# Daikin Altherma, ESPAltherma & Home Assistant with OpenEnergyMonitor

**URL:** <https://community.openenergymonitor.org/t/daikin-altherma-espaltherma-home-assistant-with-openenergymonitor/25057>\
**Category:** Heatpump\
**Created:** [11 December 2023 14:48 UTC](https://community.openenergymonitor.org/t/daikin-altherma-espaltherma-home-assistant-with-openenergymonitor/25057 "2023-12-11T14:48:16Z")\
**Posts on this page:** 1\
**Showing post:** 253

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**Author:** ![tiger\_cook](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/tiger_cook/32/27858_2.png) [@tiger\_cook](https://community.openenergymonitor.org/u/tiger_cook)\
**Post date:** [4 December 2024 13:11 UTC](https://community.openenergymonitor.org/t/daikin-altherma-espaltherma-home-assistant-with-openenergymonitor/25057/253 "2024-12-04T13:11:14Z")

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I have been experimenting with ‘Pure Weather Compensation’ ie no external controls.  
It’s been very successful at heating our house maybe a bit too much, our 8kW unit can modulate down and consume a small amount of steady state electric ~300W but the house is still too hot (especially upstairs) even after throttling/balancing the radiators, I guess there is such a thing as a too well insulated house.

So i am now experimenting with a hybrid model and using Home Assistant.

1st I take an average temp downstairs this smooths out human, oven and multiple computer heat directly affecting the single point modoka sensor in one room.

 ![image](https://community.openenergymonitor.org/uploads/default/original/3X/5/b/5bda472146b71341513eb67f38478d11f46fb739.png)

Then I created a Generic Climate entity that has a setpoint, hysteresis, cycle time, and a virtual Switch (a simple helper (input\_boolean))

 ![image](https://community.openenergymonitor.org/uploads/default/original/3X/4/3/43d0ca6ab1c733b5a9ab1657ca0ff055ebf102a4.png)

UI Result and control

 ![image](https://community.openenergymonitor.org/uploads/default/original/3X/0/b/0b064318f871512375b07e2c25ef9e97defcf6ef.png)

Within Node Red I can then trigger the HP on/off via the HACS integration, I also have a simple check state, so it’s does not keep hitting the API.

 ![image](https://community.openenergymonitor.org/uploads/default/original/3X/5/5/550d82c43a9e5cb176e8d50435dd455fb6c75220.png)

Time will tell, but I think the HP will run 24/7 when the outside is 3 or below following the WDC, but when outside is above this the house will get above the hysteresis and turn off the HP.

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