# Vaillant water boiler solution **URL:** \ **Category:** Questions & Help\ **Created:** [December 2, 2020, 2:43pm UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433 "2020-12-02T14:43:32Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Daniel\_S](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/daniel_s/32/24881_2.png) [@Daniel\_S](https://community.homey.app/u/Daniel_S)\ **Post date:** [December 2, 2020, 2:43pm UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433/1 "2020-12-02T14:43:32Z")
Hi, I have water underfloor heating on Vaillant gas boiler and ofcourse water heating. I have manual termostats in each room. I am hesitant to spend any money on smart termostats, because I barely change temperature during winter. Its just how underfloor works and the cost would never justify, i would not save any money with it. Anyway I would like to find solution for water boiler so that I can monitor and set water heating for presence at home and vice versa. Any tips how can I easily connect it to Homey? So my purpose is to control water boiler not house heating. Many thanks for suggestions. ---
**Author:** ![K\_S](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/k_s/32/11635_2.png) [@K\_S](https://community.homey.app/u/K_S)\ **Post date:** [December 2, 2020, 4:30pm UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433/2 "2020-12-02T16:30:07Z")
Hello, I think the Vailant boiler will have a signal cable / input that when live tells the boiler to heat the hot water. Some plumbers wire that to a momentary switch because and I think it gets overridden by a wired timer input if one is installed. You could use a fibaro/other relay / switch to trigger that and then some flows to control the timing or maybe one of the heating scheduler apps: [Homey Heating Scheduler App for Homey | Homey](https://homey.app/en-us/app/app.mskg.homey-heating/Homey-Heating-Scheduler/) or [Heating Controller App for Homey | Homey](https://homey.app/en-us/app/no.almli.heatingcontroller/Heating-Controller/) perhaps? ---
**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:** [December 2, 2020, 4:32pm UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433/3 "2020-12-02T16:32:18Z")
> [@K\_S](#): > > I think the Vailant boiler will have a signal cable / input that when live tells the boiler to heat the hot water I doubt that. ---
**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:** [December 2, 2020, 7:06pm UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433/4 "2020-12-02T19:06:57Z")
Does your vaillant support opentherm. In that case the opentherm gateway can be a start. There is [an app](https://homey.app/nl-nl/app/com.tclcode.otgw/OpenTherm-Gateway/) for it. This way homey can set opentherm parameters ---
**Author:** ![Daniel\_S](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/daniel_s/32/24881_2.png) [@Daniel\_S](https://community.homey.app/u/Daniel_S)\ **Post date:** [December 3, 2020, 10:27am UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433/5 "2020-12-03T10:27:48Z")
Seems like I need to add module vr33 to my Vaillant. Thanks for the hint. [https://myboiler.com/opentherm/vaillant-opentherm/](https://myboiler.com/opentherm/vaillant-opentherm/) ---
**Author:** ![K\_S](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/k_s/32/11635_2.png) [@K\_S](https://community.homey.app/u/K_S)\ **Post date:** [December 9, 2020, 9:48pm UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433/6 "2020-12-09T21:48:57Z")
Why do you doubt it? My ecoTEC 627 had it, and that’s how many boilers work. How do you suppose wired thermostat requests heat from the boiler? ---
**Author:** ![Daniel\_S](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/daniel_s/32/24881_2.png) [@Daniel\_S](https://community.homey.app/u/Daniel_S)\ **Post date:** [December 10, 2020, 10:01am UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433/7 "2020-12-10T10:01:55Z")
So the simple relay you think might help me? ---
**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:** [December 10, 2020, 10:29am UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433/8 "2020-12-10T10:29:58Z")
> [@K\_S](#): > > How do you suppose wired thermostat requests heat from the boiler? Trough a special designed protocol for it like Nefit has or something like OT. If u think **any** Vaillant can be a relais attached to to get the hot water heating then i doubt that. ---
**Author:** ![K\_S](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/k_s/32/11635_2.png) [@K\_S](https://community.homey.app/u/K_S)\ **Post date:** [December 10, 2020, 11:03am UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433/9 "2020-12-10T11:03:18Z")
> [@Rocodamelshekima](#): > > If u think **any** Vaillant can be a relais attached to to get the hot water heating then i doubt that. Well I don’t know about "any Vaillant ", and I don’t know what “Nefit” “OT” are but certainly the one I mentioned works with simple electrical circuit / signal that sends demand for heating, and indeed my plumber used a Fibaro switch relay to make it work. I suspect since it is only 2 years old, then many other boilers work the same. I can’t see why they would need anything more complicated from a physical timer switch or thermostat installed in so many many houses. ---
**Author:** ![semolex](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/semolex/32/124504_2.png) [@semolex](https://community.homey.app/u/semolex)\ **Post date:** [January 29, 2025, 10:04pm UTC](https://community.homey.app/t/vaillant-water-boiler-solution/38433/11 "2025-01-29T22:04:00Z")
You either need to connect somethink like their VR921 gateway and then use their official app called myVaillant Then you can connect this app via Home Assistant to Homey ![IMG_5001](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/9/f/9f9ad0fa8afb8abad9d23c27ac7f378bb9ddf0f0.jpeg) That is what I do now. I tried to integrate their API to Homey directly but unfortunately I so not have enough time to do this now