To overcome the ambient cold of our home (very poorly insulated) I am offered an oil-bath radiator, explaining to me that it is ultimately the most efficient ... and presto, I ask gougueule's opinion.
I found an interesting discussion that re-establishes the truth in this jungle of slogans from comfort merchants who are starting to exhibit their new innovative and revolutionary heating products.
Here are some selected pieces from the debate:
Radiant heaters
A little technique to avoid arguing about performance based on a commercial quality that means nothing. These are the ones found on the advertising brochures intended to abuse people's credulity.
All electric heaters that operate by Joule effect work very well. They are all approved for safe operation.
A radiator how it works is a simple reminder! !
At one time of the year, if it is necessary to dissipate 2 kW-h to maintain an ambient air of 21 ° C in a room, all the radiators or other electrical devices will do the job as long as they dissipate 2 kW-h .
It is possible to use a low-end convector, and other oil, ceramic, storage radiators, cast iron blocks, heat transfer fluids, heat pipes.
The same result will be obtained with irons, baking trays, toaster bars provided that they dissipate 2 kW-h.
In electricity when we dissipate 2 kW-h we consume on the meter 2 kW-h.
As far as heating performance is concerned, there is no point in using high-end radiators.
All radiators transmit heat according to three main phenomena. Thermal radiation, natural convection and forced convection when there is ventilation.
The accumulation which one sells on certain radiators is in fact interesting only to exploit the naivety of people.
However, radiators which have a large thermal mass often have large, insulated exchange surfaces and operate at lower temperatures. They are also often more aesthetic. But I insist heavily, radiators only provide the energy they consume. No manufacturer displays it in the pub. They let shine by pseudo scientific explanations that the yield is better but it is false. It's just to deceive people.
Conclusion:
If you just want to heat your house you can use low-end convectors certified NF. It will cost you around 40 Euros for a 2000 Watt h radiator
If you want to be ripped off you can use very high end. It will cost you around 1500 Euros for 2000 Watts h. 40 times more, a straw! ! !
If you want to know the reality of the accumulation here are explanations: The specific heat of the ceramics, fluids and metals used vary roughly between 1 and 2 calories to raise by 1 ° C a gram of matter.
To raise a 30kg (20g) radiator from 20 ° C, you need a maximum of 000 calories or 600 kcal. Knowing that a kW h = 000 kcal the radiator can store around 600 kW or 860 watts. When a 0.7 kg radiator consuming 700 kWh is connected, it will restore within the first hour 20 - 2 = 2000 watts-h and not 700 watts. When you disconnect the same radiator, it will dissipate what it has garnered, that is to say the 1300 watts. It is easy to see in a scientific way that the heat balance is equivalent to a simple convector.
..the oil baths are low temperature convectors, so just a little comfort. Otherwise 2kw is 2kw ... A beamer is only interesting ON CONDITION to be seated in front, so in practice, there is only one in front of the sofa in front of the TV ... So it's not with that we reduce our bill by choosing radiant. ...
What is really effective in limiting the cold wall effect is simply the choice of wall covering ... A wooden covering is warm, a coating (even lime) is cold ...
The full discussion is there: http://forums.futura-sciences.com/habitat-bioclimatique-isolation-chauffage/347819-radiateur-a-bain-dhuile-interessant.html