Electric Low Capacity

Light Duty Commercial

Electric cement lined water heater Model E
  • Light Duty
  • 6 - 119 Gallon Capacity
  • Up to 12KW - 1 Phase or 3 Phase

Ceiling Hung Horizontal

Electric horizontal ceiling hung water heater Model HE/HSE
  • Horizontal, Ceiling Hung
  • 19 or 30 Gallon Capacity
  • Up to 20 KW - 1 or 3 Phase

Heat Pump

Hybrid electric heat pump water heater Model PBX
  • Heat Pump Water Heater
  • 40 - 119 Gallon Capacity
  • 1 or 3 Phase

Point-Of-Use Water Heater

Mini compact point of use water heater
  • Point-of-Use
  • 2.5 Gallon Capacity
  • Digital Display

Point-Of-Use Storage

Point-of-use electric water heater Model CE110
  • Point-of-Use
  • 1 Gallon Capacity
  • 1000 or 450 Watts - 1 Phase

Point-Of-Use Tankless

Electric tankless point-of-use water heater Model R Tankless
  • Whole House / Point-of-Use
  • Availabe 3 thru 27 KW - 1 Phase

Circulation (Instantaneous)

Electric circulation heater Hubbell Model CR
  • Circulation (Instantaneous)
  • Heavy Duty Construction
  • 25-1600 KW - 1 or 3 Phase

Industrial Process Heater

Model V16
  • Process Systems & Industrial
  • ASME Stamped
  • Up to 88 KW - 1 or 3 Phase

Heavy Duty Commercial

Commercial heavy duty electric storage water heater Model SE
  • Heavy Duty
  • 6-119 Gallon Capacity
  • Up to 58 KW - 3 Phase

Tankless Commercial

Electric tankless water heater Model HX/TX
  • Tankless Commercial
  • Highly efficient tankless
  • Up to 162 KW - 1 or 3 Phase

Large ASME

Large capacity electric storage tank water heater Model SH
  • Large Capacity
  • 80-5000 Gallon Capacity
  • All KW ratings - 1 or 3 Phase

Commercial Condensing Gas Water Heater

Gas tankless water heater Model NX
  • High Efficiency Condensing Burner
  • 316L SS ASME Heat Exchanger
  • BTU input from 200,000 to 800,000 MBH

Commercial/ Industrial
Condensing Gas Water Heater

Gas tankless water heater Model NXT
  • High Efficiency Condensing Burner
  • 316L stainless steel and ASME stamped heat exchanger
  • BTU input from 200 to 400 MBH

DI / RO Gas

DI/RO gas fired tankless water heater Model DGX
  • DI/RO Water Heater
  • High Efficiency Condensing Burner
  • 199,950 and 250,000 BTU

Condensing Gas
Storage Water Heater

Condensing gas storage tank water heater Prime
  • High Efficiency Condensing Burner
  • Removable 316L SS Heat Exchanger
  • 55,000 BTUs

Large ASME
Steam Heater

Steam fired water heater large capacity Model ST
  • Storage Type
  • 80-5000 Gallon Capacity
  • ASME Stamped

Packaged Semi-Instantaneous

Semi-Instantaneous Steam Fired Water Heater Model STX
  • Semi-Instantaneous
  • Space saving design
  • Provides 10,500 GPH


Storage tank steam fired water heater Model PS
  • Light Duty
  • 65-119 Gallon Capacity
  • For low demand/recovery

High Capacity Instantaneous

Instantaneous steam fired water heater Model F
  • Instantaneous
  • 7 Sq. Ft. of floorspace
  • Up to 120 GPM

Semi-Instantaneous Indirect

Indirect fired semi-instantaneous water heater Hubbell Model BWX
  • Semi-Instantaneous
  • Vertical or Horizontal
  • ASME Stamped

Large ASME

Indirect fired storage tank water heater Hubbell Model BW
  • Storage Type
  • Vertical or Horizontal
  • 80-5000 Gallon Capacity

Small Capacity Indirect

Indirect fired storage tank water heater model T Transflow
  • Indirect Fired
  • 35-119 Gallon Capacity
  • Utilizes boiler water


Solar water heater Model SLN
  • Solar Heater
  • Vertical Storage Type
  • 65-119 Gallon Capacity

Indirect Plate Heat Exchanger

Plate Heat Exchanger Indirect Fired Water Heater Model BWP
  • Fully Packaged System
  • Full Range of Styles/Sizes
  • Storage Type

Indirect Plate Heat Exchanger

Plate Heat Exchanger Indirect Fired Water Heater Model BWXP
  • Compact Design
  • Instantaneous
  • Replaceable brazed plate or plate and frame


ASME and None ASME storage vessels Hubbell Model StorageTank
  • ASME & Non ASME designs
  • Hydrastone Cement
  • Vertical or Horizontal


ASME and None ASME storage vessels Hubbell Model BufferTank
  • Carbon Steel Construction
  • Long Warranty
  • ASME Section VIII, Division 1


Electric hazardous location water heater Model ER
  • Hazardous Location
  • 10-5000 Gallon Capacity
  • Up to 1600 KW - 1 or 3 Phase

Tepid Water for Emergency Fixtures

Electric safety shower water heater Model EMV
  • Emergency Tepid Water
  • Fully packaged system
  • Integrated mixing valve

Industrial Process Heater

Model V16
  • Process Systems & Industrial
  • ASME Stamped
  • Up to 88 KW - 1 or 3 Phase

RO / DI Heater Compact

DI/RO electric hot water heater Model HD
  • RO/DI Water Heater
  • Point-of-Use Heater
  • Up to 88 KW - 1 or 3 Phase

RO / DI Heater Storage

DI/RO electric hot water heater Model D
  • RO/DI Water Heater
  • 1-119 Gallon Capacity
  • Up to 88 KW - 1 or 3 Phase

Emergency Shower Tankless

Electric tankless safety shower water heater Model ETX
  • Tankless Emergency Tepid Water
  • NEMA 4 Standard
  • Up to 88 KW - 1 or 3 Phase

Fully Integrated Package

Model Packaged Skid Electric Fluid Heating System
  • Customized to your specifications
  • Full featured system ready for your application

Industrial Process Heater

Electric process industrial water heater Model V
  • Customized to your specification
  • Full featured system ready for your application

Light Duty

Electric water heater for shipboard marine use single phase power Model ME
  • Light Duty
  • 6-119 Gallon Capacity
  • Up to 6 KW - 1 Phase

Heavy Duty

Electric water heater for shipboard marine use three phase power Model MSE
  • Vertical
  • 6-119 Gallon Capacity
  • 1 or 3 Phase - Up to 58 KW

Large ASME

Electric water heater for shipboard marine use large capacity Model MSH
  • Large Capacity
  • 80-5000 Gallon Capacity
  • All KW ratings - 1 or 3 Phase


Naval shipboard marine electric water heater Hubbell Model 177
  • MIL Spec Navy Heaters
  • Comforms to MIL-H-965
  • Shock and EMI protection


Electric tankless water heater for shipboard marine use model MHX/MTX
  • Tankless Marine Heater
  • Provides 180°F water
  • 11 to 54 KW - 1 or 3 Phase

Fully Integrated Package

Shipboard Electric Water Heating System Model Integrated Skid
  • Customized to your specifications
  • Full featured system ready for your application

Electric Booster

Electric booster water heater Model J
  • Booster Heater
  • Provides 180°F water
  • Up to 88 KW - 1 or 3 Phase

Foodservice Tankless
Electric Booster

Electric tankless booster heater Model JTX
  • Tankless Booster Heater
  • Provides 180°F water
  • 11 to 54 KW - 1 or 3 Phase

Foodservice Gas
Fired Booster Heater

Gas fired booster heater Model PT
  • Gas Booster Heater
  • High Efficiency Condensing Burner
  • 55,000 to 199,000 BTU

Foodservice Point-of-Use
Water Heaters

Mini compact 2.5 Gallon Booster Heater
  • Hot water for remote locations
  • Perfect for glasswashers
  • 120V models available

Foodservice Sanitizing
Sink Heater

Model JSK
  • Provides rinse water for manual warewashing
  • Perfect for 3 compartment sinks
  • Available in 3,4,6 or 9 KW

Food Rethermalizer Baine-Marie Heater

Model JFR
  • Mounts under sink or holding vessel
  • Keeps food at SERV safe temperature
  • Available up to 9 KW

Foodservice Point-of-Use
Water Heater

Compact point-of-use electric water heater Model J1SSA
  • Point-of-Use
  • 1 Gallon Capacity
  • 1000 Watts - 1 Phase

Immersion Heating

Electric immersion tubular style heaters
  • Immersion Electric Heaters
  • Flanged or Screw Plugs Types
  • All KW ratings - 1 or 3 Phase

Heat Transfer

Heat exchanger and heating coil water heaters
  • Immersion Heat Transfer Coils
  • U tube type
  • Range of Materials

Stainless Steel T & P
Relief Valve

Stainless Steel T & P Relief Valve
  • 316 L Stainless Steel construction
  • Corrosion Resistant
  • ASME Section IV, HV Stamped

Gas Heat Exchanger

gas hx
  • 316 L SS Heat Exchanger/Burner
  • 55,000 BTU/HR input
  • Digital temperature controller
Electric High Capacity
Gas Fired
Steam Fired
Special Purpose
Foodservice Equipment
Elements & Exchangers
Product Center
Electric tankless booster heater Model JTX
Still have questions? Complete this form
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Model JTX

Foodservice Tankless Electric Booster Heater

Available up to 54 KW
Single or Three Phase Voltages

The Hubbell model JTX Tankless electric booster heater is a highly reliable and easily maintained heater designed for operation in your commercial kitchen. The Hubbell JTX Tankless heater is compact, extremely efficient, takes up no floor space, and reduces operating costs. Hubbell's vast experience, meticulous engineering and advanced technology ensure that you can rely on the model JTX for your sanitizing rinse needs. The Hubbell JTX Tankless Booster Heater is the right choice for your booster heating requirements, as you will be providing your customer with a quality product that is long lasting, trouble-free and energy efficient.

Lead Free Product cULUS Listed ANSI NSF 5
  • Heavy Duty Construction

    • Constructed with high grade materials to ensure long operating life
    • Turn-Key package is simple to specify and easy to install and operate
    • Factory wired electrical controls provide trouble-free installation and operation
  • Advanced Design

    • Engineered specifically for use in commercial kitchens
    • Wide selection of sizes to meet the needs of all dishmachine manufacturers
    • Compact wall mount design saves precious floor space
    • Digital display provides clear indication of set point temperature and fault conditions
  • High Efficiency

    • On demand heating provides environmentally friendly low cost operation
    • Instantaneous design essentially eliminates stand-by heat loss and signifcantly lowers operating costs compared to traditional tank type booster heaters
    • Over 98% efficient and saves over 2300 kW hours per year compared to tank type booster heaters

The Hubbell Model JTX electric tankless booster heater contains high powered heating elements that heat water only when there is demand from the dishmachine. When hot water is needed, a built in flow sensor measures the exact flow rate and that data combined with temperature readings at the heater's inlet and outlet are processed by the electronic temperature controller. This data is continuously transmitted to the temperature controller, which constantly calculates the precise amount of power (kW) needed to achieve the desired temperature. A zero cross over firing signal is sent to the heater's fast acting triacs in order to modulate the heating elements to the precise level needed to meet demand. The Hubbell tankless booster heater uses only as much power as is needed, while delivering accurate and consistent hot water temperature.

Note: The Hubbell Model JTX is designed for use with conveyor and flight type dish machines. This product is not intended for use with door style dish machines.

Heater Overview

Model JTX Heater Overview

Tankless Booster Saves Money

Energy Savings

By heating water more efficiently...over 98% efficient...and essentially eliminating standby heat loss, the typical owner will save over 2300 kW·Hrs per year! Add to that the reduced maintenance costs of the Hubbell tankless booster compared to a tank type booster and the annual savings easily add up to over $750 per year.
2300 kW·Hrs x $0.16 per kWh = $368.00 Annual Energy Savings

Space Saving:

Free up floor space, improve the look and cleanliness of your kitchen, and improve the longevity of your booster when you mount the Hubbell tankless on the wall.

Typical JTX Plumbing Installation

Typical JTX Plumbing Installation

Model JTX Water Heater Specifications

Heating Chamber: Copper and Bronze
Capacities: 8 thru 54 kW
Orientation: Wall Mounted
Voltages: 208 thru 600 Volt 50/60 Hz
Phase: 1 Φ and 3 Φ (Balanced)
Power Factor: 0.999
Thermal Efficiency: 98% +
Inlet/Outlet Size:
JTX: 3/4" Dielectric Union Copper Sweat
JHX: 1" Dielectric Union Copper Sweat
Min/Max Flow:
JTX: 0.2 GPM Min, 8.0 GPM Max
JHX: 0.5 GPM Min, 40 GPM Max
Thermostat Range: 32-194°F / 0-90°C
Hi-Limit: 200°F (Fixed)
Design WP: 150 psi
Design TP: 300 psi
Elements: Incoloy 800
Standby Power: < 3 Watts
Chamber Warranty: 5 Year
Electrical Warranty: 1 Year
Labor Warranty: 1 Year
Enclosure: Stainless Steel Brushed Finish
Approvals: cULus, UL EPH ANSI/NSF 5

General Specifications

Temperature Controller

A sophisticated electronic temperature controller with LED digital display provides the user interface. The temperature controller processes all flow and temperature data and calculates the precise amount of power needed to meet demand.

Operator Control Capabilities
Checkmark Power Limiting: Allows the operator to reduce the power consumption by any percentage to provide installation and operational flexibility and savings.
Checkmark Diagnostics: Display inlet and outlet temperatures, flow rate and error codes to assist in troubleshooting.
Checkmark Cost Calculator: Determine the exact cost of operating the heater. Input your cost per KW·Hr and the controller displays total KW·HRs consumed, total cost of operation, and total hot water usage (shown in gallons or liters).
Checkmark Temperature Control: Set the digital display to the desired water temperature in °F or °C.  Fully adjustable in 1° increments from 32-194°F (0-90°C). A user adjustable +/- 3° calibration feature provides additional control for superior accuracy.

Full Heater Modulation

Each heating element is switched on/off using a fast acting solid state triac with zero cross over firing control. This switching schema provides full modulation of each heating element, ensuring that the precise amount of heat is added to meet demand. To improve operating efficiency and component longevity, each triac is mounted to a heat sink located on the incoming supply piping so that heat generated by the triac during the switching process is dissipated into the water.

Proper Power Integrity

All Hubbell tankless water heaters, including all 3 phase models, are engineered to operate as a balanced load and operate at 0.999 Power Factor. All Hubbell 3 phase models are designed for 3 wire (3 live, 1 ground) and 4 wire power systems and draw equal current across all conductors to maintain the power integrity of the users electrical system. Hubbell does not recommend the use of heaters that operate as an unbalanced load, as is common with staged heaters designed for star systems (3 live, 1 neutral, 1 ground) that require use of the neutral leg.  All load switching in Hubbell tankless models is performed as zero cross over, eliminating phase angle firing interference and associated EMI issues.

Full Resource Staging

The Hubbell tankless control schema ensures that usage is equalized across all heating circuits. To achieve this, once the controller has calculated the precise amount of kW required, all circuits are energized in a staggered fashion such that each circuit is proportionally and independently energized and then time staggered between circuits. This Full Resource Staging Schema reduces EMI output, increases component longevity, and provides highly accurate and consistent hot water temperatures.  For three phase models, all circuits are fully modulated and synchronized to operate as a balanced load.

Building Management Integration

Remote Control:Ability to remotely enable or inhibit the heating operation of the unit using one of the following two methods:
1. Customer supplied 24VDC signal is user configured for either Inhibit Mode or Normal Operation Mode.
2. Customer supplied volt free contact is user configured for either Inhibit Mode or Normal Operation Mode.

Priority Control: An integrated SPDT potential free dry contact (NO/NC 10A @ 240VAC) energizes when the unit is heating and de-energizes when not heating. This feature is useful when it is desirable to give the water heater priority over another electrical load to ensure that both are not operational at the same time.

Outline Dimensions and Model Selection

8-27 KW Models (2 and 3 Element)

Model JTX 8-27 kW Model Outline Dimensions

Base Model
KW BTU/Hr Rating KW Selection
3 Phase Voltages 1 Phase Voltages
208V 240V 480V 600V 208V 240V
JTX008 8 27,296 checkmark (2)
JTX011 11 37,532 checkmark (3) checkmark (2)
JTX012 12 40,944 checkmark (3) checkmark (2)
JTX014 14 47,768 checkmark (3) checkmark (2) checkmark (2)
JTX016 16 54,592 checkmark (3) checkmark (3) checkmark (3) checkmark (2)
JTX018 18 61,416 checkmark (3) checkmark (3) checkmark (3) checkmark (2)
JTX020 20 68,240 checkmark (3) checkmark (3)
JTX021 21 71,652 checkmark (3) checkmark (3) checkmark (3) checkmark (3)
JTX024 24 81,888 checkmark (3) checkmark (3) checkmark (3) checkmark (3)
JTX027 27 91,124 checkmark (3) checkmark (3) checkmark (3) checkmark (3)
Note: Chart indicates three element (3) and two element (2) model types

24-54 KW Models (6 Element)

Model JTX 24-54 kW Outline Dimensions
Base Model
KW BTU/Hr Rating KW Selection
3 Phase Voltages 1 Phase Voltages
208V 240V 480V 600V 208V 240V
JTX024 24 81,912 checkmark (6) checkmark (6)
JTX031 31 105,803 checkmark (6) checkmark (6)
JTX033 33 112,629 checkmark (6) checkmark (6)
JTX036 36 122,868 checkmark (6) checkmark (6) checkmark (6)
JTX040 40 136,520 checkmark (6) checkmark (6)
JTX042 42 143,346 checkmark (6) checkmark (6) checkmark (6) checkmark (6)
JTX048 48 163,824 checkmark (6) checkmark (6) checkmark (6) checkmark (6) checkmark (6) checkmark (6)
JTX054 54 184,302 checkmark (6) checkmark (6) checkmark (6) checkmark (6)
  • All models shown in this chart are six element (6) model types
  • The Hubbell Model JTX is designed for use with conveyor and flight type dish
    machines. This product is not intended for use with door style machines.
  • Shaded models are factory supplied with a separate circuit breaker panel box

Heating Capacity and Amperage Chart

KW Rating Heating Capability in GPH at °F Temperature Rise (°FΔT) MAX Amps (at 100% heater output)
3 Phase Voltages 1 Phase Voltages
208V 240V 480V 600V 208V 240V
8 164 109 82 55 47 41 33 30 27 23 - - - - 38 -
11 225 150 113 75 64 56 45 41 38 32 31 - - - - 46
12 246 164 123 82 70 61 49 45 41 35 33 - - - 58 -
14 287 191 143 96 82 72 57 52 48 41 - 34 - - 67 58
16 328 218 164 109 94 82 66 60 55 47 44 39 - - 77 67
18 368 246 184 123 105 92 74 67 61 53 50 - 22 - 87 75
20 409 273 205 136 117 102 81 74 68 58 56 - - - 96 -
21 430 287 215 143 123 107 86 78 72 61 - 51 25 20 - 88
24 491 328 246 164 140 123 98 89 82 70 67 58 29 23 115 100
27 553 368 276 184 158 138 111 100 92 79 - 65 33 26 - 113
31 635 423 317 212 181 159 127 115 106 91 86 - - - 149 -
33 676 450 338 225 193 169 135 123 113 97 - 79 - - - 138
36 737 491 368 246 211 184 147 134 123 105 100 - 43 - 173 -
40 819 546 409 273 234 205 164 149 136 117 111 - - - 192 -
42 860 573 430 287 246 215 172 156 143 123 - 101 51 40 - 175
48 983 655 491 328 281 246 197 179 164 140 133 116 58 46 230 200
54 1105 737 553 368 316 276 221 201 184 158 - 130 65 52 - 225
Alternate voltages including 277, 380, 415, 440 and 575 volt available. Please contact us directly for exact KW availability in these voltages.
Unshaded flows specify Base Model JTX, shaded flows must specify Base Model JHX due to flows exceeding 8 GPM.
The Hubbell Model JTX is designed for use with conveyor and flight type dish machines and is not intended for use with door style dish machines.

Sizing Formulas

Step 1

KW Requirement:
________ GPH x ________ °FΔT x 0.00244 = ________ KW
Temperature Rise:
________ KW x 410 ÷ ________ GPH _________ °FΔT
Flow Rate:
________ KW x 410 ÷ ________ °FΔT = __________ GPH

Step 2

Choose the Tankless model with the KW rating which meets the peak demand (GPH) and required temperature rise (°FΔT) for your application.

Step 3

Choose the supply voltage available. Note the maximum amperage draw of the unit and verify availability.

Voltage De-Rating Factors

Rated Voltage Applied Voltage De-Rating Factor
600 V 575 V 92%
600 V 550 V 84%
480 V 460 V 92%
480 V 440 V 84%
240 V 230 V 92%
240 V 220 V 84%
240 V 208 V 75%
When the actual supply voltage (applied voltage) is different than the design voltage (rated voltage) the resulting KW output will be affected. Please see the chart for typical voltage de-rating factors, or use the following formula.
(Applied Voltage² ÷ Rated Voltage²) x Rated KW = KW output at applied voltage

The Hubbell Model JTX tankless booster heater is designed for use with conveyor and flight type dishmachines. If the dismachine is not listed, or if the application is other than a conveyor or flight type dishmachine, please contact us directly for assistance.

Dishmachine Make & Model Number Hubbell Tankless
Minimum KW
40°F Rise 70°F Rise
CSL-1390, CA-2, CA-3, CA-4, SLAP 44 39 72
CA, CA-1 54 90
ACD-44, ADC-66 12 24
Series "R" & " F" -CC, -EE, -LL, -MM, -LLL, -MMM, -PCC, -PEE, -PLL, -PMM (multi-tank) with suffix "LC" 13 24
Series XF-EE, XF-LL 17 30
Series XF-LL, XF-PLL, XF-MM, XF-PMM, XF-EEE, XF-LLL, XF-MMM (Multi-tank) with suffix "LC" 17 30
DD-8 18 30
Series R-L, R-PL, R-M, R-PM, F-L, F-PL, F-M, F-PM (single tank) 36 54
Series R-E, R-PE, XF-PEE, XF-PLL, XF-PMM, XF-EEE, XF-LLL, XF-MMM (multi tank) 45 60
NOTE: FA (Flight-A-Round) and RA (Rack-A-Round) use comparable "F" listing.
44DR, 66DRPW, 80DRHDFW, 70DRFFPW 12 24
66 WSPW, 44-WS, 66-WS, 64, 90FFPW, 100HDPW, 86PW, 84, 106PW,120HDPW, 110FFPW 13 24
UC-CW6-WS 24 36
US-CW8-WS 24 39
44, 66 PW, 70FFPW, 80HDPW, 54, 76PW, 80FFPW, 90HDPW 24 45
40-KB, 44-KB-2-2, 40-KFWB, 40-KPRB, 40-KPRB-2-2, 40PRB-2-3, 60-KB, 60-KB-2-2, 60-KFWB, 60-KFWB-2-2, 60-KPRB, 60-KPRB-2-3, 64KB, 64-KB Corner, 64-KPRB Corner, 64-KPRB, 64-KPRB Corner, 64 Modular,86 Modular 30 54
44-KB, 44-KB Corner, 44-KPRB, 44-KPRB Corner, 54-KB, 54-KB Corner, 54-KPRB, 54-KPRB Corner, 44 Modular, 66 PW Modular, UC** Series 6' Center, UC-C4 36 57
CMA-44H with tank heater, CMA-66H 36 45
Opti-Rinse Models: C44A, CRS-66A, CCS-66A,
CPW-80A, C54A, CRS-76A, CCS-76A, CPW-90A, C64A, CRS-86A, CCS-86A, CPW-100A, C88A, CRS-110A,
CCS-110A, CPW-124A
15 27
C-54A, CRS-76A, CPW-90A, CCS-76A 39 72
C-44A, CRS-66A, CCS-66A, CPW-80A, C-64A, CRS-86A, CCS-86A CPW-100A 30 54
C-88A, CRS-110A, CPW-124A, CCS-110A 36 54
Opti-Rinse Models: C44AW, CRS-66AW, CCS-66AW, CPW-80AW 9 15
C-44AW, CRS-66AW, CPW-80AW, CCS-66AW 12 24
C-44, CRS-66, CPW-80 36 54
C-54, CRS-76, CPW-90 54 78
C-64W, CRS-86W, CPW-100W, C-88W, CRS-110W,
CPW-124W, CCS-86W
24 36
C-64, CRS-86, CPW-100 45 72
CL44e, CLPS66e, CLCS66e 15 24
CL54e, CLPS76e, CLCS76e 15 27
CL64e, CLPS86e, CLCS86e 15 27
FT800W, FT-900W 24 39
FT-600, FT-700 54 78
FT800 39 78
Opti-Rise FT800 36 57
FT-900 36 58
FT800S, FT-900S 39 72
Admiral 44, 66 15 27
Admiral 44-4, 66-4 24 36
135-20, 185-20, 250-20, 60-20, 85-20, R-106-2 24 45
Speeder 64, 86-3, Century (all), Super 106-2 24 45
Trac 878 24 36
Century 14, Clipper RC-##-RPW-W 24 39
Clipper (all), R106-2, Super 106-2, Trac 321,
Trac 321-2/RPW
27 45
Defender-(1) 30 54
Defender 36 54
Master (all) 36 57
44CE, 66 CERPW 30 54
54CE, 76 CERPW 36 60
64CE, 86 CERPW 27 39
TS-44, TS-66 24 36
AJ-44, AJ-66, AJ-80, WH-44, ES-4400, ES-6600
24 45
AJ-54, AJ-76, AJ-90 30 54
AJ-64, AJ-86, AJ-100 24 39
NOTE 1: Model 44CE with serial no.1999 or below requires larger booster than listed.
K-44, K-66, K-80 24 36
K-54, K-76, K-90, K-64, K-86, K-100 24 45
SCT-44-10-LW, SCT-44-LW, SCT-66S-LW, SCT-76S-LW, SCT-76SC-LW, SCT-90S-LW 12 24
SC-1-2-4-LW, SC-1-6-4-LW, SC-2-4-LW, SC-5-2-4-LW, SC-5-6-4-LW, SC-6-4-LW 24 45
SCT-64, SCT-86S, SCT-94S, SCT-94SC 24 39
SCT-108S, SCT-108SC, SCT-76, SCT-94SM 27 54
SC-6-4, SCT-44, SCT-44-10, SCT-66S, SCT-76S,
30 54
SCT-120S, SCT-120SC, SCT-120SM, SCT-150SM 36 57
STW-110, SC-1-2-7-4, SC-1-6-3-4, SC-1-6-7-4, SC-2-7-4, SC-5-2-7-4, SC-5-6-3-4, SC-5-6-7-4, SC-6-3-4, SC-6-7-4 39 72
SC-1-2-4, SC-1-6-4, SC 2-4, SC-5-2-4, SC-5-6-4 45 72
SCT-44-10-SC-1-3-4, SCT-44-10-3-4, SCT-44-SC-1-3-4, SCT-44-SC-3-4, SCT-54-SC-1-3-4, SCT-54-SC-3-4, SCT-76S-SC-3-4 45 72
STPC (Four Tank) 24 39
STPCW (Four Tank) 24 45
STPC 27 54
STPCW 36 60
SCBT 45 72
SCT-54, SCT-76SM 36 58
SCT-76, SCT-80, SCT-94, SCT-108, SCT-120 45 58
STBUW-14 58 108
SC-2-3-4, SC-5-2-3-4 30 54
SC20-2 12 24
SC-2-8, SC-2-9, SC-1-2-8, SC-5-6-8, SC-6-8, SC-6-9,
SC-1-6-8, SC-5-6-9, SC-5-2-9, SC-1-6-9, SC-5-2-8
18 36
NOTE 1. FRC and FR (Fast Rack Series) use comparable "C" line listing.
NOTE 2. C models with serial no. 85-1041605 or greater use Opti-Rinse

All sizing shown are that of the dishmachine manufacturers. Hubbell is not responsible for incorrect sizing applications.
For outdated models or dishmachines not listed consult Hubbell for recommended tankless booster size.
This selector chart is based upon 40°F and 70°F temperature rises, and 20psi flow.
All booster heaters are rated at 100% of the capacity of the dishwasher as recommended by the National Sanitation Foundation.

Optional Equipment

  • Inlet and Outlet Valve assemblies simplify installation by integrating unions, shut offs, drain ports and pressure relief valve
  • Water Treatment System: Provide superior mineral scale prevention and corrosion control by feeding a special blend of scale control compounds into the hot water stream before the booster. The in-line system includes a clear cartridge housing to allow an operator to view the cartridge and determine when it needs replacement without the need to open the system.
  • Shock Absorber: Reduce the harmful pressures resulting from quick closing dishwasher solenoid valves by installing a shock absorber between the booster and the dishwasher.
  • T&P Relief Valve for installation in the hot water outlet piping. (May be required by local code)
  • Remote Control Display allows heater to be installed in a remote location. The 3" x 5" NEMA 4 display enclosure can be located up to 250' from the heater and gives the operator full remote control and monitoring capabilities

Please note: optional equipment may impact overall dimensions and weight. Please request submittal drawing from factory.

Model Number Designation JTX

Step 1
Base Model

JTX = 8 GPM Max
JHX = 40 GPM Max
Step 2
KW Rating:
008 thru 054 KW
Step 3
Number of Heating Elements:

Step 4
RS = 208-1-60
R = 208-3-60
S = 240-1-60
T = 240-3-60
T3 = 380-3-50/60
T7 = 415-3-50/60
T5 = 440-3-60
T4 = 480-3-60
T6 = 600-3-60



A Hubbell tankless electric booster heater rated at 24 KW to provide 246 GPH at a 40°F rise and powered with 480 volt, three phase, 60 Hz.

Search FAQs

Model JTX Specific Questions

How small is the Hubbell electric tankless water heater?

About the size of an average briefcase. The Hubbell tankless water heaters are a fraction of the size of a conventional storage tank type water heater and they mount on the wall, so you can reclaim 100% of the floor space once occupied by your conventional water heater.

Does the Hubbell electric tankless water heater restrict water flow?

No. Hubbell electric tankless water heaters do not restrict water flow. Other brands may incorporate a flow restrictor device within their tankless heater or require a flow restricting device be installed in the plumbing or fixture itself as a method for controlling temperature. This is not the case for Hubbell electric tankless water heaters.

How is a tankless heater different from a storage tank heater?

A storage tank water heater maintains a tank full of hot water 24/7/365 and will heat water even during periods of no usage in order to make up for standby heat loss. A tankless water heater only consumes power (whether its gas or electric) when there is demand for hot water. They take up significantly less space and typically can be located close to the point of use, thus providing more efficient delivery of hot water. Tankless water heaters provide continuous hot water and never run out as long as the heater capacity is not exceeded.

How does my water heater ship?

All Hubbell storage type water heaters ship via common carrier and are classified by the Commodity Classification Standards Board under National Motor Freight Classification (NMFC) class 100. Each water heater is palletized and wood crated. All Hubbell tankless water heaters, when transported using common carrier, ship class 77.5. To provide the lowest transportation cost, in most cases the shipment is made on Hubbell’s account and the freight cost is added to the invoice, commonly referred to as “Pre pay and add”. For very large shipments, the most economical method (LTL or Dedicated Truck) for transporting the water heaters to the final destination will be analyzed by Hubbell's transportation department.

What is the purpose of a hot water booster heater?

The primary function of a booster heater is to provide 180°F (82°C) hot water for the final sanitizing rinse in a commercial dishwasher.

General Questions

Where can I purchase a Hubbell water heater?

There are numerous ways to purchase a Hubbell water heater depending upon the model you desire and your geographic location. The easiest way is to contact Hubbell directly at 800-647-3165 and ask for the sales department where you will be directed to either our local representative or our order entry department for quick and easy ordering.

Where can I purchase replacement parts?

Parts are available for your Hubbell water heater direct from the factory. Please call 800-647-3165 and ask for our parts department. Please have your model and serial number handy.

I don't see the size or feature I need, what do I do?

Hubbell has more than 35 product families available in over 4,000,000 configurations. There are numerous features, configurations and ratings we provide but for practical reasons are are not listed in the sales brochure. If you have a specific requirement and you do not see it in the brochure, please contact a Hubbell Sales Engineer...chances are we have what you need.

What should I know about Legionella disease?

Legionella is the bacteria responsible for Legionnaire’s Disease, an acute bacterial infection of the lower respiratory tract. This bacterium was first identified in 1977 by the Centers for Disease Control as the cause of an outbreak of pneumonia that caused 34 deaths at a 1976 American Legion Convention in Philadelphia. Pontiac Fever is a less severe, non-pneumonia, flu-like disease that is associated with and likely caused by Legionella bacteria. Legionella is a fairly common water bacterium and has been found to exist widely in many surface water sources including lakes, rivers, streams and ponds. It can also be found in ground water sources and some soils. At the levels found in these naturally occurring sources it typically does not pose a threat to public health. When the bacterium enters a domestic water system it can find an ideal host environment of warm water temperatures (105-115°F), stagnant water areas (isolated storage tanks and dead-end piping legs) and ample food sources (sediment, scale, deposits and biofilm). Under these conditions Legionella can rapidly colonize, forming higher concentrations that can pose the public health threat of Legionnaire’s Disease. There are many methods of controlling colonization of Legionella bacteria. However, a widely accepted and preferred method is to maintain the hot water system storage temperature continually at or above 140°F. Unfortunately, the elevated temperature necessary to minimize the growth of and kill Legionella bacteria has the potential to cause serious thermal shock and scalding injuries. As such, many plumbing engineers will specify that the water heater be set to maintain water temperatures at 140°F or higher to reduce the risk of Legionella, but then specify the appropriate mixing valve to ensure safe delivery of hot water to the fixtures. For a more thorough discussion of Legionella please go to here and the following link to the US Department of Labor OSHA information regarding Legionnaires’ Disease OSHA here

My question is not found in these FAQ’s, where do I look next?

Check out the Hubbell Product Center at Here for a complete listing of all technical documentation available by model. Get easy access to Installation, Operation & Maintenance manuals, Sales Brochures, Service Bulletins, Wiring Schematics, Parts Breakdowns and various other technical documents related to the full line of Hubbell water heaters. Or, if you prefer, please call us at 800-647-3165 and ask to speak to a Sales Engineer.


Many of our products literature is available online for download. To open these files, a PDF viewer is required. If you do not have one, Adobe provides Acrobat Reader free of charge for viewing only. Use this link to download Acrobat Reader. You may also choose to download the file to your PC for future reference or printing. On most operating systems, simply right-click on the links below, choose "Save target as..." or "Save link as...", choose a location and it will save the document to your computer for future reference.

Model JTX Specific Questions

Where can I purchase replacement parts?

Parts are available for your Hubbell water heater direct from the factory. Please call 800-647-3165 and ask for our parts department. Please have your model and serial number handy.

For Further Assistance Please Contact a Hubbell Tech Support Rep.

Tech Support Email

Hubbell Heaters
45 Seymour Street
P.O. Box 288
Stratford, CT 06615-0288
Tel: 203-378-2659
Fax: 203-378-3593
Product Center
Hubbell Binder

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