Atmor AT-800-35 3.5kW 120V 0.5GPM Single Sink Tankless Electric Water Heater


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The Atmor 800 series point-of-use tankless electric water heater is an eco-friendly, efficient and convenient solution that delivers a continuous supply of hot water instantly, without the wait and worry of running out. The advanced on-demand water heating technology will automatically turn on and off by sensing water flow, helping you to reduce water consumption, eliminate costly water waste, and save on energy costs.

The compact footprint of this water heater saves you space by simply installing it against the wall either under the sink out of sight or near the point of use, where its elegant design blends into your home environment among other appliances. Unlike a gas water heater, the compact design requires no venting, giving you the flexibility to install anywhere inside your home, office, garage, or even an RV.

Atmor also offers a great value with the assurance of the worry-free warranty–7 years leakage free and 2 years parts only. (IMPORTANT: inlet temps vary by location and seasonality. Selecting the right water heater depends on your incoming water temperature, flow rate, and desired output temperature. – See Performance Guide Images and/or Manual before purchasing.) Should you have any questions and need sizing this unit for your hot water need, give our technical support agents a call for further assistance at 1-888-783-6082, Monday – Friday, 9 AM-5:30 PM EST.

About Atmor

Atmor delivers more, providing millions around the world with the comfort and convenience of Endless Hot Water on Demand. Durability and dependability are the benefits of an Atmor Point-of-Use Tankless Electric Water Heater–where we spare no expense in constructing and reinforcing our units with top quality, non-corrosive, lead-free materials. Benefits that will grant you increased sustainability, long life expectancy, and substantial peace of mind warranty.

For over 50 years, ATMOR delivers innovation, peace of mind, and plenty energy-saving hot water. With Atmor your options are endless…and so too is your hot water.

  • For commercial or residential use
  • Single sink application in areas with at least 57°F ground water temperature
  • 45° F Temperature Rise @ 0.53 Gallons Per Minute (GPM) / 35° F Temperature Rise @ 0.68 Gallons Per Minute (GPM)
  • Standard 1/2 in. NPT (straight thread) water connections
  • Requires 30 Amp single-pole dedicated breaker, 120-Volt connection, 10/3 AWG wire with Ground
  • UL listed and lead-free
  • Easy to install and maintain – (professional installation recommended)
  • Includes Pressure Relief Device (PRD) with built-in one-way valve for added value and safety
  • Superior Warranty–2-year limited parts only, 7-years free from leakage
  • ATMOR is a reliable, global leader in tankless electric water heating
  • Over 50 years of experience and currently sold in over 50 markets worldwide
  • Reference our temperature rise/flow rate chart to confirm this is the right tankless water heater
  • Before purchasing, confirm you have required electrical requirements available on your breaker panel
Assembled Size
11.96″ x 4.13″ x 7.13″
Shipping Info
Standard – 4 to 10 business days
Ship Info
2 year parts only limited manufacturer warranty, 7 year leak-free warranty
Component country
Assembled country


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