if i,m having a mega flow un vented system installed, is this classed as a closed sytem. A radiator i,m looking at buying for bathroom says only for closed heating systems?
Er no,the megaflo is for domestic hot water,the heating system warming it could be open vented, sealed(closed), semi sealed.
You would get a better answer if you posted make and model of boiler,And gave an answer to
Do you have a filling loop by whic you top your heating system contents up or a small tank in the loft.
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