Program options: On 24hrs, OFF, All Day or Auto.;3 ON and three OFF periods per day.;Mains powered with battery back up.;Boost and advance.;7 Day time control suitable for combi boiler applications.

• Horstmann CentaurPlus C17 Central Heating Only Programmer / Timeswitch 7 Day

Horstmann CentaurPlus C17 Central Heating Only Programmer / Timeswitch 7 DayHorstmann