There are two basic categories of pipe systems: one-pipe and two-pipe sytems. The type of system installed will have an influence on dimensioning radiators and piping. A general characteristic of a two-pipe system is that the radiators are dimensioned for the same flow temperature and the same temperature difference.
UV water treatment
UV treatment of water is a common method of combating microorganisms. This procedure treats only bacteria that passes the UV bulb and should be regarded as a gatekeeper. This procedure gives no long term protection.
Variable frequency drive
A variable frequency drive is used for adjusting a flow or pressure to the actual demand. It controls the frequency of the electrical power supplied to a pump or a fan. Significant power savings can be achieved when using a VFD.