Hello,
The underfloor heating is only on during extreme winter because it is in the bedroom. We were able to get an impression of it, even though the underfloor heating is only 6 years old, it takes several hours until a change is noticeable, best to turn it up in the morning, then you can clearly notice a difference in the evening.
With this user behavior, you pay monetarily for it. You should not change a once set temperature anymore – not even in the bedroom. Since all heat generators today are linked to the outside temperature, they only react when the outdoor sensor reports corresponding degrees. This not only has the nice side effect of saving money but also ensures continuous temperatures "without" long start-up times. Not to mention that cold bedrooms are often the main cause of joint diseases.
I found pictures to illustrate exactly that radiant heat, but unfortunately have not yet experienced it live.
I sold radiant heaters many years ago; unfortunately, in those years the negotiation scope with energy suppliers was not particularly positive because they earned more from gas. Especially RWE opposed granting this system the heat pump tariff. Today, with affordable and additionally subsidized storage media, this is no longer an issue.
Radiant heat is something very pleasant because all solid matter in the room is used, but the room air itself remains cold. Short- or long-term ventilation does not affect the perception of warmth. Furthermore, they heat secondarily, which means incoming solar heat or other heat sources, e.g., baking, cooking, people, etc., are preferred. And – whoever can afford it can have individual radiators custom-made; for this purpose, we involved L. Colani at the time.
I have no experience with cooling, as the carrier – marble – did not allow it. On the other hand, I am not enthusiastic about combination solutions anyway; I much prefer a separate air conditioning unit.
Rhenish regards
