Do any of you ladies or gentlemen have any experience with the brand parasene heaters??? I was just curious if they are worth the money and the expensive shipping from across the pond??? I have a 6x8 greenhouse I would like to heat this winter.

Just go down to Home Depot and get the cheapest 1500 watt heater they have, probabaly less that v$20. Regardless of price, almost all are 1500 watts. As long as you don't water it, it will more than heat a small greenhouse. Get a separate fan to circulate the air, or the bottom of the green house will be colder than the top. The little vornado like fans from GE/Honeywell wok great for about $13.

I appreciate the response but the last thing I wanted to do was use an electric heater I don't have power in the greenhouse and don't really want my electric bill to increase.

propane and propane heater

gasoline for the parasene is not cheap  :-)

I used an electric heater like Jon described and ran an extension cord from the garage 50 ft. Don't really remember the electric bill going up much. ( I used a second heater when temps went into the teens and below.) My greenhouse was 7x8. It worked great.

23,000 btu Kerosene heater for around $130 from Home Depot

I once did consider a parasene heater as an emergency heat back-up source for my small 6x10' GH (but I never actually found/got it).

Since day one(1); and for many,many years since, my (~ $100) Vornado heater did an excellent GH job for me, e.g.,
http://www.vornado.com/heaters/AVH2-Heater

Thanks for the responses guys!! Gorgi thanks for the link I just checked it out that's a pretty impressive unit.

I use an electric fan heater like the one Jon recommended and it was not more than $20. It has a thermostat on it and I have not noticed much of a rise in the utility bill. My shed is 10 X 8 and it works real well. I have had this heater for about 5 years now. I keep it set at about 38 degrees (I have a thermometer in the shed and adjust the thermostat to maintain at that temperature range).

I use an electric oil filled radiant heater with a built in thermostat. Heater has 2 settings, one for 750 and one for 1500. I have a thermocube connected to it and the heater switch stays on. When temps drop below 35 degrees the thermocube turns the heater on. When temp reaches 45, it turn the heater off. Paid 35 for the heater an 11 eleven bucks for the thermocube. I also have a wireless thermostat/humidity remote that tells me the current temperature inside my GH every 3 minutes. On some days I do have to open the vent and door to swap air.

Most days, all I do is sit in my easy chair and watch my temperature console checking temps in my GH, shed, and garage.