Convectors or underfloor heating?

Hello dear forum members,

I am planning the construction of a single-story Kfw 70 house, with 110 m² floor area. The construction company offered me a gas condensing boiler with a solar hot water system, a 300 l tank and 4.6 m² collectors. In addition, there is a central controlled residential ventilation system with heat recovery.

The recommendation (from the construction company) is a underfloor heating system, but I have also requested offers for convectors in parallel. The reason is, on the one hand, my disbelief that underfloor heating now works flawlessly (you read so much...:(), and on the other hand the special situation of the living room, whether an underfloor heating makes sense there:

The living/dining room has 38.4 m² with an adjacent open kitchen of 10.7 m², and a large window front (triple-glazed) facing southwest (greenhouse effect). See also floor plan. Furthermore, the ceiling (at least in the living/dining room/kitchen) is room-high, i.e. up to the ridge of the roof.

Furthermore, I want to install a small, simple wood-burning stove that is rather for romantic reasons.

If the underfloor heating works properly, and I additionally turn on the stove, it will presumably be too warm. And since the heating reacts slowly, it will probably only turn down when the stove is already off again. Due to the high glass proportion, and the associated greenhouse effect, the underfloor heating will presumably also get confused (?), sometimes the sun shines one day, then not the next, how is the underfloor heating supposed to compensate that?

Well, otherwise I still have a house dust allergy, and want to lay parquet flooring.

Due to the overall situation described, I am undecided whether I might draw the wrong conclusions out of ignorance, and decide (wrongly) against underfloor heating. I would appreciate your opinions.

Best regards

Peter

Hello,

... The house construction company offered me a gas condensing boiler with a solar hot water system, 300 l storage tank and 4.6 m² collectors.

I have hardly any confidence in solar thermal systems in single-family homes to this day! I would rather take advantage of the 15% rule (better insulation) and do without the solar thermal system.

... One reason is my disbelief that underfloor heating now works flawlessly (you read so much... :(), ...

With exact dimensioning, underfloor heating works flawlessly!

... how is the underfloor heating supposed to compensate for that?

To a certain extent, it can (self-regulating effect).

... I might be drawing the wrong conclusions and (wrongly) deciding against underfloor heating.

Both are possible. Additionally, user behavior should be taken into account. With heating ad libitum, plus frequent and sporadic external heat input, the decision for radiators is not wrong! Moreover, due to parallel heat emission, if properly connected, there are clear advantages in the predominant partial load range and during heating-up processes.

Best regards

Hello,

we also have a quite large window front and underfloor heating. Additionally, an air heat pump with a ventilation and exhaust system with heat recovery. When the sun shines, it also gets quite warm here, then you have to lower the blinds, otherwise you can't stand being in the room. We also have a small gallery and the heating manages everything. It is nice and warm in the house. We don't have the small fireplace stove yet, but we want one, just like you for the sake of romance.
Keep in mind, if you take radiators, they also take up space. With underfloor heating, you have all the walls as usable space.
Best regards
Christine

Hi!

Doesn't the risk of overheating get resolved by the terrace roof?

Otherwise, we built very similarly. Based on previous experience, I would at least reconsider the 300-liter solar storage tank. It takes up a lot of space for us, much more than the 200-liter tank our neighbors have, can apparently only be heated against salmonella in the upper area, etc.

As for the underfloor heating, we decided against it, among other things because I wanted to install parquet flooring (throughout the whole house) floating. That simply reduces efficiency, the whole system reacts even slower, and I don’t have a problem with cold feet on wood flooring anyway.

Best regards,
TomTom.