Chronomite CM-40L/208 Instant-Flow® Tankless Water Heater
High-Output Tankless Hot Water Solution for Commercial Point-of-Use Needs
The Chronomite CM-40L/208 is the most powerful 208V model in the Instant-Flow® CM series, designed for commercial and industrial settings requiring high temperature rise at low flow rates. With 8,320 watts of heating capacity, this compact yet robust unit delivers rapid, consistent hot water on demand—perfect for applications in colder climates, healthcare, manufacturing, or high-traffic public restrooms.
Performance Benefits
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Feature
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Specification
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Benefit
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Power Rating
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40 Amps, 208 Volts, 8,320 Watts
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✓ Maximum heating performance for cold incoming water
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Temperature Rise
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~150°F at 0.40 GPM (approximate)
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✓ Delivers true hot water even in extreme cold-water conditions
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Activation Flow Rate
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0.20 GPM
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✓ Works with low-flow, water-saving fixtures
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Size
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6-1/4" (H) x 9-5/8" (W) x 2-3/4" (D)
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✓ Space-saving design fits neatly under sinks or counters
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How It Works: Instant Heating Technology
Stage 1: Flow Activation
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Function: Activates automatically when water flow reaches 0.20 GPM
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Benefit: No energy consumed in standby—operates only when water is flowing
Stage 2: Precision Heating
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Function: Nichrome coil elements rapidly heat water in a Celcon plastic flow-through heating chamber
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Benefit: Immediate, stable hot water with no storage tank required
Key Features
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Rugged Cast Aluminum Housing: Resists corrosion and vandalism in high-use environments
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Unlimited Hot Water Supply: On-demand, continuous hot water—never run out
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Ultra-Efficient: 99% energy efficient—only heats water when needed
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Compact Design: Fits in tight spaces for convenient installation at point-of-use
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Eco-Friendly: Saves water and electricity; supports green building goals
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No Pressure Relief Valve Required: Simplifies installation (verify with local plumbing code)
Compared to Traditional Tank Heaters
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Feature
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CM40L/208 Tankless Heater
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Traditional Tank Heater
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Energy Efficiency
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99% – Heats only when water flows
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Constant standby energy waste
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Size
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Compact (6-1/4" x 9-5/8" x 2-3/4")
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Requires large floor or wall space
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Hot Water Supply
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Unlimited
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Limited to tank capacity and long recovery times
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Maintenance
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Minimal upkeep
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Regular flushing and descaling required
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Lifespan
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Long-lasting
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Shorter due to corrosion and sediment buildup
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Certifications & Compliance
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UL Listed: UL 499 certified for electrical safety
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CSA Certified: Complies with CAN/CSA C22.2 No. 88
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UPC / IAPMO Approved: Fully approved for plumbing code compliance
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ADA Compliant: Meets requirements for public and accessible installations
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Lead-Free Compliant: Conforms to U.S. Federal Public Law 111-380
What’s Included
- 1 × Chronomite CM40L/208 Instant-Flow® Tankless Water Heater
- 3/8" Compression Fittings (inlet & outlet)
- Faucet Flow Control Adapters
- Installation and Operation Manual
Ships with standard (ADJ) option. To request a preset factory temperature at 104°, 110° or 120°F, please email us immediately after placing your order.
Installation:
A licensed plumber is required for installation per your local regulatory requirements.
Before beginning, turn off the breaker and disconnect the electrical supply to the area.
Shut off the water supply to the fixture.
Double‑check that everything has been turned off prior to proceeding.
For optimal performance, Chronomite electric tankless water heaters should always be installed within 18 inches of the point of use.
Maintenance:
Periodically inspect the supply lines, connections, and heater for any moisture, corrosion, or other preventable problems.
