You almost sound like you know what you’re talking about but you’re missing the distinction between radiant and convected heat. Simply lining the wall behind a radiator with foil will serve only to reflect radiant heat, mostly back to the radiator and some into the room (radiant heat travels in straight lines so it’s unlikely you’d feel the benefit of this reflected heat unless your exposed skin was in its path, radiant heat does not heat air!) Foil is a very good conductor of heat so any warm air passing will still lose some of the heat, via conduction, to the foil and to the building fabric. The implication that it will cut a rooms heat loss by 50% is frankly absurd.
Your (sic) clearly a genius. Can I interest you in an over unity machine I've just designed? Yes, people "like me" who don't waste the earth's resources on useless tat like this are the main reason we have global warming.... If it's such an effective energy saver, why don't all new builds have this installed as standard behind every radiator? Is it some conspiracy by big oil?
Some benefit to this but not much .. ppl are wrapped in foil so they stay tender and juicy
Not true at all. Like I said it’s SIMPLE physics. The foil bounces the heat back & forth creating a heat pocket behind the rad. Hot air rises...we know this from primary school... so the heat will be FORCED to rise above the pocket / radiator into the room. Don’t believe me test it. Get a small piece of foil and stick it there with a bit of tape ul hear it flapping like a fan. As for new radiators being convectors. Your wrong on 2 points: 1- they are simply not convectors. 2 - even if they were. They are mainly on new builds. They have plaster board cavity walls. So unless you want to warm the cavity you better line it. If your still not getting it, Just think....Why do we use foil to reflect heat? when there is an emergency at the road side people are wrapped in foil blankets.... why? When you smash open a microwave guess what lots of foil. Because it reflects heat and does not absorb it like a brick wall. People like you is the reason we have a global warming problem. Next you’ll say a Tesla uses more oil
I'd love to know where they get the savings figures from...