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

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.

I ordered two of these hot water heaters in November for my food truck. I just installed them yesterday and tried them out the biggest waste of money I’ve ever spent absolutely does not even phase the temperature of the water.

Works great in my camp cabin

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!

Others have reviewed this product as not meeting the performance specs as advertised. Starts warm and gets colder every time. Could not stabilize the temperature even for a low flow outdoor shower. I installed a new electric panel for 30amps. Initially tripped the breaker but that seems to be intermittent. I will accept that you get what you pay for but wouldn't recommend.

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!

Works great for my barber shop instant hot water

Okay, so let’s immediately address what you might be wondering: No electrician is going to install this. A plumber might, but your breaker will always trip after a couple of minutes.If you are your own electrician/plumber and are thinking about getting this, you need to know the following:- This thing is 3500 watts, not 3000 as the listing and label claim. So, you absolutely need a dedicated 30 amp circuit minimum, though even that is too small for continuous use.- There is no way this thing is UL listed or approved. As you can see from the pictures, it comes with a 5-15 plug, which, best case, can only plug in to a 5-20 receptacle (as I have done - see pics). This is a big no-no.- The cord itself says it contains 14AWG conductors, which is alarming except for the fact that it also claims to have 105°C insulation (again, see photos). This claim is dubious, but technically there ARE cases where manufacturers will certify such a cord for 29 amps. So, it’s plausible. Maybe. HahaDespite all of these issues, I chose to install it in MY home using a dedicated 5-20 single outlet receptacle on a 30 amp circuit (10/2 romex). The receptacle is only rated for 20 amps, so yes, it’s risky. I chose to take this risk for one reason: It is installed on my hot water line. As long as my main water heater is working, my little heater will never run more than a couple of minutes. I’ve tested it multiple times and the cord doesn’t even get warm to the touch.If I wanted to install this on a cold water line that might run for 30 minutes at a time, I would probably want at least a 40 amp circuit and would replace the power cord accordingly. But honestly at that point, the best option is to go for a 240 volt unit. There really is no sensible use case for this device except on a hot water line to get hot water more quickly from a distant water heater.A few other things to note:- It only turns on with what I would consider “light moderate” water flow. A trickle will not do it.- It seems to activate if the incoming water is below 115°F. It turns off once the temp exceeds 130°F. That’s crazy hot and will burn your hands, so be careful.- Unfortunately it’s not adjustable. More flow will not give it a chance to heat up as much, so by turning the water on higher flow you can kind of game it. Takes a little getting used to.- The device feels decently made. It’s compact, solid, the water fittings had smooth mating surfaces, and the cord and plug are above average quality. I kinda trust it. Kinda. This is why it gets more than 1 star.- It does seem to be electronically controlled. As you’ll note in the screenshot the power used does vary, presumably based on demand. So, if you have a naturally warm water supply it MAY not use all the power (?), but since there’s no way to control or set it, I’d assume the max.Do I recommend this product? Yes, in your own home if you are confident in your own electrical and plumbing skills, are a risk-taker, and are supplementing a hot water line as I am. Otherwise, hard no. No way I’m installing one of these at mom’s house.Good luck and I hope this review informed you if nothing else :)