Marey Power Gas 10L 3.1GPM Tankless Water Heater with Compact Design and High Performance

Amazon Customer: Mine works, which is the reason for the rating. My systems(gas and water) are good though. If yours aren't buy something else. Main thing to know is a safety issue that I didn't see anywhere(PDF; company vids..etc). This thing heats water only based on flow rate, if water goes thru the flame quickly its cooler; if it goes thru the flame slower its hotter. And thats it, very simple. It should be operated from the hot water valve only. If you turn on the cold water valve, it slows the rate of the water thru the flame, making it very hot. So if you turn off the cold valve first, you are going to have body parts that you want to keep, burned... I have mine set on "Winter": water pressure dial on highest and the flame set at 2/3s of the way down. I control the temperature from the hot water valve only in my shower.. All the way on is cooler for kids, I turn the valve down to make it hotter for myself... That controls the flow rate thru the machine very well and makes a consistent long lasting perfect, safe shower. Use a shower head that is not restricted. Instruct guests before they shower. Install was the other thing; company videos and other you tube vids are...

United States on May 30, 2021

Lola: Do not buy this item. I can not get it installed by a licence technician. It is not approved by Canada.

Canada on Mar 18, 2020

tapestry: This is a great little water heater. If it seems to not work turn down the flow. What is happening is the water is going throu too fast to heat up. Mine is in an outdoor cabinet. Really should be inside away from the cold.. I will insulate itthroughouly.

United States on Jan 30, 2020

Andy: never buy another one of these

Canada on Jun 28, 2019

Ron H: This hot water heater and very excited and happy to have the day before the heater blew up and I didn’t want to go to Home Depot or Lowe’s because you’re about $1500 so I word this online the next day delivery and we are very happy

Canada on Apr 18, 2019

John F.John F.: Once adjusted properly this is a great water heater for the price. At first I had the water flow turned down all the way and the gas turned all the way up. This produced very hot water but it would shut off after a minute or two. Now that the flow is up a little from the lowest setting and the gas backed off a little from the highest setting and set to winter it gives just enough flow and plenty of heat for a good shower. Also, I never saw the chart pictured until I got the heater. Yes, it flows 3GPM, but only heats the water 30F at that flow rate. If I'd known all this I would have bought the 16L model, it's only 50% more expensive.
Finally, I only discovered by experimenting with it that the flow setting influences how sensitive it is to being turned on. If you have the flow turned up too high, the heater will not start when you just have a faucet on. The way I have mine adjusted it will turn on if the faucet is on all the way, but won't run if at a low flow setting, like while shaving. Not the end of the world, just another thing I never read about before buying.
The main reason I bought it which definitely panned out is that it is much smaller...

United States on Oct 08, 2017

Jeffery L.: The water heater arrived one day later than it was supposed to (with Prime) which meant no hot water for another day and forcing me to take a half day off of work. When it arrived I immediately set about removing the old 40 gallon natural gas water heater and installing this one. Because of the switch to tankless I had to purchase several adapters, fittings, and extensions for the gas and water lines, I had expected this. The total for these parts was about $80. After installation and review of the post-installation check list found in the quick start guide I turned the water on and tested the unit. The burner ignited the instant a hot water valve was opened. This seemed promising!

The following morning the problems started. I awoke to complaints. There was either no hot water or scalding hot water. When I tried to prove them all wrong by showering before work I turned the valve on full hot until the water warmed up then dialed it back to a comfortable temperature. It quickly went cold. I slowly turned it back to hot but the temperature did not change until the knob maxed out at "H", at which point scalding hot water began flowing. I attempted to...

United States on Mar 22, 2017