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- 27 Jan 2008
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Inferred heats any object which it does not pass through, so ones body is heated, as is the furniture in the room, but it is line of sight. This means it is very hard to regulate the heat from it, also as soon as it is switched off, heat stops, so you can't control using the mark/space idea which is used with conventional wet central heating. It is used on its own in churches and garages, where the time the heating is required is short or the air changes are high like when one opens a garage door.
However using with conventional rather than instead then it can work, instead of setting air temperature at 20°C set it at 18°C when the lights are on and personnel will still feel as warm as when air temperature is 20°C.
Since our normal life tends to involve doing some work in the home during daylight hours and sitting watching TV at night, having the room feel 2°C warmer at night works well, no need to have programmable thermostats to raise the temperature at night. We have used that method of adding extra heat at night since central heating became popular.
But with the change from tungsten to LED bulbs, the simple thermostat no longer does what is required, so today we see Hive, Nest, EvoHome and many other systems which can vary the heat in the rooms according to the time of day becoming more and more popular.
So as lighting changed so the central heating controls have had to also change to embrace those changes. The same is true in reverse for the auto stepping auto transformer, it did work years ago, but does not work today. As I said before these energy saving devices have to be looked at together, not in isolation.
It is no good putting a vented tumble dryer in an unheated warehouse and measuring how much electricity it uses to dry a standard set of cloths. What one has to do is add to it the average energy used to heat the air it pumps out of the house. If it costs x pounds in the winter to heat y litres of air, and z pounds in summer to heat or cool y litres of air then one has to find the average summer and winter to heat or cool y litres and add this cost to the direct cost. The problem is all houses are not the same, so one would have to select a house in the centre of the country at average hight above sea level. This would give one an average correction figure, but not the figure relating to any house.
However at least the auto transformer unit manufacturer did try to get some real figures, the people selling LED lights, and vented tumble driers have done nothing to prove if the theory is true or false. They just keep saying it will save money, and think if they say it often enough people will believe it.
There are many adverts which if one looks at them don't make sense. The idea for example that companies guess how much gas and electric you have used, they may take a standard amount from your account as this is easier than working it out every bill, but it has nothing to do with lack of smart meters, they can hold sums of money from one bill to next even when the meter has been read, so why should this stop with smart meters?
However using with conventional rather than instead then it can work, instead of setting air temperature at 20°C set it at 18°C when the lights are on and personnel will still feel as warm as when air temperature is 20°C.
Since our normal life tends to involve doing some work in the home during daylight hours and sitting watching TV at night, having the room feel 2°C warmer at night works well, no need to have programmable thermostats to raise the temperature at night. We have used that method of adding extra heat at night since central heating became popular.
But with the change from tungsten to LED bulbs, the simple thermostat no longer does what is required, so today we see Hive, Nest, EvoHome and many other systems which can vary the heat in the rooms according to the time of day becoming more and more popular.
So as lighting changed so the central heating controls have had to also change to embrace those changes. The same is true in reverse for the auto stepping auto transformer, it did work years ago, but does not work today. As I said before these energy saving devices have to be looked at together, not in isolation.
It is no good putting a vented tumble dryer in an unheated warehouse and measuring how much electricity it uses to dry a standard set of cloths. What one has to do is add to it the average energy used to heat the air it pumps out of the house. If it costs x pounds in the winter to heat y litres of air, and z pounds in summer to heat or cool y litres of air then one has to find the average summer and winter to heat or cool y litres and add this cost to the direct cost. The problem is all houses are not the same, so one would have to select a house in the centre of the country at average hight above sea level. This would give one an average correction figure, but not the figure relating to any house.
However at least the auto transformer unit manufacturer did try to get some real figures, the people selling LED lights, and vented tumble driers have done nothing to prove if the theory is true or false. They just keep saying it will save money, and think if they say it often enough people will believe it.
There are many adverts which if one looks at them don't make sense. The idea for example that companies guess how much gas and electric you have used, they may take a standard amount from your account as this is easier than working it out every bill, but it has nothing to do with lack of smart meters, they can hold sums of money from one bill to next even when the meter has been read, so why should this stop with smart meters?
