Regulation of underfloor heating, information, advice, discussion

[Lars-Göran Lindström]

Hello.
I have a previous thread here about underfloor heating where I learned a lot, but now I want to learn more.

We have 8 underfloor heating loops from a manifold. This is powered by a geothermal heat pump.

The manifold is fixed, meaning no indoor temperature regulation occurs there. The geothermal heat pump has a thermostat inside and one outside and regulates the house's temperature to the best of its ability.

The supplier of the underfloor heating, including the manifold, sells equipment that makes it possible to regulate each loop individually.
This equipment consists, if I understand correctly, of a Gateway (to which an app can connect), a Base unit, and a thermostat and Actuator for the flow in the loop per room. Functionally, the Gateway communicates with the Base unit, which controls the Actuator.

I hope I understood correctly?

The price for this is.... quite steep.... which makes me consider other solutions leading to the question, do these units follow any type of standard?

The Actuator looks like some type of motor designed to turn an axle. Is this axle coupling standard?
Thermostats, zigbee? I assume the Gateway communicates over wifi, but how does it talk to the Base unit?

I'm curious if it would be possible to build a control system around Home Assistant and standard parts purchased online.

The floor is open.

 

[Demmpa]

Thermostats should only restrict the flow when the room receives extra heat input from sources such as sunlight or cooking. They should also temporarily restrict the flow to a single room where a lower temperature is desired.

A heat pump prefers as even a flow as possible.

For optimal operating economy, there are three main steps that should be taken.
Step 1, adjustment of the presetting on each radiator/floor heating manifold/floor heating loop to ensure "correct" flow/pressure drop/differential temperature across each unit.
Step 2, adjustment of the control center concerning the heating curve (curve slope and parallel shift), preferably with an indoor sensor (which you have). The challenge is finding the "right"/best location for the indoor sensor.
Step 3, possible mounting along with adjustment of thermostats/actuators.

Floor heating manifolds typically have a pin similar to radiator valves.
Yes, it's possible to use HA, etc.

 

[paralun]

Looked at Danfoss Ally and Icon2

Ally
https://www.danfoss.com/sv-se/products/dhs/smart-heating/smart-heating/danfoss-ally/#tab-overview

https://www.vvsochbad.se/danfoss-ally-gateway-traadloest-styrsystem-1145868

Icon2
https://www.danfoss.com/sv-se/products/dhs/smart-heating/smart-heating/danfoss-icon2/#tab-overview

https://www.vvsochbad.se/danfoss-ic...gKWI63omsZsLC8B2RiCATHyBqw9PT39hoCY_YQAvD_BwE

Costs a bit and then I can't really find active HA projects when I search on Github.

Example of a project
https://github.com/MTrab/danfoss_ally

 

[jonaserik]

Hello.
I have a previous thread here about underfloor heating where I learned a lot, but now I want to learn more.

We have 8 loops of underfloor heating from a distributor. This is fed from a geothermal heat pump.

The underfloor heating distributor is fixed, meaning no regulation of the indoor temperature happens there. The geothermal heat pump has a thermostat inside and outside and regulates the house's temperature to the best of its ability.

The supplier of underfloor heating, including the distributor, sells equipment to connect that allows regulating each loop individually.
This equipment consists, if I've understood correctly, of a Gateway (to which an app can connect), a Base Unit, and per room thermostat and Actuator for the flow in the loop. Functionally, the Gateway talks to the Base Unit, which controls the Actuator.

Hope I understood correctly?

The price for this is .... rather steep.... which makes me consider other solutions leading to the question, do these units follow some kind of standard?

The actuator looks like some type of motor that should turn an axle. Is this axle coupling standard?
Thermostats, zigbee? I assume the Gateway communicates over wifi, but how does it talk to the Base Unit?

I am curious if it would be possible to build a control system around Home Assistant and standard parts available online.

The floor is open.

If the heating works now, then forget about all the electronic components, it costs a fortune and breaks down.
You won't recover the money it costs for many years and there's a risk of additional points of failure.
Just read on BH about everyone who has problems with UFH.