Generic Tankless Water Heater Electric, Instant Hot Water Heater Under Sink, 3000W 110V On Demand Mini Water Heater for RV Kitchen Bathroom, White

I don't know why never explain how their devices work, but here it is. The operation is pretty simple. You set the temperature by regulating the flow of water. The device has various protections, but it always operates at maximum power, so to increase the temperature you need to reduce the flow. Keep it away from water or steam as the electronics inside are not waterproofed whatsoever.

Requires a dedicated outlet to prevent breaker from tripping, running for more than a few minutes can sometimes trip the dedicated breaker as well. Purchased in February, finally got in installed by mid June. It just stopped working in November. To get the water more than just warm water flow has to be low, barely enough to wash your hands. Used in work shop and was able to get the pressure where it worked for me. While it was working I gave it a 3 or 4, but since it worked barely 6 months it gets the one star it deserves

This heater takes up a very small footprint. It does a good job of quickly heating the water within a few seconds. However, you need to know a few things before ordering it. Per the item description, it works best with a limited flow faucet. The water gets quite hot with a 0.5CFM faucet, just barely warm enough for a shower with a 1.0CFM faucet, and does a good job of taking off the chill with a 1.5CFM faucet. Its rated at 3000watts (25Amps) of electrical power. My home is fairly new construction and has a 20Amp circuit breaker for the bathroom. The heater drew 2600Watts (22Amps) for 30 seconds and then the circuit breaker popped. You will need a 25-30Amp breaker to power this heater.

What most people have said about this unit is mostly correct. While the price is right, the functionality is hit n miss. Granted, we have stupid cold water since we use a cistern. That being said… The flow of water is what controls the heat level. If the flow slows by just a little, the temp spikes; if flow get stronger, it goes back to freezing. It resets eventually, but the extra power required usually pops the 20amp breaker. It does suggest a 30amp but we figured it’s the only thing on there, how much could it possibly draw? A lot!! I highly recommend at LEAST a 30amp, and probably have it be the only thing attached to it, except maybe phone chargers or something innocuous like that. As far as size/design, it fits under the sink and is fairly compact and simple to install. The display seems accurate when showing current temp. It does take +/- a minute to come online once you start the water. Probably due to temps. We’re using this as a temporary solution since the water system is not yet fully installed (still finishing the house). I guess for the price and the simplicity of install it’s worth it. Just make sure you read all the reviews and make your decision accordingly. Good luck!

Works great! Has no issues and heats up the water fast

Sometimes it's actually nice to get an item for purchase that actually performs the job you paid for. This is not one of those items. Does not get the water hot period.

I was skeptical after reading the reviews. Here is my experience after installing it. After installing it and assuring there was no air in it, I plugged it in. Immediately, the display started a rotating circle of blue light. I tried pushing the on off button but nothing happened. Then I tried running the hot water. The rotation stopped and it displayed the temperature and heated up very quickly. Please note that I am using it on a line that is hooked up to my main water heater. The water got up to 130 degrees. I assume that must be its limit. I have my main hot water heater set at 120 so it heated up above it. It seems to only get that hot after running a couple of minutes. I am finding now, that when I first turn on the hot water, it gets warm and then gradually heats up, until the water from my hot water heater hits it, then it goes to 130. My wife loves it. Before installing it, she had to run the water for several minutes to get hot water!

I was truly surprised with this product. It was easy to install and worked perfect for my small space.