OpenTherm controls
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Controls supporting the OpenTherm protocol (Elektrobock PT-5x and BPT-5x series) communicate digitally with the boiler's electronics over two wires and allow smooth modulation of output according to actual heat demand – meaning more precise and economical control than a classic on/off thermostat.
Both wired (PT-52, PT-55, PT-55X, PT-59, PT-59X) and wireless (BPT-37, BPT-55, BPT-57) versions are available.
Frequently Asked Questions
- What is OpenTherm and why is it beneficial? OpenTherm is a standardized communication protocol between the thermostat and the boiler that allows smooth modulation of output and more precise temperature maintenance.
- Does the boiler need to support OpenTherm? Yes, these controls only reach their full potential with a boiler that has an OpenTherm input/output.
- What is the difference between PT-55 and PT-55X? These are different generations/variants of the control with an updated design or features; we recommend verifying compatibility with your specific boiler before purchase.
- Can an OpenTherm control be used on a boiler without an OpenTherm input? Some models also support a potential-free contact mode, but you will only benefit from smooth output modulation with an OpenTherm boiler.