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Your cart is empty.The Professional Classic Tankless Electric RTEX-24 240 V is engineered to provide continuous hot water on demand, making it ideal for both single point-of-use and multiple applications, with a remarkable flow rate of 5.9 GPM. Its compact design is up to 93% smaller than traditional electric water heaters, allowing for significant space savings, while its energy-efficient operation eliminates standby heat loss when installed near the point-of-use.
Kyle
2025-09-03 15:35:52
So let me begin this by saying that I purchased this off Amazon warehouse for a discounted price of $171. After tax and shipping it came out to $188. This is drastically lower than the price home Depot or Lowe's would offer of nearly $600 plus tax. So when my water heater went out, and I was looking for a quick fix I searched tankless water heater on Amazon and found this. I recently had installed one of these at a friend's house, they got the largest option for the Rheem tankless water heater. The install at their house did not go well. The first unit that we got I installed, and it did not work. I thought it was something I did and spent hours troubleshooting just to find out that the board on the unit, which was brand new, was bad. So we exchanged and got another one and it installed just fine. Plugged it in and it worksThat said, I wasn't sure what to expect and was hoping for a better situation this time. And a better situation is what I got. I had no problems installing this unit, it's set up very easily and worked exactly as intended. I could not be happier! It is a small compact unit and it heats very quickly. I will update this when the first bill comes if it is outrageous. But I can't imagine it would be. The system seems to work well, and I'm confident that it will continue to do so.
Customer
2025-07-20 14:08:06
This product is very good. We replaced our old one and it is very efficient.
Brian D. Allison
2025-07-11 11:25:26
Very pleased with the product; although, not using it as a stand-alone.It's being used as a water pre-heater for my standard water heater.The water coming into my home (this time of year) is very cold and my regular water heater has difficulty providing a continuous supply of hot water (enjoy taking long, hot showers).With this product as a water pre-heater, my family and I can take showers, run washing machines, and run dishwashers as much as we want and still have plenty of hot water.The unit is very compact given a regular water heater requires quite a bit of space.From an electrical standpoint, it does require ~ 100 amps (220 V).
JR
2025-05-31 12:34:20
Water sensor recived is not same as pictured but it works fine. Seller gave wrong description.
Mia Abanto
2025-05-18 10:59:52
My house is almost 3,000 square foot house, multilevels, total 3 bathrooms, a large kitchen. This tankless water heater is the best. It replaced an old 50 gallons tank, which we used to run out of hot water all the time. I love to the fact that it only turns on when someone opens the faucet on hot water. I have it set up at 133 degrees, which gives me a 20 second instant water. It will save us a lot of money since the water is not constely reheating. Make sure you have a braker of 100 amps for this to even work. Love it.
Tobias Young
2025-04-22 18:12:08
Easy hookup, no issues
Jason
2025-04-20 11:55:34
When we first hooked it up it made a awful noise for about 24-36 hours. I ordered a set of the orifice plates to put on the inlet water side. I quit making the noise on its on and I never installed the restriction orifice plates. It is installed in our river camp and it keeps up well with two bathroom house and 5 girls. No complaints.
Patrick Everdell
2025-04-16 11:38:13
This is the fourth tankless we've owned. The first was destroyed in a fire and we still have the other two working at family cabins. First I want to point out some fundamental pros. It is small, the size of a suitcase while a tankked heater needs a lot of space. Secondly as long as you have power you never run out of hot water. With three boys in the house we'd run out of hot water with the tank heater, not so with the tankless. The third pro takes a while to notice,, Less electricity use = smaller bill. My average monthly bill was $120. it was $90 after the tankless was installed. The cons would be that if you lose power you have no hot water, but how often does that happen? Also are you needing hot water at the time IF it happens? Second con is the 24& 27KW units need Three double throw 40 amp breakers. and needs feeding with 8 gauge wire. They are whole house units. No you cannot just wire it on your tank heater line. A tank heater doesn't require "INSTANT" power as it uses lower power most ALL of the time. A tankles uses a lot of power ONLY when you need hot water. Most of the time it is off. I've read the low star ratings and it is fairly obvious that these persons did not do their research or read the manual. One complaint was the water only became warm. The person was using a 6kw unit for his full house. Those units are for low flow point of use. Use the correct sie for the intended usage and need! The last con observation is you will notice that it takes the same amount of time to get hot water out to the faucet as it does with a tank heater. The law of physicials and all.... The bottom line here is DO YOUR DUE DILIGENCE/RESEARCH so there are no surprises. The manufacturers tell you what it does and what you need to make it work. My conclusion is I Recommend this unit. When you get it PROPERLY installed it will work so well you will forget about it.
JOSE AURI ALMEIDA
2025-04-08 18:33:58
Muito bom o produto. Recomendo. Apesar do preço ser alto.
Marc-Olivier Gemme
2025-03-15 11:48:07
Très beau et bon produit. Par contre le 24 kw manque un peu de puissance. L’hiver n’est pas encore arrivé et il m’est impossible de faire remplir mon bain à plein débit d’eau chaude car l’eau est trop froide. Je dois remplir le bain avec la moitié du débit du robinet si je veux qu’il soit assez chaud. Avoir à acheter de nouveau, j’aurais choisi 32 ou 37 kw.
el evaluador
2025-03-02 14:54:20
ES IMPORTANTE CONOCER LAS ESPECIFICACIONES Y TENER UN ASESORAMIENTO DE COSTOS ANTES DE COMPRAR MI EXPERIENCIA FUE MUY TRISTE PORQUE COMPRE EL PRODUCTO CON MUCHA ILUSION Y RESULTA QUE LA INSTALACION ME IBA A COSTAR 3 VECES QUE EL COSTO DEL CALENTADOR.LO TUVE QUE REGRESARESPECIFICAMENTE EL PROBLEMA FUE LA ESPECIFICACION DEL CABLE EN RELACION AL AMPERAJE DEL PRODUCTO
Joe Bell
2025-01-26 09:09:50
I am going to have to return it ,it is a very good unit but my power is not good enough
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