Stiebel Eltron DHX 15-2 Plus POU Electric Tankless Water Heater 14.4kW 240V

I had my contractor install the unit. It required that 220 be run to the kitchen, where this unit is installed. I still have my propane water heater which feeds into this tankless unit. The purpose of this is to keep the unit efficient since it is electric and on grid after sunset when the solar panels aren't producing power. The existing hot water line (from the propane water heater) is a very long run and can take up to 7 minutes for hot water to arrive in the kitchen. This unit allows for this type of installation and by the time the propane heated hot water arrives to the kitchen this unit has been providing plenty of hot water which is preventing a lot of water waste, the unit automatically adjusts itself to accommodate the incoming hot water. We now have hot water within seconds vs. minutes. I have designed homes with several different brands of tankless water heaters but the clients wouldn't pay the amount extra that this brand costs. I decided to try in on my own project and glad to say this unit has been maintenance free and has had no issues, worth the extra money. This unit feeds my kitchen sink and dishwasher.

For a long time I have been an evangelist of sorts for what I call POUET - Point Of Use Electric Tankless. I have done it in three house. Basically, it means having an electric tankless at virtually every water source. That's between 4-6 units per house. I'm a believer in POUET's ability to save water and power. PIus I love-love not waiting for hot water. I published an article once on Green Building Advisor. Phew! Be ready for a firestorm anytime you speak out on anthing different. I have bought...I dunno... maybe 2 dozen different units in my quest. This one is by far and away the best. It works great - but most properly sized units do that. Besides the great graphical interface, what is amazing is that this unit actually controls (slows) water flow to achieve set temperature. Amazing! Finally! I have a very unusual floating house with long exposed water line. It's winter right now and the incoming water can be near freezing. I set the temp to 102 for a shower, then watch the screen as the unit slows the flow down and down and down, from a start of 3.5 GPM down to .9 GPM (last night). This is something I used to have to do manually and tediously. Truly amazing! There is one thing that I wish it did better: As I said, I have a long, exposed water line. In the summertime, the incoming water can be quite hot. This unit has a unique feature in that it has the ability to tell you that the incoming water is hotter than the set temperure. In other words, it has a inlet temp sensor, but it only comes on in "over temp" conditions. Why not tell the inlet temp all the time? Inlet temp is a useful piece of info for tankless. I hope that made sense, but it may be TMI.

If you have the electrical capacity to have one of these its a must have. Instant hot water. I'm an electrician so I thought the hook up was fairly easy, as did my plumber. This is supplying water to a 1bdrm apartment with 2 sinks and one shower. All 3 can be running and there is no lack of hot water. I have a fairly light electrical load as all lighting is led, hvac is a mitsubishi mini split. The lights don't blink when this is in use nor does the ac bog down. While in use this actually draws 40 amps, with instantaneous jumps to 50 amps and immediately back down to 40amps. It is feed on #6 copper and is directly next to my panel so there is no voltage drop. Only had installed for 2 weeks but I'm highly impressed and hopefully it lasts a long time.

You will see that I gave this 4 stars, rather than FIVE. This is for three reasons, ONLY. 1) No Mounting template -- You must create your own mounting template or remove the cover and disconnect the wire from the cover to the unit to mount. It's ridiculous that a mounting template is not provided as other tankless water heaters do. 2) The display and controls are located inside the cover instead located on the main unit with holes through the cover to access. Having electronics in the cover means the cover is tethered via wire and plug to the main unit. This makes it virtually impossible to operate the unit with the cover removed for maintenance or testing. This flaw needs to be fixed on future models. Other tankless hot water heaters are not built with this flawed tethered design. 3) No strain relief clamp for power cable. You must purchase your own 3/4" strain relief clamp to secure the power cable. It would not have killed Stiebel to include this needed clamp. The previous described flaws notwithstanding, this is a truly awesome tankless hot water heater and in my opinion the best available for a single circuit 240v/60 amp unit. This water heater gives you very hot water using a single 60 amp 240v circuit (with 2-60 amp breakers). It delivers over 14000 watts of heating power. Similar water heaters deliver 8-11kw making the water heating potential WEAK. Another feature that as far as I know it exclusive to this brand and the DHX PLUS model is an electronic valve that automatically reduces water flow to maintain the set temperature. Other water heaters run cold when the flow rates exceeds the capacity of the water heater to heat all the water flowing through it. This water heater ALWAYS maintains the set temperature even if it must reduce flow to keep the water temperature at the set temperature. Until you have it in your home and operational you will not appreciate what a magical feature this can be!!! It also displays on the front panes the GPM or LPM flow rate. If demand exceeds capacity you can watch in real time as it dials back the flow to maintain temperature. It also has a bar graph on the display that tells you, in10% increments, the demand vs. capacity that is occuring Right NOW. As you turn on/off faucets and draw hot water, you can see the graph tick up and down to see how close to capacity the hot water heater is operating. The display is LCD (with a backlight) and NOT LED. This is important because you can see the set temperature without drawing any hot water. When the unit is idle and not heating water you can see the temperature so you can make adjustments without water running. OTHER tankless water heaters go dark when no hot water is being drawn. So for other hot water heaters you must turn on hot water to make temperature adjustments. Not so with the Stiebel...you can change water temperature and settings with no hot water running. In almost all respects, I LOVE this product. In my opinion, you cannot go wrong purchasing this unit. I rate it a MUST BUY !!!

The tech support from this company is the best. Works great, hot water at the sink in a few seconds.

Cant say that I've had the best experience with this water heater. I bought the unit for a bathroom remodel i was about to do so i could have a dedicated unit for the shower. I opened the box to inspect the unit when i got it just to make sure it wasn't damaged. The turn knob was laying in the box and damaged but i didn't think that was enough to go through the hassle of returning it. When i went to install it i noticed the sticker on the inside was listed as 12000w which was odd since the unit I ordered was a 15k unit. Once I got it all wired up and plumbed in the first use it would not maintain a temp. The power bar goes from 30% to 100% and back to 30% making for an interesting shower. It also makes an extremely annoying whining sound as it clamps down on the flow then releases and does that the entire time the unit is activated. I thought maybe it was too much flow as i was right at 1 gpm so i lowered the inlet down to get to a .2 gpm flow and it still does the exact same thing. Stiebel says due to it most likely being a returned unit from amazon they wont warranty it and Amazon says since its past the return date they will only refund a small portion of the cost. I really only wanted an exchange or the parts to fix i even offered to Stiebel to pay for the parts. Due to all this if you buy the unit from Amazon i would advise to remove the front cover and make sure the wattage sticker matches what you bought and plumb it in to test as soon as possible.

I bought mine used in excellent condition to save some money. I'm very impressed the way it works so far. Outstanding piece of equipment.

We have a brand new condo in Panama, with a DCE Premium tankless water heater. This unit produces almost no hot water, except in the laundry room sink where the unit is installed. The bathrooms in the bedrooms get very little hot water, and the temperature never gets above lukewarm. We have had this serviced repeatedly and are always told the unit is working properly. The bottom line is this water heater cannot deliver hot water except to a faucet in its immediate vicinity. We will have to replace this brand-new unit.

Excelente produto, ótimo funcionamento, mantendo a temperatura constante e com precisão. Bem acabado, leve, bonito e silencioso. Recomendo.

Muy buena calidad, buen tamaño y fácil de instalar