Rheem RTEX-11 11kW 240V Tankless Electric Water Heater – Point-of-Use Hot Water

Rheem RTEX-11: Instant Hot Water in a Compact, Space-Saving Package

The Rheem Performance RTEX-11 is an 11 kW, 240V tankless electric water heater designed for point-of-use installations. It delivers hot water on demand without the bulk of a traditional tank, and it requires no venting, making it a versatile choice for tight spaces like under-sink locations, apartments, or small offices. Its sleek profile is about 90 percent smaller than a typical storage tank, helping you reclaim cabinet or closet space while keeping your water heating localized where you need it most.

With a focus on efficiency, this unit heats water only when you call for it, avoiding the constant energy draw of a stored tank. The RTEX-11 can support on-demand hot water at the tap in compact setups, giving you a practical balance of performance and footprint for lighter, point-of-use needs. It’s a thoughtful option when you want steady access to hot water without a bulky heater nearby.

Key Features

• ON/OFF Dial Control with adjustable digital temperature display
• Self-modulating power control
• 11kW Model Flow Rate: up to 2.68 GPM
• Side 1/2" NPT water connections
• On demand, consistent and continuous hot water

Practical Use Scenarios

• Point-of-use setups in kitchens or bathrooms where space is at a premium
• Under-sink installations in apartments, studios, or small offices
• Homes with multiple point-of-use locations sharing a compact 11 kW unit

Performance and Space Benefits

Designed for easy placement, the RTEX-11’s vent-free design simplifies installation in closets, cabinets, or utility nooks. The unit’s self-modulating power keeps heat output aligned with demand, which can translate to more efficient operation at modest hot water needs. When you turn on a faucet, the system responds with steady, on-demand hot water, giving you comfort without the wait or waste associated with larger storage tanks.

Specifications at a Glance

• Power: 11 kW
• Voltage: 240V
• Max Flow: up to 2.68 GPM
• Connections: 1/2" NPT water lines
• Form Factor: Tankless, compact, space-saving

Note: For larger homes or higher simultaneous hot water needs, higher-capacity models may be more appropriate. Always verify inlet water temperature, electrical requirements, and installation clearances with a qualified professional before proceeding.