Instant-Flow® Micro Booster Water Heater
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Instant-Flow® Micro Booster Water Heater

Model Number:  M-40/240-ADJ-NP
This microprocessor-controlled tankless water heater operates at 9,600 watts, can increase an existing tank-style heater by up to 50%. 

The Instant-Flow® Micro booster water heater features a factory preset temperature using digital microprocessor technology. This instant water heater responds to fluctuations in incoming water temperature, pressure, and flow rate regulating the water temp over 100 times per second. This eliminates the concern of scalding as well as the need for mixing valves. It offers the same compact size, easy installation, and unlimited hot water as heaters without microprocessors, while offering up to 50% more energy efficiency. The Instant-Flow® Micro is great for lavatories, sinks, and numerous other special applications.
Product Function:
  • Booster Compatible
  • Factory Preset Temperature
  • 99% Energy Efficient
  • Compact Size
  • Easy to Install
  • Low Installation Cost
  • Unlimited Hot Water
  • Meets ADA Requirements
  • Made in the USA
  • Optional Stainless Steel Housing
Features and Benefits:
  • Uses a digital microprocessor for temperature control Ultra quick response times for temperature variations -120 times per second Microprocessor use is the most energy efficient means of heating water
  • Unlimited hot water
  • Ideal for sensor /hands-free faucets
  • Saves water and energy - 99% energy efficient
  • Meet all CAL GREEN low flow requirements
  • Vandal resistant rugged cast aluminum housing
  • Space saving compact size: 6-1/4" (H) x 9-5/8" x 2-3/4"
  • Meets applicable building codes including:
  • Environmentally friendly
  • Made in the U.S.A.
Product includes
  • Installed with a traditional tank heater, can increase hot water capacity 50%
  • Includes: Temperature Adjust Knob (option -ADJ) and High Flow 3/4" Male NPT Connections (Option -NPT12)

Regularly Furnished:
Heater operating with theses specifications
  • Activation Flow Rate: 0.65 Gallon (2.50 Liter) per Minute
  • Amps: 40
  • Volts: 240
  • Watts: 9,600
  • Temp Rise at the following flow rates
    • 66° F at 1 GPM
    • 44° F at 1.5 GPM 
    • 33° F at 2 GPM
    • 34° C at 4 LPM
    • 23° C at 6 LPM
    • 17° C at 8 LPM
This heater include Temperature Adjust Knob and High Flow 3/4 inch Male NPT Connection

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NameDescriptionFile Size
Submittal Standard Activation, Instant-Flow® Micro Water Heater (pdf)Standard Activation, Instant-Flow Micro Heater including M-30/208, M-30/240, M-30/277, M-40/208, M-40/240, M-40/2771274 KBDownload
NameDescriptionFile Size
Manual Standard Activation Instant-Flow Micro Heater (pdf)Standard Activation Instant-Flow Micro Heater M-30/208, M-30/240, M-30/277, M-40/208, M-40/240, M-40/277, M-50/240788 KBView


  • Satin Finish Stainless Steel Housing (-SS)
  • High Polish Finish Stainless Steel (-SSP)
  • PA 765 ABS Plastic Housing (-P)
  • 2095-1 Disconnect Switch


  • Booster Heaters

Data Sheets

Chronomite Booster Heaters Flyer and Installation Sheet (pdf)Chronomite Booster Heaters Flyer and Installation Sheet (pdf)View