The Honeywell Home Evohome HR91 smart thermostat button - M30 x 1.5 mm is suitable for the Honeywell Evohome system.
The HR91 smart radiator button is linked to one zone of evohome and follows the weekly programme that is set for that zone. The thermostat button has no local control option and is without a digital readout screen. The thermostat button can be controlled remotely via the Honeywell Evohome control panel.
The knob is fitted with an M30 adapter as standard. An M28 adapter is not included.