"michael adams" wrote in message
...

"Easynews" wrote in message
. ..

Apologies if this is a recurring post and I haven't looked through past
posts properly.
I am trying to decide which electric heater to buy for a fairly big
greenhouse (18' x 10') but a quick look at TwoWests catalogue shows 9
different heaters which vary from £41 to £259, and I can't see what is so
different about them to warrant the huge price difference. The choices
are
(a) tubular heaters which fair enough are different, (b) fan heaters with
tubes (c) fan heaters without tubes. Has anyone any recommendations? I
don't
really have roof space to hang a heater, it will need to go underneath
the
benches, and I just want to keep the temp. through the winter at 8 to 10
degrees C. Heaters would not be used in summer.
The greenhouse is well insulated.
Many thanks!
Paul

What are you intending to grow overwinter in an 18 x 10 greenhouse
that you need to heat it to 8 to 10 degrees ?

I'm asking that question because most people work the other
way around. They decide on what they're going to use the
greenhouse for over winter, on the basis of how much its going
to cost them in heating terms.

Have you actually worked that out?


michael adams

...

Hi Michael, yes, I know what I want to use the greenhouse for- as for the
cost of running, it is a hobby, hence does not have to be profitable or
particularly cost-effective- and there shouldn't be much difference in the
running cost of heaters with the same power rating (or correct me if I'm
wrong there?) The temperature I want is based on what is comfortable to work
in for long(ish) periods, rather than what is going to be grown, but also a
safe temperature for some insects that are more used to the Mediterranean.
There is also the option of just heating one part of the greenhouse, which
has a partition - but I need some help choosing a heater / type of heater. A
Frostshield 3kW fan heater with thermostat costs £50; a Bio Nevada 3kW fan
heater (with a thermostat & tube) costs £260. A Camplex 3kW fan heater with
thermostat costs £120. Apart from the shape I'm having trouble seeing the
benefits / disadvantages.