ᐅ Is Concrete Core Activation Practical for a Slab Foundation in a Bungalow?

Hello,

I am currently planning a bungalow without a basement (168sqm (1810 sqft)) with a heat pump. The exterior facade is almost entirely glazed, resulting in a high U-value for the overall building. The heat load calculation shows that thermal activation of the concrete core in the ceiling does not provide enough capacity to heat the rooms above 20 degrees Celsius (68°F) during winter; it will probably be even cooler near the windows. So far, I have planned to include underfloor heating as an additional heat source. There is also some input on this topic here in the forum. Alternatively, I am considering thermal activation of the concrete core in the slab.

Question: Does anyone have experience using thermal activation of the concrete core in the slab instead of underfloor heating? What are the advantages and disadvantages? What should one pay attention to?

Thanks for your input