Honeywell Evohome System

Honeywell Evohome System

The most extensive wireless heating control system available.

Home page: http://evohome.info

new version

The system was revamped for 2014 and now consists of the following components.

• Evohome color graphical touch control panel ("Evohome controller") (THR928) with optional separate Ethernet gateway (RFG100) or Evohome controller with built-in Wi-Fi adapter (ATC928) — either one connects to the Internet and is controllable via mobile-device apps (via a Honeywell server)
• HR92 or HR80 TRV
• Underfloor heating controllers (HCE80, HCC80)
• Mixing vavle controller (HM80)
• Cylinder thermostat (CS92)
• Room thermostat (DTS92)
• Room temperature sensor (HCF82 or HCW82)
• Outdoor thermometer (HB85)
• on/off (BDR91) or OpenTherm (R8810) boiler controller

Product announcement: http://www.automatedhome.co.uk/new-products/honeywell-reveal-new-evohome-smartphone-controlled-zoned-heating-system.html

Works with IFTTT.

original version

• Evotouch greyscale graphical touch control panel
• HR80 TRV
• on/off (BDR91) or OpenTherm (R8810) boiler controller

The original Evohome system included the HR80 TRV which was introduced years ago as part of the Honeywell Hometronic System. The HR80 can still be used with the 2014 Evohome system so long as it has firmware version 2.03 or later.

Communication protocol is proprietary over 868MHz FSK. There is some open source software to monitor the system's radio comms: https://github.com/jrosser/honeymon/wiki https://github.com/jrosser/honeymon

There's a very capable home automation controller available that's compatible with it: https://www.centraline.com/uploads/ecat-en2/ecatdata/pg_clhawk.html

Someone's experience with the original Evohome system: http://hwch.myzen.co.uk/blog/category/honeywell-evohome/