It should be remembered that the heated floors give warmth in the downward direction (approx. 10%). This heat flow should be considered when determining the total flow of water in the PEX radiant heating system, as well as the selection of the heat source.
In areas with particularly high demand in the warmth associated with a high degree of external walls and surfaces of windows, you can design the coastal zone to meet the boundary values.
Coastal zones, covering more than 20% of the total heated surface, or with the size of more than 6 m2 should be joined with the distributor as a separate circulation. In the case of smaller coastal zones can be projected so-called. integrated coastal zone.
Then, according to the table provided below, depending on q [W/m2], it is necessary to determine the stacking step of PEX radiant heating loops.