Get hot water instantly with the Rheem RETEX-04 3.5 kW Point-of-Use Electric Tankless Water Heater. This indoor water heater in grey and black color is perfect for small spaces. It has a power source of corded electric and a flow rate of 0.5 gallons per minute. It is manufactured by RHEEM/RICHMOND MFG, a well-known brand in the industry. The model number of this product is RMTEX-04, and it comes with electric features.