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Atmor AT90003

AT900-03 Point-of-Use Tankless Electric Instant Water Heater, 3 kW / 110V
★★★★★ ★★★★★

AT900-03 Point-of-Use Tankless Electric Instant Water Heater, 3 kW / 110V


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Quick Specs: View More

  • Width: 11.82"
  • Height: 7.29"
  • Depth: 3.55"

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The Atmor Tankless Electric Instant Water Heater is the eco-friendly, efficient and convenient solution you have been looking for – delivering to you an endless supply of hot water instantaneously at the point of use only when you need it. It is suitable for residential and commercial applications, and even in your RV. Rest your mind at ease and enjoy the continuous flow of hot water whenever you want. This compact device can be installed against the wall either under the sink out of sight or near the point of use; where its elegant design blends well into your home environment among other appliances. Available at AppliancesConnection


Handwash / kitchen appliance
Designed for spots where mild water heat is desired
Hidden installation

4 temperature level
Varies according to season and flow intensity.

Electric cable included
Electric cable included + connecting plug to standard power socket (no need to connect to main switch board)

Basic electric requirements
For 5kW unit- single phase 40 Amper electric board
For 7kW unit- dual phase 2*25 Amper electric board

Hot water supply
Instantaneous unlimited hot water supply
The unit supplies instant unlimited hot water until unit is turned off

Up to 80% energy saving
Energy is activated only at shower duration and unnecessary water are not heated

Water saving
Instant hot water upon demand!!!!
No water is spent while waiting for hot water to arrive from electric boiler

Saving device for maximum efficiency  included
A device connecting to outlet designed to increase heater efficiency is included

Additional Features:

  • Electronically controlled instant electric water heater for supplying single or multiple outlets
  • The most energy efficient way of heating water with electricity
  • Highly efficient tubular heating element
  • No energy waste since no water is stored
  • Automatically activated only when hot water faucet is turned on
  • Compact and easily concealed
  • Green & eco-friendly
  • UL Certified


Model: 900
Power rating: 3.5kW
Amps: 27A
Power supply: 1/2/3-N-PE-220VAC
(Hot water (L/min) Maximum at Δt=25°c: 2L/min(3.5Kw)/ 6.9L/min(12Kw)
Rated pressure: 0.3-7 bar
Element type: Tubular element
Temperature setting range: 30-55°c
Width: 11.82"
Depth: 3.55"
Height: 7.29"
Master carton quantity: 10
Water connections: ½” BSP
Protection class: IP24
Volts: 110 Volts
Wall Mountable: Yes
Watts: 3000W
  • NOT A PLUG-IN UNIT. - Requires 10 AWG wire, 110V connection and a 30A dedicated breaker
  • Ideal for Sink applications in moderate to warm climates (See Sizing Guide)
  • Not a Plug in unit - Requires 10 AWG wire, 110V connection and a 30A dedicated breaker
  • Safety Certifications: UL Listed

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Overall Rating ☆☆☆☆☆ ★★★★★ 5.0
Ease of Use 5.0
Meet Expectations 5.0
Bang for Your Buck 5.0
Average rating out of 1 reviews

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Customer Reviews

 from Sylacauga, AL
Overall Rating: ☆☆☆☆☆ ★★★★★ 5
Ease of Use: 5
Meet Expectations: 5
Bang for Your Buck: 5

Recommended Product:

This product meet my expectation to the letter from it`s ease of installation to it`s ease of use I would recommend this product to anyone who is looking for a quick access to hot water.

Pros: It was easy to connect the power to this unit and water connection was and ease.

Cons: I found no cons with this product

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  • Brand:Atmor
  • SKU:AT90003
  • Stock Id:384853
  • Product Number:AT90003


  • Fuel Type:Electric
  • Capacity (Gallons):0.11
  • Tankless:Yes
  • Gallons Per Minute:0.5


  • Width:11.82"
  • Depth:3.55"
  • Height:7.29"

    Technical Details

  • Voltage:110 Volts
  • Watts:3000W
  • Amps:27A
  • Wall Mountable:Yes
  • Model:900
  • Power Rating:3.5kW
  • Power Supply:1/2/3-N-PE-220VAC
  • Usage:Residential
  • Element Type:Tubular element
  • Rated pressure:0.3-7 bar
  • Temperature setting range:30-55c
  • Master carton quantity:10
  • Water Connections:BSP
  • Protection class:IP24
  • (Hot water (L/min) Maximum at t=25c:2L/min(3.5Kw)/ 6.9L/min(12Kw
  • Weight:4.60 lbs