We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Compact white box electric tankless water heater, 6.25 by 9.63 by 2.75 inches, front label and pipe fittings visible

Chronomite

Chronomite SR-30/277 HTR-I 277VAC 30A Electric Tankless Water Heater

SKU CH-MRGE-GBMDV

Delivers 0.65 to 2 gpm of 140 to 160 °F water from a 277 V, 30 A, 8310 W indoor unit measuring 6.25 by 9.63 by 2.75 in

  • TypeOther
  • Instant hot water without a storage tank
  • Activates at just 0.65 gpm flow rate
  • Delivers up to 2 gpm at 160 °F
  • Compact 6.25 × 9.63 × 2.75 in fits tight spaces
  • Runs on 277 V single-phase at 30 A

Electric tankless heater for 277 V single-phase

This Chronomite unit delivers instantaneous hot water at up to 2 gallons per minute from a 277 V AC single-phase circuit. It draws 30 amps and 8,310 watts, producing outlet temperatures between 140 °F and 160 °F. The compact indoor housing suits commercial and residential points of use where a traditional tank is impractical.

Verify 277 V service and 30 A circuit before

Your electrical panel must provide a dedicated 277 V single-phase branch circuit protected by a 30 A breaker. The cold-water inlet requires a 3/8 in connection and the flow switch activates at 0.65 gpm, so supply plumbing must meet that minimum. The thermostat is not adjustable, so the factory temperature range is fixed.

No accessories alter the fixed temperature

The heater ships as a standalone appliance without an adjustable thermostat, remote control or mixing valve. Because the output range is preset, installers cannot change the 140–160 °F limits or the 0.65 gpm activation threshold through add-on parts.

Highlights

  • Instant hot water without a storage tank
  • Activates at just 0.65 gpm flow rate
  • Delivers up to 2 gpm at 160 °F
  • Compact 6.25 × 9.63 × 2.75 in fits tight spaces
  • Runs on 277 V single-phase at 30 A

Specifications

BrandCHRONOMITE LABS
TypeOther

Questions about this item

What comes in the box with the SR-30/277 HTR-I and what must be purchased separately?

The unit is supplied as the electric tankless water heater itself. Supply piping, compression fittings for the 3/8 in cold inlet, a 277 V AC single-phase circuit rated for 30 A, and mounting hardware are not included and must be sourced separately.

Which version of the SR-30/277 HTR-I should I choose for a commercial hand-washing station?

Only one configuration is offered: 277 V AC single-phase, 30 A, fixed output between 140 °F and 160 °F with no adjustable thermostat. Select it when the electrical supply matches 277 V and the required flow is within 0.65–2 gpm.

What does the 2 gpm maximum flow rate mean when the heater is installed in a real system?

At 2 gpm the heater delivers its full 8 310 W output, raising inlet water to a temperature between 140 °F and 160 °F. If demand exceeds 2 gpm the temperature will drop below that range; below 0.65 gpm the unit will not activate.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.