# Rheem Performance 18 kW 240-Volt Self-Modulating Electric Tankless Water Heater

**Brand:** [Rheem](https://shop.coreranger.com/brands/Rheem)
**Price:** $255–$999 · in stock
**URL:** https://shop.coreranger.com/product/rheem-performance-18-kw-240-volt-self-modulating-electric-tankless-water-heater-320485653

## Options

- **Maximum Flow Rate (gallons per minute):** 1.55, 2.15, 2.54, 3.51, 4.68, 5.27, 7.03

## Variants

| Variant | SKU | Price | Stock |
|---|---|---|---|
| 2.15 | RETEX-11 | $255 | in stock |
| 1.55 | RETEX-08 | $256.83 | in stock |
| 2.54 | RETEX-13 | $299 | in stock |
| 3.51 | RETEX-18 | $439 | in stock |
| 4.68 | RETEX-24 | $543.99 | in stock |
| 5.27 | RETEX-27 | $549 | in stock |
| 7.03 | RETEX-36 | $999 | in stock |

## Specifications

| Spec | Value |
|---|---|
| Kilowatt | 18 |
| Returnable | 90-Day |
| Amperage (A) | 75 A |
| Part Warranty | 1 Year |
| Indoor/Outdoor | Indoor |
| Wattage (watts) | 18000 W |
| Application Type | Residential |
| Number of Showers | 1-2 |
| Water Heater Type | Electric |
| Product Depth (in.) | 3.5 in |
| Product Width (in.) | 14.5 in |
| Product Height (in.) | 18 in |
| Product Weight (lb.) | 11 lb |
| Uniform Energy Factor | 0 |
| Water Heater Features | Wall Mounted |
| Required Volt Connection | 240 volt |
| Certifications and Listings | CSA Listed,ETL Listed,UL Listed |
| Water Connection Size (in.) | 3/4 |
| First Hour of Delivery (gallons/hr) | 211 |
| Flow Rate @ 45° Rise (gallons/min) | 2.73 gal (US)/min |
| Flow Rate @ 35°F Rise (gallons/min) | 3.51 gal (US)/min |
| Maximum Flow Rate (gallons per minute) | 3.51 |

## Description

Get hot water for your space with this Performance Self-Modulating Tankless Electric Water Heater. This energy-efficient tankless water heater delivers an endless hot water supply and consistent temperature with a self-modulating technology that adjusts energy based on your hot water needs. With the electronic thermostatic temperature, you can easily read the incoming water temperature and control it in one-degree increments. Point-of-use installation and compact size makes this Performance tankless water heater a convenient choice.

• Electric tankless water heater provides consistent hot water
• Energy and cost savings of up to 34% in whole-home installations
• Tankless water heater requires 2 x 40 AMP. double pole breakers