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How good is the app support for your heat pump?

 
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Air Source Heat Pumps (ASHPs)
Last Post by JamesPa 1 month ago
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 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 3969
04/12/2025 8:37 pm  

I would describe the Vaillant app as pretty reasonable-good.  You can change set temperature (which actually shifts the WC curve), change the wc curve itself (which is in the installer menu on the controller), switch heating/dhw/cooling on and off or to timed, set up a weekly schedule, set holiday mode, monitor all of the above, do a DHW boost.  You can also monitor and download energy and temperature stats.  You can see real time water pressure, power consumption OAT and IAT.

I dont use it much, occasionally I look at OAT when we are away, from time to time I monitor/download the energy stats.  The reason for this is that, having set up weather compensation and balanced the rads, the only real change we make to controls is to switch from pure WC, which we run for the vast majority of the season, to a temperature sensor limit mode at either end of the season, and to switch it off during the summer months.  Other than that we only very rarely touch the controls, because there is no need to.

Other than at the very ends of the season 'room influence' doesn't help for our house, unlike @judith.  What would help is humidity influence - ie the heat pump to increase the temperature a bit when its damp indoors.  This is a human factor, it feels colder when its damp!  Sadly, although the heat pump does measure and the app does report, humidity it doesn't react to it

From study of manuals only I would say that the Vaillant controller ('sensocomfort'), as distinct from the app, is one of the better ones in terms of UI and useful features.

I do also use HA for monitoring, because the graphs are nice and easier to 'get at'.  I don't use HA for heat pump control.  The interface to HA relies on the same cloud API as the app, no additional hardware needed.

 

 


This post was modified 1 month ago 4 times by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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 Batpred
(@batpred)
Prominent Member Member
Joined: 1 year ago
Posts: 451
05/12/2025 7:04 pm  

@jamespa 

Thank you, will need to take a closer look, as I am looking for programmable thermostat type of control. 

It also seems that the Vaillant ebus can be extended with an ESP32 device and HA integrations (similar to modbus for other pumps). This would be a local setup using simple hardware. A few relevant posts on HA around here! This eBUS Adapter Stick C6 seems get power from USB-C and directly taps the eBus? 

Chrome translate does miracles...


8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kw export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC


   
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 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 3969
05/12/2025 7:31 pm  

I think you are right about the ebus stick.

It's certainly possible to change at least some of the exposed vaillant parameters through the ha integration I use (requiring no hardware).  I just don't bother because, for me, it isn't necessary.  This does however rely on vaillants API and the cloud whereas an ebus implementation wouldn't.


This post was modified 1 month ago by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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