Skip Content

Want to pay an invoice? Please call us at 1-800-GRAINGER (1-800-472-4643).


208VAC Undersink Electric Tankless Water Heater, 24,000 Watts, 67 Amps AC

  • Item# 21HT77
  • Mfr. Model# EX240T2T ML
  • Catalog Page# 3380
  • UNSPSC# 40101826
208VAC Undersink Electric Tankless Water Heater, 24,000 Watts, 67 Amps AC close
close x

Using 360° Viewing:

  1. Rotate: Use top-to-bottom, side-to-side by use of mouse arrow.
  2. Zoom In: Double click on image.
  3. Zoom Out/Reset: Put photo at full zoom & then double click.
Megaphone How can we improve our Product Images?

Price $1,881.00 / each

Activate Now

to save with

Select AdvantageSM

Please sign in or register to access lists

Please sign in or register to access Quote

Jump to:
  • Shipping Weight 15.55 lbs.
Country of Origin USA Country of Origin is subject to change.
Note: Product availability is real-time updated and adjusted continuously. The product will be reserved for you when you complete your order. More

Product Details

Compact water heater requires no venting, T&P valve, or drain. Unit only heats water when needed, helping to save water, conserve energy, and reduce operating costs. Low-lead NSF 372 Listed construction. Ideal for multilavatory fixtures, showers, and commercial wash applications.

View More

Technical Specs

  • Item Electric Tankless Water Heater
  • Water Heater Design Point-of-Use
  • Water Heater Application Undersink
  • Watts 24,000
  • Amps AC 67
  • Voltage 208VAC
  • Phase 3
  • Min. Flow Activation 0.30 gpm
  • Temp. Range 70 Degrees to 110 Degrees F
  • Water Connection 1/2" Compression
  • Temp. Rise @ 0.5 GPM 109 Degrees F
  • Temp. Rise @ 1.5 GPM 72.9 Degrees F
  • Temp. Rise @ 2.5 GPM 65.6 Degrees F
  • Temp. Rise @ 4.0 GPM 41 Degrees F
  • Residential / Commercial Commercial
  • Elements Triple Replaceable Nickel Chrome Cartridge Insert
  • Mounting Vertical
  • Pressure Range 25 to 150 psi
  • Max. Flow Rate 4 gpm
  • Wire Size 6 AWG
  • Height 12-1/4"
  • Width 15-1/4"
  • Depth 4-1/2"
  • Features Cut Energy Costs - Flow Switch Activates Heater Only on Demand, 99% Energy Efficient, Hot or Cold Water Feed, on Demand Hot Water - Never Run Out, Multi Lav Temperature Setting
  • Standards UL 499
Megaphone How can we improve our Technical Specifications?

Compliance and Restrictions

  • This product has been certified by a third party to be compliant with the “Safe Drinking Water Act” requirements for low lead in potable (human consumption - drinking and cooking) and non-potable water applications (non-human consumption).

  • This item has been restricted from sale in the following countries: Canada.

  • This item is restricted for international sale.

Customer Reviews

Product Reviews Disclaimer:
Grainger is neither responsible for, nor does it endorse, the content of any product review or statement posted. Any statements posted constitute the statements of the poster and are not the statements of Grainger. The statements posted by Grainger employees with the Grainger employee badge represent the views of such employees and are not the statements of Grainger. Grainger makes no representations as to the appropriateness, accuracy, completeness, correctness, currentness, suitability, or validity of any product review or statements posted, including those posted by employees with the Grainger employee badge, and is not liable for any losses, injuries or damages which may result from any such product review or statements. Use of any linked web site provided in a product review or post is at the user's own risk.