--- product_id: 261635010 title: "240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY" brand: "rheem" price: "€ 910.05" currency: EUR in_stock: true url: https://www.desertcart.hr/products/261635010-240v-heating-chamber-rtex-13-residential-tankless-water-heater-gray store_origin: HR region: Croatia --- # 13kW rapid heating power Up to 4.8 GPM flow rate ±1°F precise digital thermostat 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY **Brand:** rheem **Price:** € 910.05 **Availability:** ✅ In Stock ## Summary > 🔥 Instant Hot Water, Zero Wait — Elevate Your Everyday Comfort! ## Quick Answers - **What is this?** 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY by rheem - **How much does it cost?** € 910.05 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/261635010-240v-heating-chamber-rtex-13-residential-tankless-water-heater-gray) ## Best For - rheem enthusiasts ## Why This Product - Trusted rheem brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Energy-Smart Efficiency:** 99.8% energy efficient design slashes utility bills while delivering endless hot water. - • **Compact & Wall-Mount Ready:** Space-saving 1.8 kg unit fits discreetly on any wall for modern minimalist homes. - • **Precision Temperature Control:** Adjust your perfect hot water temp with ±1°F accuracy via sleek LED display. - • **Durable Copper Heating Elements:** Long-lasting, field-serviceable copper immersion elements ensure reliable performance. - • **Easy Installation & Maintenance:** Includes 1/2 NPT adapters and compression fittings for hassle-free setup and upgrades. ## Overview The Rheem RTEX-13 is a 240V residential tankless water heater delivering continuous hot water on demand with 13kW power and up to 4.8 gallons per minute flow. Featuring a precise external digital thermostat with LED display, durable copper heating elements, and 99.8% energy efficiency, it offers a compact, wall-mountable solution designed for easy installation and long-term reliability. ## Description Professional classic® tankless electric water heaters offer continuous hot water quick and on demand for single point-of-use or multiple applications ## Features - External adjustable digital thermostatic control with LED display (+/1 degree accuracy - Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control - Simple installation – 1/2 NPT adapters included; side 1/2 inch Compression water connections - 99.8% energy efficient. External controls to adjust temperature in increments of 1°f. Water-Saver Shower Head – 1.5 GPM - Threaded for easy replacement, simple installation, digital temperature display 54 A. 13kW Model Flow Rate: up to 3.17 GPM - 54 A ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01NAUZJPE | | ASIN | B01NAUZJPE | | Best Sellers Rank | #103,699 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #110 in Water Heaters | | Brand Name | Rheem | | Capacity | 1.5 Gallons | | Color | Gray | | Customer Reviews | 4.4 4.4 out of 5 stars (1,338) | | Customer reviews | 4.4 4.4 out of 5 stars (1,338) | | Date First Available | 2 March 2017 | | Efficiency | at least 99.8% energy efficient | | Flow Rate | 4.8 Gallons Per Minute | | Global Trade Identification Number | 00020352685328 | | Heat Output | 13 Kilowatts | | Included Components | Rheem RTEX-13 Residential Tankless Water Heater | | Is Discontinued By Manufacturer | No | | Is Electric | Yes | | Item Depth | 0.5 inches | | Item Dimensions W x H | 25W x 25H millimeters | | Item Type Name | Rheem RTEX-13 Residential Tankless Water Heater | | Item Weight | 1.8 Kilograms | | Item model number | RTEX-13 | | Manufacturer | Rheem | | Manufacturer | Rheem | | Manufacturer Part Number | RTEX-13 | | Material Type | Copper | | Maximum Pressure | 8 Bars | | Maximum Temperature | 140 Degrees Fahrenheit | | Model Number | RTEX-13 | | Mount Type | Wall | | Power Source | Electric | | Product Dimensions | 32.08 x 20.96 x 9.22 cm; 1.8 kg | | Special Features | LED Display | | Style Name | Heater | | UPC | 020352685328 | | Unit Count | 1.0 Count | | Voltage | 240 Volts | | Wattage | 13 KW | ## Product Details - **Brand:** Rheem - **Capacity:** 1.5 Gallons - **Power source:** Electric - **Product dimensions:** 25W x 25H millimeters - **Special features:** LED Display ## Images ![240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY - Image 1](https://m.media-amazon.com/images/I/31ivMdN84FL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: How many amps are needed for rheem rtex - 13 240v heating tankless electric water heater** A: Hello-The RTEX-13 requires 1x 60A@240V breaker / 6 AWG recommended wire size.Specs - http://cdn.globalimageserver.com/fetchdocument-rh.aspx?name=Specification-Sheet&id=fc3235b7-7cd0-42cd-93bc-7169ea92be31 Rheem 800-432-8373I hope this helped :)Ben **Q: Do these tankless water heaters require an overflow line to the outside of the home or a pan like is required on normal water heaters ?** A: No tank, so, no overflow line required. It mounts on the wall. A pan is needed if required by building code in your city. **Q: We have a 500sq' apt. 1 kitchen sink, 1 lav sink and tub/shower. This tankless heats water to both sinks but nothing to the tub/sh. Help** A: Sinks have aerators to slow down the water where a tub doesn't. It sounds like one possibility is that your exceeding the GPM for this heater. Next possibility, double check an measure your actually getting at least 240v at the heater, I had an issue where my unit was only getting 235v an it was causing a similar issue where only one of the two heating elements was activating. I had it set to 125F but it was coming out 100F. It was warm and without a meter I would of thought it was working correctly until I tried filling a tub. It couldn't even get the water warm. I pulled my wires out an restripped an cut an screwed them in an it fixed my problem, now its measuring around 245v. Make sure there is no copper showing after screwing down your input wires. Now filling the tub I noticed after about 10-15 seconds the water gets too hot to touch. I set it to 135F. **Q: El titan n270 me puede alimentar 3 baños y agua caliente en toda la casa.** A: Solo tengo un baño y me sirve muy bien el calentador. Mi casa es pequeña. I'm sorry. ## Frequently Bought Together - Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY - HYDRO MASTER Tankless Water Heater Service Valve Kit with Pressure Relief Valve 3/4-Inch IPS Isolator Clean Brass - Waterdrop AP431 AP430SS Whole House Scale Inhibitor Filter, Heater Softener System, Prevent Scale Build Up On Hot Water Heaters, Pipes and Boilers --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/261635010-240v-heating-chamber-rtex-13-residential-tankless-water-heater-gray](https://www.desertcart.hr/products/261635010-240v-heating-chamber-rtex-13-residential-tankless-water-heater-gray) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-26*