Delta T. Snake oil methinks. if it sounds too good to be true it probably is.

Fills micro-cavities to make the radiators hotter quicker? I would be interested in the peer reviewed research papers!

Cheers

Dave R

I would imagine that effect would be minimal to non existent and clog up the works in short order. Brian

There might be a small benefit. Similar (and, I think, proven) products exist for car cooling systems, increasing the efficiency of heat transfer from engine to water and water to radiator. Presumably they could do the same for domestic heating, however, I can't see it being of any great help, unless it just happens to get enough extra heat out at the radiators that the return temperature drops enough to let the boiler condense, when it wasn't doing before.

Even if it did fill microcavities, thereby adding another 0.05% of effective radiator space, that does not increase efficiency to a noticeable extent, and has no hope of repaying the £60+vat cost.

It's not comparable to a car rad, which when hot is fanned with great vigour. Primary circuit heat will travel through a quarter inch of steel radiator (if a cavity existed) effortlessly.