# On/Off switch for central heating **URL:** \ **Category:** Questions & Help\ **Created:** [June 9, 2019, 2:39pm UTC](https://community.homey.app/t/on-off-switch-for-central-heating/14250 "2019-06-09T14:39:12Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Eternity](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/eternity/32/102113_2.png) [@Eternity](https://community.homey.app/u/Eternity)\ **Post date:** [June 9, 2019, 2:39pm UTC](https://community.homey.app/t/on-off-switch-for-central-heating/14250/1 "2019-06-09T14:39:12Z")
What z-wave or zigbee device would be able to switch on/off a central heating system (Centrale verwarming in Dutch) ? I believe that if you close circuit the two wires of a cv thermostat connection, the cv will switch on. ---
**Author:** ![FKey](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/fkey/32/14793_2.png) [@FKey](https://community.homey.app/u/FKey)\ **Post date:** [June 9, 2019, 6:55pm UTC](https://community.homey.app/t/on-off-switch-for-central-heating/14250/4 "2019-06-09T18:55:59Z")
> [@Eternity](#): > > I believe that if you close circuit the two wires of a cv thermostat connection, the cv will switch on. In the netherlands There are 2 systems of central heating: 1 On/Of, this one will work with a switch that closes 2 Opentherm this is a protocal, so the switch will not work So make sure you check what type of heater you have. ---
**Author:** ![Eternity](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/eternity/32/102113_2.png) [@Eternity](https://community.homey.app/u/Eternity)\ **Post date:** [June 9, 2019, 7:36pm UTC](https://community.homey.app/t/on-off-switch-for-central-heating/14250/5 "2019-06-09T19:36:17Z")
@FKey Yes, I am aware of that. As I have floor heating, I was told on/off is fine. Back to the question: what would be best to short circuit this? Would any on/off relay be fine? ---
**Author:** ![Rocodamelshekima](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rocodamelshekima/32/8209_2.png) [@Rocodamelshekima](https://community.homey.app/u/Rocodamelshekima)\ **Post date:** [June 9, 2019, 8:20pm UTC](https://community.homey.app/t/on-off-switch-for-central-heating/14250/6 "2019-06-09T20:20:50Z")
There is even systems with 220v for thermostats so it does depend on ur system like Fkey mentioned. And as u have floor heating does not mean u need on/off ofc. I have floor heating running on OpenTherm. ---
**Author:** ![FKey](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/fkey/32/14793_2.png) [@FKey](https://community.homey.app/u/FKey)\ **Post date:** [June 9, 2019, 8:58pm UTC](https://community.homey.app/t/on-off-switch-for-central-heating/14250/7 "2019-06-09T20:58:34Z")
> [@Eternity](#): > > Yes, I am aware of that. As I have floor heating, I was told on/off is fine The system is determined by the central heating, You cannot connect an On/Of to an opentherm. I agree with @Rocodamelshekima, floor heating does not mean you can do On/Of