Underfloor Heating & Radiator Control: Single vs Multiple Sensors, Two-Story House Setup

Hello,

I am asking for help in the following matter, in my two-story house with an attic, I have floor heating downstairs, in the upper corridor and in the bathrooms, while in the upper rooms heaters controlled manually. The plumber said I would have one floor controller in the room upstairs. As I talked with friends, they have such controllers in each room with a temperature sensor. I returned to the plumber with it and he says that since there is a floor and heaters, one sensor is enough and it must be in a room where there is NO floor.
I don't know anything about it, but it's logical to think it's better for the oven controller to calculate something like an average than to operate on the basis of data from one point. What, for example, when in this room where the sensor is open a window is opened in winter and let's forget to close it for the whole day?
The heating is gas on a condensing boiler with a DHW tank, 2 floor distributors at the bottom, radiators at the top, at the floor distributor there is a pump and probably a four-way valve. The house is small, 98 sq m, please advise how to control it according to the art.

What 4d valve? Show pictures of a floor distributor with a pump and this 4d valve.
It is not known how the installation is made and what controls the 4d valve. do you have cylinders mounted on the floor?

Unfortunately, at the moment I don't have a photo to add in a few hours,

As for the cylinders, I certainly don't have it, there should also be manual control, the plumber said that with such a small house, where there is a floor and radiators, there is no point in "playing" the automation of the floor on the cylinders.

If you don't have servomotors and automation, what do you need a controller for in every room? The floor should have a 3d valve instead of a 4d valve. and one thermostat in a representative room where there is a floor, and for radiators the controller also in the coldest room. This should be connected by a suitable boiler module. Something seems to me the next batch. Take photos of what you have and how the boiler and installations are connected.

Above, a photo of the floor divider, photos of laid pipes will not even be posted because it is such a "spider" that you will not understand anything.
The boiler is not there yet, only the guides are made.

I will add that the boiler will be Ariston single function with an additional container but I don't know which model it should be "as it will fit"

In my humble opinion, first of all, it should be a 3d valve because the condensing boiler will have greater efficiency if the temperature difference between the flow and return is greater and the 4d valve increases the return temperature. Then you do not have cables to the distributor box so control from each room falls off. You can only use turn on turn off the floor heating pump depending on the temperature in the room with the floor. This is a bad solution because the floor has a large inertia. In your case, there is a thermostatic valve on the floor and before you will have to change the heating water temperature settings. You must check if the dedicated controller for this boiler can support an additional pump. In a word, installation sucks a little.

A colleague from another forum advised me to take an interest in the hydraulic clutch - I read and it looks like a brilliant trouble-free solution with only advantages, would it be advisable to install such a miracle in my situation?

The coupling, 3d valve with underfloor pump and radiator pump can be connected to the boiler. Your installation is done. Do the manifold pipes go separately? if so, it is possible to mount the clutch. However, if the manifold is connected to a radiator system, this is not possible unless you pull new pipes, from the coupling to the manifold.
That's how it should be;
http://www.tanie-ogrzewanie.pl/img/produkty/_...kompletna_kotlownia_vaillant_to13_schemat.jpg
http://www.budujemydom.pl/i/images/8/8/5/dz01MDAmaD0zMDE=_src_185885-instalacja2.jpg
http://migel.pl/static/img/5/2/1.JPG

At the moment only the connection to the floor distributor is made (it is located in the boiler room but on a different wall in relation to the furnace) and the pipes from the radiator manifold are drained - all pipes are simply led to the place where the boiler will be and "waiting" loose.

The diagrams you have provided indicate that the most possible when connecting the furnace could be such a valve in terms of technical capabilities. It would be enough to add a pump at the floor distributor because it is not there.

The only question is whether this solution is justified and whether something would improve / improve?

The pump should be at the clutch and not at the distributor. In other words:
Boiler> clutch> radiator pump
> 3d valve and floor pump> floor heating manifold.

OK, but anyway, it can still be done quite easily, but is it worth it? What pros can I count on compared to the current solution?

Better control of heating circuits (radiators and underfloor) and independent operation, i.e. underfloor heating, will not depend on whether the radiators will heat or not.

The forum vending machine asked me for a comment on how I solved the problem what I am doing here.

Well, I finally changed the plumbing and now I know that the only right solution for two different heating circuits (radiators and underfloor heating) is to use a hydraulic clutch and two separate pumps with controllers

I currently have:
Buderus gb072 14kw boiler + rc300 + rc100 controller + 2x MC100 modules + weather station + 3d valve with mixer
system distributor with a hydraulic clutch
2x grundfos alpha 2L pump
acv comfort 100 tray (really mega efficient I am surprised)

Old pump and 4d valve went out (for sale at a good price if someone wanted)

Maybe this is not the most important thing, but everything looks nice and professional, it was done on galvanized pipes and compression fittings (for low-temperature boilers are OK). As I now look at the boiler rooms of neighbors where everything is on pex pipes, which stick out from the floor and around the boiler and the container there is one big spider from cables and pipes, I do not regret a single zloty spent.

And such an installation can be controlled as much as you want, good advice for all laymen who, like me at the beginning, do not understand what these plumbers are saying to you at all - find a good plumber (I hate such moron advice hehe and don't regret modern solutions.
Now I would go even further and do something else. Heaters are unnecessary, with a well-insulated house (and now all new should be well insulated) 100% underfloor heating - the boiler room gets much simpler and cheaper, which would make me use even better things: a ready pump group + a nice distributor (e.g. afriso) + actuators.

But that's all when I will build the next house, although then they will probably come up with wireless heating

EDIT: aha and remember about recuperation !!
I will give the prices: my boiler room about 16 thousand, the same amount of recovery.

Greetings and I wish you a Merry Christmas.