So if the beams are used in the spaces with high heat loads, the special attention should be payed to avoid draught problems in the occupied zone.
In hot and humid conditions the designers shoul pay a special attention to the risk of condensation. The supply air must be dehumidified so that the room air dew point in all conditions is lower than inlet water temperature.
The risk is highest in the early morning when ventilation has been shut off during the night and building might be full of humid air. This is why the ventilation system should be switched on before the cold water starts to run in the pipe work. It is also recommended to pressurise the building slightly to avoid infiltration of humid outdoor air through the building structures.
With displacement ventilation system the highest cooling out put in relatively low spaces (<4 m) is a. 40 W/m2. Higher cooling requirement increses the primary air flow rates to be much higher than with traditional mixing systems.
Source
Building Sustainable Design