In article , martin
writes
no well I'm trying not to!

Think I might investigate David's suggestion of an ordinary heater plus
a thermostatic control. Do you mean fan or radiator type heater David?

Never quite managed the knack of working out the running costs of
heaters and so on. I assume a 2k heater will cost the same whether it's
a fan or a radiator type?

janet

I can't imagine a thermostat that costs UKP189.

--
Janet Tweedy
Dalmatian Telegraph
http://www.lancedal.demon.co.uk

I was referring to a fan heater, and I have been wondering what would happen
if you could fit a fan heater inside a metal tube to give it water
protection. Poor mans version of the £160 + heaters.
In the old days I would have said a 5 Gall can with the ends cut off, but
when did you last see a metal can of that size?

--
David Hill
Abacus nurseries
www.abacus-nurseries.co.uk

On Thu, 29 Jan 2004 22:03:17 -0000, "David Hill"
wrote:

I was referring to a fan heater, and I have been wondering what would happen
if you could fit a fan heater inside a metal tube to give it water
protection. Poor mans version of the £160 + heaters.
In the old days I would have said a 5 Gall can with the ends cut off, but
when did you last see a metal can of that size?

propping up boats in boat yards shortly before a hurricane.
--
Martin

"martin" wrote in message
...
On Thu, 29 Jan 2004 09:47:41 +0000, Janet Tweedy
wrote:

In article , Rod
writes

The latter - the Bio Arizona. What swings it for me is the thermostat.

Well yes but I'm not sure the fact that, at 189 pounds the thermostat is
dearer than the 169 pounds heater, will swing the argument for my
husband. I feel he may think it a trifle expensive! Now if they were
both under 200 then I might consider it. However I am still considering
a hot bench so this would put the cost way over the top.

sigh...... back to the catalogues to find an alternative.

Honeywell made a good intelligent adaptive thermostat for around
UKP30. We have one in our living room.

I can't imagine a thermostat that costs UKP189.
--
Martin
I use a redundant tropical fish stat for my seed hot bench, cheap (£10-20)
they work well and of course waterproof!

--
Charlie, gardening in Cornwall.
http://www.roselandhouse.co.uk
Holders of National Plant Collection of Clematis viticella (cvs)

"martin" wrote in message
...
On Thu, 29 Jan 2004 09:47:41 +0000, Janet Tweedy
wrote:

In article , Rod
writes

The latter - the Bio Arizona. What swings it for me is the thermostat.

Well yes but I'm not sure the fact that, at 189 pounds the thermostat is
dearer than the 169 pounds heater, will swing the argument for my
husband. I feel he may think it a trifle expensive! Now if they were
both under 200 then I might consider it. However I am still considering
a hot bench so this would put the cost way over the top.

sigh...... back to the catalogues to find an alternative.

Honeywell made a good intelligent adaptive thermostat for around
UKP30. We have one in our living room.

I can't imagine a thermostat that costs UKP189.
--
Martin
I use a redundant tropical fish stat for my seed hot bench, cheap (£10-20)
they work well and of course waterproof!

--
Charlie, gardening in Cornwall.
http://www.roselandhouse.co.uk
Holders of National Plant Collection of Clematis viticella (cvs)

"martin" wrote in message
...
On Thu, 29 Jan 2004 09:47:41 +0000, Janet Tweedy
wrote:

In article , Rod
writes

The latter - the Bio Arizona. What swings it for me is the thermostat.

Well yes but I'm not sure the fact that, at 189 pounds the thermostat is
dearer than the 169 pounds heater, will swing the argument for my
husband. I feel he may think it a trifle expensive! Now if they were
both under 200 then I might consider it. However I am still considering
a hot bench so this would put the cost way over the top.

sigh...... back to the catalogues to find an alternative.

Honeywell made a good intelligent adaptive thermostat for around
UKP30. We have one in our living room.

I can't imagine a thermostat that costs UKP189.
--
Martin
I use a redundant tropical fish stat for my seed hot bench, cheap (£10-20)
they work well and of course waterproof!

--
Charlie, gardening in Cornwall.
http://www.roselandhouse.co.uk
Holders of National Plant Collection of Clematis viticella (cvs)

In article , Rod
writes
Which prices are you looking at Janet? What I saw was £210.00 including
thermostat. Got there from the 'Promotions' on the right hand side of the home
page.


No, the thermostats isn't included in the price Rod. The web site says

"This Special Offer Price Of £210.00 (saving £8.95) For A Bio Arizona
2.8KW Heater is available until 29th March 2004 only or whilst stocks
last."
but then spoils it by saying in the text.....
"For accurate temperature control a remote electrical thermostat is
used"

The thermostat is dearer than the heater!

janet
--
Janet Tweedy
Dalmatian Telegraph
http://www.lancedal.demon.co.uk

In article , Rod
writes
Which prices are you looking at Janet? What I saw was £210.00 including
thermostat. Got there from the 'Promotions' on the right hand side of the home
page.


No, the thermostats isn't included in the price Rod. The web site says

"This Special Offer Price Of £210.00 (saving £8.95) For A Bio Arizona
2.8KW Heater is available until 29th March 2004 only or whilst stocks
last."
but then spoils it by saying in the text.....
"For accurate temperature control a remote electrical thermostat is
used"

The thermostat is dearer than the heater!

janet
--
Janet Tweedy
Dalmatian Telegraph
http://www.lancedal.demon.co.uk

Troy wrote:

I think I might have been the original poster on this subject :-)

With hindsight, one of the heaters on the twowests site you suggest would
have suited my purposes - Ah well too late :-(

Follow up to my problem - My *third* parasene 2Kw heater from B&Q actually
nearly works as advertised i.e. I'm almost confident my greenhouse plants
are safe using the "frost protection" setting :-)

Yes it was you I was thinking of. Glad you found one that does the job for you.

--
Rod
http://website.lineone.net/%7Erodcraddock/index.html
My email address needs weeding.

Janet Tweedy wrote:


No, the thermostats isn't included in the price Rod. The web site says

"This Special Offer Price Of £210.00 (saving £8.95) For A Bio Arizona
2.8KW Heater is available until 29th March 2004 only or whilst stocks
last."
but then spoils it by saying in the text.....
"For accurate temperature control a remote electrical thermostat is
used"

The thermostat is dearer than the heater!

janet

I'm sure you've got hold of the wrong end of the stick Janet.
This is pasted from the heading of the heater info.
'Bio Arizona 2.8KW Electric Fan Heater
?remote electronic thermostat for accurate temperature sensing'

I'd be amazed and disapointed if it didn't come complete.

There's also a few other decent looking thermostat offerings on that site that
ought to do a reasonable job with one of the cheapo heaters but you only get
the tighter control the electronic ones. Tight control is imho essential if
you're keeping your temps close to the lower margin for frost damage. Can't
remember where I got the figure from but I was told many years ago that as a
very rough approximation each increase of 5 centigrade degrees roughly doubles
your energy costs. So if you have to widen your safety margin for an innacurate
thermostat it's costing you money every day - not just on the day you buy it.
Just my 2p worth.
--
Rod
http://website.lineone.net/%7Erodcraddock/index.html
My email address needs weeding.

Janet Tweedy wrote:


No, the thermostats isn't included in the price Rod. The web site says

"This Special Offer Price Of £210.00 (saving £8.95) For A Bio Arizona
2.8KW Heater is available until 29th March 2004 only or whilst stocks
last."
but then spoils it by saying in the text.....
"For accurate temperature control a remote electrical thermostat is
used"

The thermostat is dearer than the heater!

janet

I'm sure you've got hold of the wrong end of the stick Janet.
This is pasted from the heading of the heater info.
'Bio Arizona 2.8KW Electric Fan Heater
?remote electronic thermostat for accurate temperature sensing'

I'd be amazed and disapointed if it didn't come complete.

There's also a few other decent looking thermostat offerings on that site that
ought to do a reasonable job with one of the cheapo heaters but you only get
the tighter control the electronic ones. Tight control is imho essential if
you're keeping your temps close to the lower margin for frost damage. Can't
remember where I got the figure from but I was told many years ago that as a
very rough approximation each increase of 5 centigrade degrees roughly doubles
your energy costs. So if you have to widen your safety margin for an innacurate
thermostat it's costing you money every day - not just on the day you buy it.
Just my 2p worth.
--
Rod
http://website.lineone.net/%7Erodcraddock/index.html
My email address needs weeding.

The thermostat is not the accepted crude bi-metal or capillary accessory which are not actual accurate, but worse the settings are not calmly repeatable. Though I don't accept any blueprint for the thermostat a archetypal agenda thermostat will be repeatable and should give tighter control, enabling you to cautiously set the temperature afterpiece to your acceptable minimum; this will save a advantageous bulk of energy.

The 2kw is the maximum output, so in theory they will both be using 2units per hour if they are running at full pelt (because a unit is 1kw for 1hr). What they actually cost depends on how much time they are running, and that depends on your thermostat, and where you put it. And how effectively your greenhouse is heated will depend on how effective the heater is at spreading the heat around the greenhouse, and where your thermostat is. For example, if your thermostat is in a draught from the door, it'll be keeping the heater on a lot longer than needed, whereas if it is just above the heater, it'll be thinking the greenhouse is warm enough when areas further from the heater are still chilly.