Rheem^® ThermaForce^® Combi Boiler: No Domestic Hot Water Diverter Valve Required

Many combi boilers rely on a secondary plate heat exchanger and a 3-way diverting valve to switch between space heating and domestic hot water production. While this design is common throughout the combi boiler industry, the valve is a moving mechanical component that must continuously shift between operating modes. Over time, wear, debris, or actuator issues can affect its performance, potentially leading to service calls, reduced hot water delivery, or interrupted heating operation.

The Rheem^® ThermaForce^® Combi Boiler takes a different approach. Instead of relying on a secondary plate heat exchanger and 3-way diverting valve, ThermaForce uses a patented labyrinth heat exchanger with separate space heating and domestic hot water copper waterways. Directly heating domestic hot water in the primary heat exchanger eliminates the commonly used plate heat exchanger and 3-way diverting valve, removing a potential maintenance point from the system.

This simplified design offers several benefits for both contractors and homeowners:

• Fewer moving parts to wear or fail over time
• Reduced maintenance concerns
• Enhanced long-term reliability
• Consistent hot water performance
• Simplified troubleshooting and service
• Greater domestic hot water operation efficiency

For Contractors: Simplified Installation & Service

For contractors, fewer components can mean less time diagnosing issues and a more straightforward service experience. The streamlined design helps support easier maintenance while reducing dependence on a part that commonly handles critical switching functions.

For Homeowners: Reliable Comfort by Design

For homeowners, the benefits are equally important. A boiler designed with fewer mechanical wear points can help provide dependable comfort and hot water performance year after year, along with added peace of mind.

The result is a smarter combi boiler design that prioritizes reliability without sacrificing performance. By eliminating the need for a traditional 3-way diverting valve, the ThermaForce Combi Boiler delivers efficient heating, dependable hot water, and a simpler approach to long-term system operation.

In addition to its innovative heat exchanger design, the ThermaForce Combi Boiler combines high-efficiency condensing performance with contractor-focused features that help simplify installation, service, and everyday operation. Whether serving a new construction project or a replacement application, ThermaForce is engineered to provide reliable home heating and continuous domestic hot water from a single, space-saving solution.

To learn more about the ThermaForce Boilers and the complete Rheem boiler portfolio, visit www.rheem.com/boiler.