Chronomite CM-40L/277 Instant-Flow® Tankless Water Heater
Maximum Output. Instant Hot Water. Built for Demanding 277V Commercial Applications.
The Chronomite CM-40L/277 is the highest-capacity model in the 277V Instant-Flow® CM Series, delivering powerful on-demand hot water with 8,878 watts of heating output. Designed for use in commercial and industrial environments where hot water demand is high and space is limited, this tankless heater provides fast, efficient, and unlimited hot water at the point of use. Perfect for public restrooms, hospitals, manufacturing facilities, and institutional sinks.
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, 277 Volts, 8,878 Watts
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✓ Maximum power for high-demand or cold water environments
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Temperature Rise
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~157°F at 0.40 GPM (approximate)
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✓ Suitable for colder climates or higher-temp wash stations
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Activation Flow Rate
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0.20 GPM
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✓ Supports ultra-low flow fixtures and sensor faucets
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Size
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6-1/4" (H) × 9-5/8" (W) × 2-3/4" (D)
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✓ Space-saving design for under-sink or tight installations
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How It Works: Instant Heating Technology
Stage 1: Flow Activation
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Function: Activates instantly at 0.20 GPM
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Benefit: No standby energy waste—only draws power when water is flowing
Stage 2: Precision Heating
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Function: Nichrome coils heat water on contact inside a Celcon polymer chamber
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Benefit: Provides consistent hot water instantly with no storage tank or wait time
Key Features
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Rugged Cast Aluminum Housing: Corrosion- and vandal-resistant—ideal for commercial and institutional settings
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Unlimited Hot Water: No tank, no wait—delivers continuous hot water on demand
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99% Energy Efficiency: Heats only as needed, minimizing power consumption
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Compact Installation: Easily mounts under sinks, inside cabinets, or behind walls
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Green Building Ready: Supports LEED credits and reduces water/energy waste
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No Pressure Relief Valve Required: Simplifies setup (check local code)
Compared to Traditional Tank Heaters
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Feature
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CM40L/277 Tankless Heater
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Traditional Tank Heater
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Energy Use
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99% efficient—heats only on demand
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Continuous energy use to maintain tank temp
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Hot Water Supply
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Unlimited
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Limited by tank size and recovery time
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Installation Size
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Compact: 6-1/4" x 9-5/8" x 2-3/4"
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Bulky, often requires floor space
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Maintenance
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Minimal
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Requires frequent descaling, flushing
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Service Life
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Long—no corrosion-prone tank
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Shorter due to internal corrosion and sediment buildup
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Certifications & Compliance
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✅ UL Listed – Conforms to UL 499 standards for electrical safety
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✅ CSA Certified – Meets CAN/CSA C22.2 No. 88
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✅ UPC / IAPMO Approved – Code-compliant for plumbing installations
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✅ ADA Compliant – Suitable for accessible and public-use spaces
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✅ Lead-Free Certified – Complies with U.S. Public Law 111-380 for safe plumbing
What’s Included
- 1 × Chronomite CM40L/277 Instant-Flow® Tankless Water Heater
- 3/8" Compression Fittings (Inlet & Outlet)
- Faucet Flow Control Adapters
- Installation & 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.
