Panel heater - less than half price

quoia

Sorry quoia,
not wishing to be pedantic, but....radiators dont have to glow to radiate
They just have to be "hot" ::)
Where does black heat come from?
Scat

Yes SCat, I know this, and realised my statement was not strictly true as I was typing out the previous post.

The point I was trying to make was that anything designed to exchange heat to a cooler enviroment where it is the serious intention to use the radiation method in a really major way WILL GLOW.

This is because unless it is really hot more heat will be dissipated through conduction and convection than the less efficient radiation of a "cool body"

For example I am sitting just about 6 feet away from a very large radiator (central heating type - metal container full of very hot water - too hot to put your hand against for more than 4 or 5 seconds) that I know has a heat output of well over 1 kilowatt and yet I cannot actually feel (directly detect) any of the heat it is giving out from where I m sitting. Most is escaping by conduction to the air in contact with it which is convecting away from it because it is hotter and so rises towards the ceiling. Very "little" radiation.

However if I move to sit 6 feet away from the gas fire that is on its lowest setting with only the central element in use, which is less than 1 kilowatt output, I can feel the heat from the fire on the side of my face that is towards it.
This is due to the relatively high level of radiated heat being directed towards me.
The ceramic "radiation" elements have hundreds of little pimples that are glowing a very nice shade of orange.

I can quite easily "feel" this even though much of the almost 1kW of heat is still escaping from the hot metal work by conduction and even more by convection through the air vents in the gas fire that are specially designed to draw cool air in at the bottom and force hot air out at the top.

The point is the gas fire is designed to have a high radiation output and to do this is has to "glow".

zcaprd7

Indeed - what we call radiators should really be called convectionators...

Roger_Rampant

our electric bill litterally went through the roof in winter time.

Sounds as if you had a hole in your roof then!

PINGA14

can you confirm if this model being sold is a per this photo?? it is a slimline model?

http://www.argos.co.uk/wcsstore/argos/images/4158044A60IFN107073M.JPG

thanks

I bought the 650w yesterday and it does look the same as your link picture but it's from Index not Argos.