powerstation wrote:
"Harry Bloomfield" wrote in message
...
It happens that Alec formulated :

Morning All. I have a 2m X 6m UPVC conservatory with warmup under tile
heating. Although this warms the floor well and takes the cold edge out
of the room it isn't warm enough to keep the conservatory doors open
into the house so it isn't getting much use during the winter. I would
like to use a free standing heater on a timer so I can set it up to run
at the same time as the central heating so the room is still part of
the house (if you know what I mean). So I really would like to know
which type of heater would be the cheapest to run. I have been leaning
toward oil filled but I may be wrong am I ?

A 3Kw oil filled heater, or a 3kw fan heater, or a 3kw radiant heater will
all cost exactly the same amount to run.

If they are energised for the same length of time

But the oil heater will need to be on for longer to bring the room up
to a given temp, and will then give out that stored heat after switch
off. Oil filled heaters are also the largest and highest purchase cost
option.

If youve got space outside, an area of silvered mylar film on a frame
could get a lot of sunlight in there, and is a cheap but not that
pretty way of solar heating to extend your season.

If your conservatory is single glazed, secondary glazing could enable
you to not need the extra heating. Roller blinds loaded with plastic
film are a low cost tidy way to do this. Mylar is longer lived than
polythene.


NT