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Martin Brown Martin Brown is offline
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Default Radiator reflective foil

On 14/12/2011 13:49, Moonraker wrote:
Does it lose its effectiveness if emulsioned over? This one, though


Of course.

It has to be a mirror surface to be "not a black body" at thermal
wavelengths. Same way that thin metallic coating is used on survival
blankets to get maximum reduction in heat loss for minimum weight.

The way it works to stop heat loss is by being a mirror surface
reflector - and preferably backed with 3-5mm of expanded polystyrene to
insulate it from the cold wall as well. Both play their part here.

expensive looks ideal, any experience here please?
http://www.greenstamp.co.uk/product_...roducts_id/268

Interesting aluminium foil that is magnetic. Ovepriced junk. If you
stick it onto the radiator itself you reduce the convective heat output.

The best buy at the moment are the roughly 60cm square sheets for foil
backed with 5mm of polystyrene in B&Q/Wickes. They mount onto the wall.
See the previous thread for details.

Regards,
Martin Brown