When choosing an appropriate heating system, heating capacity in winter is usually no problem, especially in well insulated and reasonable airtight buildings. More important is the thermal comfort. Draught and temperature differences are the main issues. Aspects such as downdraught and 'cold radiance' have to be prevented. Radiators can compensate for cold radiance, while properly placed radiators and convectors can prevent downdraught.
In cases where heating system can not compensate the downdraught and 'cold radiation', alternatives are needed, like the use of well-insulated glass types in stead of single glazing and even normal double-glazing.
Globally we distinguish the following systems
