Not required., Sensazone additional solenoid valve: SZ/AVK15., Sensazone additional solenoid valve: SZ/AVK22., Sensazone additional solenoid valve: SZ/AVK1IN., Sensazone additional solenoid valve: SZ/AVK125., Sensazone light & fan shut-off connection module: SZ/LFC., Sensazone additional sensor kit: SZ/ASK.