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3500-Watt/120V 0.5 GPM Point-of-Use Electric Tankless Water Heater Includes Pressure Relief Device 1-Sink Water Heater

$11599
$144.99 Save $29.00 (20%)
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  • Continuous on demand Point-of-Use tankless hot water heater
  • 30 Amp Single Pole Breaker, 10/3 AWG Wire; NOT A PLUG-IN UNIT
  • Saves up to 50% on water heating costs vs. a tank water heater
  • See More Details
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Product Overview

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 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.
  • Durable, point-of-use hot water solution ideal for a single sink application in areas with at least 57°F ground water temperature
  • Requires 30 Amp single pole dedicated breaker and a 120-Volt connection
  • Standard 1/2 in. NPT (straight thread) water connections
  • On-demand water heating saves up to 50% on water heating costs
  • Easy to install and maintain - (professional installation recommended)
  • UL certified and lead free
  • Inner workings (i.e. canister) of this ATMOR unit are primarily constructed with a commercial grade, heavy duty, heat-resistant polymer composition reinforced with a fiber glass compound to complement its durability, stiffness, finish and strength such thermoplastic materials are increasingly used across the automotive, consumer industrial, medical and energy markets, to enhance product performance and increase consumer safety
  • Reference our temperature rise/flow rate chart to confirm if this is the right tankless water heater for your need
  • Superior warranty - 2-year limited parts only, 7-years free from leakage
  • Includes pressure relief device (PRD) with built-in one-way valve for added value and safety
  • Use our buying guide to choose the right tankless water heater for your needs
  • ATMOR is a reliable, global leader in tankless electric water heating, with over 50 years of experience and currently sold in over 50 markets worldwide
  • Before purchasing, please confirm that you have the required electrical requirements available on your breaker panel
  • Ideal for commercial or residential use
  • Inner workings (i.e. canister) of this ATMOR unit is primarily constructed with a commercial grade, heavy duty, heat-resistant polymer composition reinforced with a fiber glass compound to complement its durability, stiffness, finish and strength, such thermoplastic materials are increasingly used across the automotive, consumer industrial, medical and energy markets, to enhance product performance and increase consumer safety
  • Note: unit must be professionally installed into electrical supply, reference our guide to confirm if this is the right tankless water heater for your area/needs



  • Use our buying guide to choose the right tankless water heater for your needs

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Info & Guides

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3500-Watt/120V 0.5 GPM Point-of-Use Electric Tankless Water Heater Includes Pressure Relief Device 1-Sink Water Heater

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BrandATMORATMORIHeatRheem
Name3500-Watt/120V 0.5 GPM Point-of-Use Electric Tankless Water Heater Includes Pressure Relief Device 1-Sink Water Heater13,000 Watt/240-Volt 2.25 GPM Electric Tankless Water Heater Includes Pressure Relief Device, Ideal for a Full Bathroom9 kW Real-Time Modulating 2 GPM Electric Tankless Water HeaterPerformance 8 kW Self-Modulating 1.55 GPM Tankless Electric Water Heater
Price
$11599
$144.99
Save $29.00 (20%)
$15199
$189.99
Save $38.00 (20%)
$18100
$25000
Ratings
(425)
(425)
(94)
(1339)
Flow Rate @ 45 F Rise (gallons/min)0.53 gal (US)/min2.251.00 gal (US)/min
Application TypeResidentialResidentialResidentialResidential
Wattage (watts)35001300090008000
Number of Showers1-21-21-21-2
Indoor/OutdoorIndoor,OutdoorIndoor,OutdoorIndoor,OutdoorIndoor
Water Heater FeaturesOverheat Protection,Wall MountedOverheat Protection,Wall MountedOverheat Protection,Wall MountedWall Mounted
Fuel TypeElectricElectricElectricElectric
Efficiency Level Super HighSuper High
Flow Rate @ 45°F Rise (gallons/min) 1.21
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Specifications

Dimensions

Product Depth (in.)
4.13 in
Product Height (in.)
7.13 in
Product Width (in.)
11.96 in
Water Connection Size (in.)
0.5

Details

Amperage (amps)
27
Application Type
Residential
Commercial/Residential
Residential
Electricity Phase
Single Phase
Finish Family
White
Flow Rate @ 35°F Rise (gallons/min)
0.68 gal (US)/min
Flow Rate @ 45°F Rise (gallons/min)
0.53 gal (US)/min
Flow Rate @ 55°F Rise (gallons/min)
0.43
Flow Rate @ 65°F Rise (gallons/min)
0.33
Fuel Type
Electric
Heat Exchanger Warranty
2 Year
Indoor/Outdoor
Indoor,Outdoor
Maximum Temperature (F)
130
Minimum Activation Rate (gpm)
0.5
Minimum Temperature (F)
65
Number of Elements
1
Number of Showers
1-2
Pack Size
1
Product Weight (lb.)
4.41 lb
Required Volt Connection
120 volt
Returnable
90-Day
Uniform Energy Factor
0.00
Water Heater Features
Overheat Protection,Wall Mounted
Wattage (watts)
3500

Warranty / Certifications

Certifications and Listings
UL Listed
Labor Warranty
No Warranty
Part Warranty
2 Year

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 3.8
    out of 430 reviews
  • 75% recommend this product
Filter by:
Showing 1-10 of 430 reviews
The Atmor Electric Tankless Water Heater is efficient and compact! Fits perfectly under a sink, u...
The Atmor Electric Tankless Water Heater is efficient and compact! Fits perfectly under a sink, utility room, closet, wherever. Works great for a bathroom that is on the other end of a house or far from the hot water tank. This water heater works inline with your current plumbing and is activate when water flow is detected. This gives you instant hot water until the hot water from your main tank reaches this location. Great size and affordable to run!
by Mark
  • Recommended Product
Just recently received this tankless water heater by ATMOR. It is a 13000 Watt and 240 volt heate...
Just recently received this tankless water heater by ATMOR. It is a 13000 Watt and 240 volt heater which includes a pressure relief valve The Continuous Flow of hot water activates with water flow and unlike gas water heaters you can install this just about anywhere as it requires no venting. It does however require a 60 amp double pole dedicated breaker and a 240-volt connection. Also required are standard half inch straight thread water connectors. This water heater can also be installed indoors or out. It has four settings, off, low, medium and high. The hardest part is going to be drilling through your house and adding the number 10 wire from the fuse box to the heater. The great part is going to be not having to waste water while waiting for actual hot water to come out of your faucet! Fortunately my partner is in construction and can do all of the plumbing , drilling and wiring. You may have to hire someone to do all that for you. Overall, it's a yes from me.
by housebeautifier
  • Recommended Product
The Atmore under sink hot water heater is a cinch to install under the sink, it gives me hot wate...
The Atmore under sink hot water heater is a cinch to install under the sink, it gives me hot water as quick as I open the hot water handle. I use to wait a whole minute to get good hot water and now it is as fast as turning the handle. No more wasted water while waiting for it to warm up. The installation is very simple and the instructions are very clear to give you the do's and do not's for connecting it. The hardest part is running the #10 wire from the fuse box through the wall and under the counter.
by ROBERT
  • Recommended Product
This is a very compact little water heater like you would find mounted under a sink. Construction...
This is a very compact little water heater like you would find mounted under a sink. Construction quality is good with almost all plastic components. No assembly required other than attaching the included pressure relief device. Pressure rating is adequate for any normal residential water service. Water flow for rated heating performance is low but is estimated adequate for a low volume shower. This device would be great for a half bath or a utility sink or single shower stall in a remote location like a garage which is where I will use mine. Water side hookup is easy with only two screwed fittings. Electrical requires 240V service.
by HomeDepotCustomer
  • Recommended Product
1 person found this helpful
This well-designed and compact water heater is 12 inches wide, 7 inches high and 4 inches deep. A...
This well-designed and compact water heater is 12 inches wide, 7 inches high and 4 inches deep. At the bottom are two 3/4 inch threaded connections - blue one for cold inlet and a red one for the hot outlet. My new sink with dispenser has not yet arrived so the output result cannot be evaluated at this time. The front panel dial gives you four choices - Off, Low, Medium and High.
by Juka
  • Recommended Product
The ATMOR 13,000 Watt/240-Volt 2.25 GPM Electric Tankless Water Heater Includes Pressure Relief D...
The ATMOR 13,000 Watt/240-Volt 2.25 GPM Electric Tankless Water Heater Includes Pressure Relief Device, Ideal for a Full Bathroom appears to be exactly what it is titled it you look at the front side of the box only. Either your bathroom needs to already have multiple specifications before installing this unit, or you'll need an electrician to complete all of the necessary adjustments so that this will work (it needs its own outlet, must be at least 240v, and if that isn't already in your bathroom, you'll also have to make changes to your circuit breaker so that the newly installed outlet can handle it).
by whitney529
Armor 13,000 Watt 2.26 GPM Electric Tankless Water Heater, that includes a pressure relief device...
Armor 13,000 Watt 2.26 GPM Electric Tankless Water Heater, that includes a pressure relief device, and is ideal for a full bathroom, was highly recommended to us by a professional, for use in our finished basement. Not installed yet, so I’m relying on expert advice to write this review. The install is quite simple and straightforward, instructions included. The unit carries a 2 year warranty, and 7 year warranty against leaks. No more paying to heat water that you’re not using, as this unit heats water on demand. This will save on utility bills quite nicely! Others, who have this unit, have reported to us no issues and are happy with the tankless heater. So we expect the same results.
by steveco52
  • Recommended Product
The most important thing is to read the instructions before you purchase. If your hooking up to ...
The most important thing is to read the instructions before you purchase. If your hooking up to very cold well water your going to be disappointed! We are in Florida and have well water but our water is not extremely cold like you would find in northern states. I wanted this for my garage sink. I don’t use the hot water long but like to wash my dirty hands in the garage and leave any mess out there. I have ample hot water from this unit. I also clean various parts which require warm to hit water and this unit works great! I also clean and filet fish in the garage so hot water is a must for cleaning up! I needed minimal parts to complete my installation. I already had the wiring and circuit breaker in place when the unit arrived. Plumbing hookup was simple. Has three settings. I have been switching the setting and tried all three. Finally sticking with the middle setting as that seems to fit my needs. Warranty of 2 years on parts and 7 years on leaking is very good. Overall I am extremely happy with the unit!
by Richierich03
  • Recommended Product
Received the Atmor 13,000 watt 240 volt 2.25 gpm electric tankless water heater that includes a p...
Received the Atmor 13,000 watt 240 volt 2.25 gpm electric tankless water heater that includes a pressure relief device, but sad to say cant install as has now to hook up that meets National Electric Code requirements. For on has a metal ko connection plate to mount on a wall then you are to run a conduit to that plate and run bare wires to the electric water heater, but that needs to be in conduit and then it provides to holes in the back of heater to run wire thru, by code you can run wires exposed, so I will not install as only place to drill a KO is on the removable front cover and that will make it so you cant service the unit or reinstall the cover with the conduit installed
by FrankF
First, it works great. I had no issues with the installation or operation. Once it was plumbed an...
First, it works great. I had no issues with the installation or operation. Once it was plumbed and wired it was just a matter of setting the temp with the external control valve and turning on the water. If you look at the video you should be able to see the steam rising from the hot water. I guess I need to dial it back a bit, a little too hot. Unfortunately where I had to mount it didn't leave me enough space to photograph the steps along the way or the finished installation. I'm happy to have it mounted where it is but I had to become a contortionist to install it, My fault, not the heater's. They thing I didn't like is all of the plastic. It feels cheap and brittle. The pressure relief valve is completely plastic. Please go gently when installing this. The price is fantastic but you get what you pay for. In this case, I wish I had paid more to get a sturdier heater. It works great and where I have it is well protected from everything. Overall, it's cheap and brittle but it works fine
by MARK
  • Recommended Product
1 person found this helpful
Showing 1-10 of 430 reviews