger applications, the D2U, H3 and M50 Series models also feature the Multi-Unit system, allowing a greater number of units to manifold together. The Multi-Unit System Controller is necessary to enable the Multi-Unit system. The Multi-Unit System can control up to twenty D2Us, H3s, and ten M50s.
Application Diagrams Takagi tankless water heaters can be used in a wide variety of applications. Whether used in recirculation systems, in conjunction with storage tanks or with heating applications, our commercial units are built to provide endless, continuous hot water.
Storage Tank (3 Tappings) *A The air vent is to be installed at the highest location of the system. The diameter of the pipe leading up the air vent is to be no smaller than the piping throughout the system. Air Vent *A *B Hot Water Outlet to Fixtures H C 2. The tank circulation pump is to provide no less than 2 gpm through each activated Takagi’s unit in the system.
Multi-Unit With Storage Air Vent * Multi-Unit Controller 9007675005 (TM-MC01) Hot Water Outlet to Fixtures Tankless Water Heater H C Tankless Water Heater H C ULN Models use 9008300005 (TM-MC-02) *5 or more units require a multi-unit controller Gas Supply Storage Tank Drain Tank Circulation ** Cold Water Inlet Y-Strainer Hot Water Return (Optional) * The air vent is to be installed at the highest location of the system.
Solar Tankless Back Up COLLECTOR SENSOR TANKLESS WATER HEATER H SOLAR COLLECTOR TEMPERED HOT WATER C GAS SUPPLY T AQUASTAT TANK SENSOR COLD WATER INLET SOLAR CONTROL STORAGE TANK * The air vent is to be installed at the highest location of the system. The diameter of the pipe leading up the air vent is to be no smaller than the piping throughout the system. ** 1. Control of the primary loop pump is dependent on the requirement of the heating application. ** 2.
Venting Diagrams (Examples) 4” Sidewall Termination (Please check the wall thickness for proper installation) 2 1 3 Models KJr2/U, K4/U, D2/U, 4” Combustible Sidewall Termination Kit Part Number: 4 9008339005 Qty. 1 9007999005 4" Sidewall Hood Terminator 1 2 9008345005 4" Wall Thimble (4.0"-7.0") 1 3 9007980005 4" 90 degree Elbow 1 4 9007979005 4" Female-Female Adaptor 1 1 2 3 Models KJr2/U, K4/U, D2/U 4" Non-Combustible Sidewall Termination Kit Part Number: 9008481005 37 Qty.
Up & Out Standard Installation Combustible Wall 4” Sidewall Termination (With Condensate Trap) (Please check the wall thickness for proper installation) Models KJr2/U, K4/U, D2/U 3 4" Combustible Sidewall Termination (With Condensate Trap) 1 4 Kit Part Number: 9008489005 Qty. 1 9007999005 4" Sidewall Hood Terminator 1 2 9008345005 4" Wall Thimble (4.0"-7.
Direct Vent, Concentric Sidewall Termination KJr2/U, K4/U, D2/U Models Models KJr2/U, K4/U, D2/U 1 5-10” Sidewall Thickness Direct Vent, Concentric Termination Kit Part Number: 9008001005 3 1 9008147005 Concentric Intake/Exhaust Kit 1 2 9008146005 Universal Appliance Adaptor 1 3” Aluminum Flex 1 Direct Vent Conversion Kit 1 3 N/A 4 9007667005 12-18” Sidewall Thickness Direct Vent, Concentric Termination 2 Kit Part Number: 9008000005 9008147005 Concentric Intake/Exhaust Kit 1 2 90
Vertical Venting: Flat Roof Termination 4” Rooftop Termination Models KJr2/U, K4/U, D2/U 1 3 4” Flat Roof Termination 2 Kit Part Number: 9008340005 Qty.
5” Sidewall Termination 2 Model M50 5" Combustible Sidewall Termination 3 1 4 Kit Part Number: 9008342005 Qty. 1 9008197005 5" Sidewall Hood Terminator 1 2 9008347005 5" Wall Thimble (4.0"-7.0") 1 3 9008188005 5" 90 degree Elbow 1 4 9008203005 5" Female-Female Adaptor 1 1 2 3 Model M50 5" Non-Combustible Sidewall Termination Kit 8 Part Number: 9008482005 41 Qty.
5” Sidewall Termination (With Condensate Traps) 2 Model M50 5" Combustible Sidewall Termination (With Condensate Trap) 3 4 1 Kit 9 Part Number: 9008491005 Qty. 1 9008197005 5" Sidewall Hood Terminator 1 2 9008347005 5" Wall Thimble (4.0"-7.0") 1 3 9008188005 5" 90 degree Elbow 1 4 9008201005 5" Universal Appliance Adaptor 1 1 2 3 Model M50 5" Non-Combustible Sidewall Termination (With Condensate Trap) Kit 10 Part Number: 9008492005 Qty.
5” Rooftop Termination 1 Model M50 7 3 5” Flat Roof Termination 1 2 Kit Part Number: 9008343005 Qty.
Venting Components Simple Leak-Proof Gasketed Connections – No Sealant Required. High Quality – Category III / IV Stainless Steel. Versatile – Vertical and Horizontal Terminations. Convenient – Vent Kits Available. UL Listed. All Connections have Heat-Resistant Rubber Gaskets.
Nova Vent Part # DESCRIPTION Nova Vent Part # DESCRIPTION TERMINATION INTAKE HOOD (GALVANIZED) 9008144005 4” Termination Tee 9008142005 3” 9008198005 5” Termination Tee 9008143005 4” 9008180005 5” 9007999005 4”Exhaust Sidewall Vent Terminator (Hood) 9008197005 5”Exhaust Sidewall Vent Terminator (Hood) 9007995005 4” Rain Cap 9008145005 4” Extreme Weather Rain Cap 9008200005 5” Extreme Weather Rain Cap 9007611005 DIRECT VENT, CONCENTRIC SIDEWALL TERMINATION KIT Includes : DV Convers
T-H -DV 3M T-H -OS 3J T-H -DV 3J T-H -OS 3 T-H S-DV 3 T-H S-OS 3-D T-H V 3 T-M -OS 50 T-K Jr T-K 2/U-I N J T-K r2/U 4/U -OS T-K -IN 4 T-D /U--O S 2 T-D /U-IN 2 T-H /U-O S 3M Accessories ACCESSORIES 9007677005 Outdoor Vent Cap 9007674005 Recess Box x x x 9007671005 x 9007670005 9007673005 9008331005 9008953005 x* x* x Pipe Cover x x x x x x x x x x x x x x 9007675005 x Multiple Unit Controller 9008300005 9007666005 9007603005 x* x* Remote Temperature Controller (Not compatible wit
Hard Water and Tankless Heaters Hard water can adversely affect plumbing systems, from water piping to water fixtures and even down to the water heating system. For piping and fixtures, hard water can create more pressure loss and reduce water flow. For water heaters, it can even reduce energy efficiency and damage the heater.
Where is hard water found? Hard water is everywhere. In fact, more than 85% of American ALASKA homes have hard water.
I = Inside Connection: Gas/Water Power Venting Intake Exhaust (Cat. III Stainless) Easy-Link (EL) Multi-Unit (MU) Temperature (with remote) GPM (Max) Per Unit Energy Factor NG, LP NG Max (BTU/h), LP Max (BTU/h) Dimension/ Weight High efficiency ultra-low NOx condensing tankless. 3” PVC venting. 0” clearance to combustible.
Takagi Tankless Water Heaters | 500 Wald, Irvine,CA 92618 | Toll Free: (888) 882-5244 | Fax: (949) 770-3171 TBGBR00210 | © Copyright Takagi December 2015 | Printed in U.S.A. WWW.TAKAGI.COM NRBBR00107 Printed in U.S.A.
