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#1
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heating a mini polythene greenhouse
I received a small 3 tier polythene greenhouse for xmas and want to use
to grow some seeds of which I have many this year. I put it up and check the temp in it and it was only around 7c at approx 4 pm in the afternoon. If I put seeds into unheated propogators with this greenhouse will this be sufficient for them to grow or will it be too cold at the moment ? I was trying to get some sweet pea seeds going before it's too late and the apparently only need around 10c - 15c I was also going to grow geraniums in a heated propogator which I can plug in and leave in the green house as it has an electric point right next to it. or should I look at some sort of heating for the greenhouse but given that it is small and polythene what would be suitable to heat it with. I am trying to keep the seeds outside in the new greenhouse to protect them from my wife and children who don't give them as much regard as I do !!! suggestions please or do I just need to wait until it's warmer to use these greenhouse ? |
#2
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heating a mini polythene greenhouse
Gardening_Convert wrote:
I received a small 3 tier polythene greenhouse for xmas and want to use to grow some seeds of which I have many this year. I put it up and check the temp in it and it was only around 7c at approx 4 pm in the afternoon. If I put seeds into unheated propogators with this greenhouse will this be sufficient for them to grow or will it be too cold at the moment ? I was trying to get some sweet pea seeds going before it's too late and the apparently only need around 10c - 15c I was also going to grow geraniums in a heated propogator which I can plug in and leave in the green house as it has an electric point right next to it. or should I look at some sort of heating for the greenhouse but given that it is small and polythene what would be suitable to heat it with. I am trying to keep the seeds outside in the new greenhouse to protect them from my wife and children who don't give them as much regard as I do !!! suggestions please or do I just need to wait until it's warmer to use these greenhouse ? A tube heater? Usually 60W or 100W. Such as this...... http://www.cnmonline.co.uk/Tubular-Heating-c-213.html HTH -- ßôyþëtë |
#3
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heating a mini polythene greenhouse
BoyPete wrote: Gardening_Convert wrote: A tube heater? Usually 60W or 100W. Such as this...... http://www.cnmonline.co.uk/Tubular-Heating-c-213.html HTH -- ßôyþëtë so it would just be the cost of a light turned on 24-7? How much does that equate to I wonder? Judith at home in England |
#5
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heating a mini polythene greenhouse
BoyPete wrote: wrote: so it would just be the cost of a light turned on 24-7? How much does that equate to I wonder? Judith at home in England Obviously it depends on your energy supplier and wattage,, but around £1.20 a month for 'a light bulb'. Info courtesy of Google. -- ßôyþëtë I wonder if you could use the low energy bulbs making that around what, say 50p a month. I have a Halls greenhouse, I think its about 8 x 8. My new paraffin heater blew up and I don't want another. Would 2 x low energy, 100 watt bulbs be adequate to heat the greenhouse so that I could use it now? Judith at home in Norwich |
#6
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heating a mini polythene greenhouse
wrote:
BoyPete wrote: wrote: so it would just be the cost of a light turned on 24-7? How much does that equate to I wonder? Judith at home in England Obviously it depends on your energy supplier and wattage,, but around £1.20 a month for 'a light bulb'. Info courtesy of Google. -- ßôyþëtë I wonder if you could use the low energy bulbs making that around what, say 50p a month. I have a Halls greenhouse, I think its about 8 x 8. My new paraffin heater blew up and I don't want another. Would 2 x low energy, 100 watt bulbs be adequate to heat the greenhouse so that I could use it now? Judith at home in Norwich No, the electricity is 'used' to create light. The tubes I spoke of use all the electricity to produce heat. Do you remember the old style portable heaters that used a long coil of wire that glowed red?....similar concept, but safely enclosed. -- ßôyþëtë |
#7
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heating a mini polythene greenhouse
BoyPete wrote: No, the electricity is 'used' to create light. The tubes I spoke of use all the electricity to produce heat. Do you remember the old style portable heaters that used a long coil of wire that glowed red?....similar concept, but safely enclosed. -- ßôyþëtë Ah, now I understand, I wonder how much heat I would need for my sized greenhouse, and whether, say 1 large or 2 small ones would be adequate. I looked on the link you gave, but it didn't give heat output, AFAICS. Judith at home in Norwich |
#8
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heating a mini polythene greenhouse
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#9
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heating a mini polythene greenhouse
In article ,
"BoyPete" wrote: wrote: BoyPete wrote: wrote: so it would just be the cost of a light turned on 24-7? How much does that equate to I wonder? Judith at home in England Obviously it depends on your energy supplier and wattage,, but around £1.20 a month for 'a light bulb'. Info courtesy of Google. -- ßôyþëtë I wonder if you could use the low energy bulbs making that around what, say 50p a month. I have a Halls greenhouse, I think its about 8 x 8. My new paraffin heater blew up and I don't want another. Would 2 x low energy, 100 watt bulbs be adequate to heat the greenhouse so that I could use it now? Judith at home in Norwich No, the electricity is 'used' to create light. The tubes I spoke of use all the electricity to produce heat. Do you remember the old style portable heaters that used a long coil of wire that glowed red?....similar concept, but safely enclosed. Heck, all the electricity ends up as heat anyway. If its a transparent polytunnel then maybe some of the light will escape and not heat the tunnel but even in an energy efficient bulb most of the power goes directly to heat without going through light first. So if you use a low energy bulb it will simply produce less heat. I don't know how big the polytunnel is - or how well insulated (is it bubblewrap lined?) but I get the feeling that 100 watt wouldn't make much difference to the temperature. Most greenhouse heaters are 2kilowatt and up. There's some nice thermostatically controlled heater tape thats intended for underheating beds and greenhouse staging. However, its a nice warm winter this year. |
#10
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heating a mini polythene greenhouse
wrote in message ups.com... BoyPete wrote: Gardening_Convert wrote: A tube heater? Usually 60W or 100W. Such as this...... http://www.cnmonline.co.uk/Tubular-Heating-c-213.html HTH -- ßôyþëtë so it would just be the cost of a light turned on 24-7? How much does that equate to I wonder? And, the cost of a light bulb, would be considerably cheaper than a heater, and would do exactly the same job! Alan |
#11
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heating a mini polythene greenhouse
wrote in message ps.com... BoyPete wrote: wrote: so it would just be the cost of a light turned on 24-7? How much does that equate to I wonder? Judith at home in England Obviously it depends on your energy supplier and wattage,, but around £1.20 a month for 'a light bulb'. Info courtesy of Google. -- ßôyþëtë I wonder if you could use the low energy bulbs making that around what, say 50p a month. I have a Halls greenhouse, I think its about 8 x 8. My new paraffin heater blew up and I don't want another. Would 2 x low energy, 100 watt bulbs be adequate to heat the greenhouse so that I could use it now? No, because low energy light bulbs do not use the number of watts which are shown on the case, that is a guide to the relative light output, the power consumpton is much lower, about 20 watts for a light output of 100 watts. In the case you mention, the heat output of two bulbs would be only 40 watts. Alan |
#12
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heating a mini polythene greenhouse
Gardening_Convert wrote: I received a small 3 tier polythene greenhouse for xmas and want to use to grow some seeds of which I have many this year. I put it up and check the temp in it and it was only around 7c at approx 4 pm in the afternoon. If I put seeds into unheated propogators with this greenhouse will this be sufficient for them to grow or will it be too cold at the moment ? I was trying to get some sweet pea seeds going before it's too late and the apparently only need around 10c - 15c I was also going to grow geraniums in a heated propogator which I can plug in and leave in the green house as it has an electric point right next to it. or should I look at some sort of heating for the greenhouse but given that it is small and polythene what would be suitable to heat it with. I am trying to keep the seeds outside in the new greenhouse to protect them from my wife and children who don't give them as much regard as I do !!! suggestions please or do I just need to wait until it's warmer to use these greenhouse ? I am using the following type of greenhouse , so what is suitable for this ? http://www.gardman.co.uk/asp/product...reenhouses.asp Cheers Colin |
#13
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heating a mini polythene greenhouse
Alan Holmes wrote: No, because low energy light bulbs do not use the number of watts which are shown on the case, that is a guide to the relative light output, the power consumpton is much lower, about 20 watts for a light output of 100 watts. In the case you mention, the heat output of two bulbs would be only 40 watts. Alan Thank you Alan Judith at home in England |
#14
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heating a mini polythene greenhouse
wrote in message ps.com... Alan Holmes wrote: No, because low energy light bulbs do not use the number of watts which are shown on the case, that is a guide to the relative light output, the power consumpton is much lower, about 20 watts for a light output of 100 watts. In the case you mention, the heat output of two bulbs would be only 40 watts. Thank you Alan Not at all, anything for a lady! Alan |
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