Space heating
	Downdraught
	Near relative cold surfaces air is cooled down and will descent. People sitting near these cold surfaces will experience an uncomfortable draught. This phenomenon is called downdraught. Placing a radiator or convector beneath the cold surface can prevent downdraught. Due to the strong up going heat airflow the downdraught from the window will be compensated. When high-insulated glazing types is used (U-values below 1,5 or 2,0 W/m2K), downdraught will occur less easily.