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Old 07-02-2005, 08:22 PM
keith ;-\)
 
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Default small Gas heaters Q

I have been running a 2kw electric fan heater in my 10 x 8 greenhouse which
has cost around 120 for two months keeping
it at 60 f min 24/7.It may have been more expensive than it should be
because I have been running the heater through a thermostat controller set
at 60 f min & the heaters thermostat on full and on its highest heat
setting.After receiving my bill I am trying the heater thermostat lower and
the heat setting on one instead of two,I think on one its output is 1.8kw &
2kw on setting two.This has scared me,so thinking of buying a gas heater
supplied with hose & regulator so I think can use bottled gas with it.It has
a variable output upto 4.2 kw,suitable for 20x10 greenhouse & costs 99.95p
Would this be the cheapest to run,also would I require permanent
ventilation.If any one is using bottled gas/heater,any advise is
appreciated.
ps just thinking about gas at the moment(panic reaction!)



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Old 07-02-2005, 08:26 PM
keith ;-\)
 
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Also forgot to ask how long do the gas bottles last?

--
Thanks Keith,England,UK.
"keith ;-)" wrote in message
...
I have been running a 2kw electric fan heater in my 10 x 8 greenhouse

which
has cost around 120 for two months keeping
it at 60 f min 24/7.It may have been more expensive than it should be
because I have been running the heater through a thermostat controller set
at 60 f min & the heaters thermostat on full and on its highest heat
setting.After receiving my bill I am trying the heater thermostat lower

and
the heat setting on one instead of two,I think on one its output is 1.8kw

&
2kw on setting two.This has scared me,so thinking of buying a gas heater
supplied with hose & regulator so I think can use bottled gas with it.It

has
a variable output upto 4.2 kw,suitable for 20x10 greenhouse & costs

99.95p
Would this be the cheapest to run,also would I require permanent
ventilation.If any one is using bottled gas/heater,any advise is
appreciated.
ps just thinking about gas at the moment(panic reaction!)




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Old 07-02-2005, 08:50 PM
Rob Halgren
 
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keith ;-) wrote:
I have been running a 2kw electric fan heater in my 10 x 8 greenhouse which
has cost around 120 for two months keeping
it at 60 f min 24/7.It may have been more expensive than it should be
because I have been running the heater through a thermostat controller set
at 60 f min & the heaters thermostat on full and on its highest heat
setting.After receiving my bill I am trying the heater thermostat lower and
the heat setting on one instead of two,I think on one its output is 1.8kw &
2kw on setting two.This has scared me,so thinking of buying a gas heater
supplied with hose & regulator so I think can use bottled gas with it.It has
a variable output upto 4.2 kw,suitable for 20x10 greenhouse & costs 99.95p
Would this be the cheapest to run,also would I require permanent
ventilation.If any one is using bottled gas/heater,any advise is
appreciated.
ps just thinking about gas at the moment(panic reaction!)



Well, a gas (I use liquefied propane, or LP gas) furnace is certainly
cheaper to run than the equivalent electric heater. I'd hate to guess
how much gas you would use, that depends a lot on the temperature
outside and the type of heater you have.

I'm pretty sure you can get a through the wall heater that runs on LP
gas. For not too expensive. But I don't know if you have LP gas where
you are. Here in the US, it is conceivable that you could run a small
furnace off of the same sort of tank that a barbeque grill might use.
You'd have to fill it up a lot.

If you have gas service from the street (that is usually natural gas,
methane), then there are no problems whatsoever. Just get the
appropriate plumber/heating guy to hook it up and away you go. Just
make sure you get a furnace appropriate to the fuel (propane and methane
aren't interchangeable).

Before I put up the big furnace, I had good luck with a shop heater,
which is a little turbocharged jet engine kind of thing. I have an 120K
BTU model, but they come in smaller sizes (75K?). It burns kerosene,
diesel, or fuel oil, although kerosene is probably cleanest. Comes with
a built in thermostat. It isn't vented, but I didn't run into much of a
problem with it. I kept the vents cracked open a bit. Didn't lose any
flowers.

Now, if you are going to all the trouble of getting gas for your
greenhouse, you may as well switch your home heating to the same fuel.
A new gas furnace or boiler for the house would pay for itself in lower
electricity bills. If you are already using gas for heating the house,
then it is really easy to tap into that for the greenhouse.

Rob
--
Rob's Rules: http://www.msu.edu/~halgren
1) There is always room for one more orchid
2) There is always room for two more orchids
2a) See rule 1
3) When one has insufficient credit to obtain more
orchids, obtain more credit

LittlefrogFarm - Growing the plants Rob likes. )

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Old 07-02-2005, 08:50 PM
Rob Halgren
 
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keith ;-) wrote:
I have been running a 2kw electric fan heater in my 10 x 8 greenhouse which
has cost around 120 for two months keeping
it at 60 f min 24/7.It may have been more expensive than it should be
because I have been running the heater through a thermostat controller set
at 60 f min & the heaters thermostat on full and on its highest heat
setting.After receiving my bill I am trying the heater thermostat lower and
the heat setting on one instead of two,I think on one its output is 1.8kw &
2kw on setting two.This has scared me,so thinking of buying a gas heater
supplied with hose & regulator so I think can use bottled gas with it.It has
a variable output upto 4.2 kw,suitable for 20x10 greenhouse & costs 99.95p
Would this be the cheapest to run,also would I require permanent
ventilation.If any one is using bottled gas/heater,any advise is
appreciated.
ps just thinking about gas at the moment(panic reaction!)



Well, a gas (I use liquefied propane, or LP gas) furnace is certainly
cheaper to run than the equivalent electric heater. I'd hate to guess
how much gas you would use, that depends a lot on the temperature
outside and the type of heater you have.

I'm pretty sure you can get a through the wall heater that runs on LP
gas. For not too expensive. But I don't know if you have LP gas where
you are. Here in the US, it is conceivable that you could run a small
furnace off of the same sort of tank that a barbeque grill might use.
You'd have to fill it up a lot.

If you have gas service from the street (that is usually natural gas,
methane), then there are no problems whatsoever. Just get the
appropriate plumber/heating guy to hook it up and away you go. Just
make sure you get a furnace appropriate to the fuel (propane and methane
aren't interchangeable).

Before I put up the big furnace, I had good luck with a shop heater,
which is a little turbocharged jet engine kind of thing. I have an 120K
BTU model, but they come in smaller sizes (75K?). It burns kerosene,
diesel, or fuel oil, although kerosene is probably cleanest. Comes with
a built in thermostat. It isn't vented, but I didn't run into much of a
problem with it. I kept the vents cracked open a bit. Didn't lose any
flowers.

Now, if you are going to all the trouble of getting gas for your
greenhouse, you may as well switch your home heating to the same fuel.
A new gas furnace or boiler for the house would pay for itself in lower
electricity bills. If you are already using gas for heating the house,
then it is really easy to tap into that for the greenhouse.

Rob
--
Rob's Rules: http://www.msu.edu/~halgren
1) There is always room for one more orchid
2) There is always room for two more orchids
2a) See rule 1
3) When one has insufficient credit to obtain more
orchids, obtain more credit

LittlefrogFarm - Growing the plants Rob likes. )

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Old 08-02-2005, 06:49 AM
JulioF
 
Posts: n/a
Default

Ethylene has been shown to be a problem for orchids. Ethylene is produced by
the combustion of gases such as natural gas and propane. The ethylene
by-product of combustion has been proven to have a negative effect on many
plants. Harmless to humans, but not so with plants.

Venting of propane and other heaters is essential! Orchids, in particular,
need proper venting of the GH. One of the worst heaters for orchid-growing
greenhouses are the vent-free 99.9% efficient propane heaters. Since these
and other unvented heaters generate combustive gases, the ethylene goes
directly into the plant's atmosphere.

Any type of vented heater is better for use in greenhouses. I myself am
partial to the direct-vented models, in which the combustion chamber is
totally separate from the GH interior. Air from outside is brought in for
use in the combustion chamber, with the exhaust being vented out, both
usually in a concentric pipe configuration which partially warms the
incoming air prior to combustion.

In my opinion, the extra $300-$600 for such a heater as opposed to a
nonvented heater is well worth the improved health and appearance of our
flowers and vegetables.

Follow the link and read carefully. Best of gardening to you! :-)

Here is a link that might be useful:
http://www.ces.ncsu.edu/depts/hort/f...p_ethylene.htm


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Old 05-10-2011, 02:35 PM
Registered User
 
First recorded activity by GardenBanter: Oct 2011
Posts: 5
Default

This has afraid me,so cerebration of affairs a gas heater supplied with corrupt & regulator so I anticipate can use bottled gas with it.It has a capricious achievement upto 4.2 kw,suitable for 20x10 greenhouse & costs 99.95p Would this be the cheapest to run,also would I crave permanent ventilation.


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