Your very right about our greenhouses not being a normal hobby houses.
But many people up north should look into different heat sources for
there greenhouse as the wood burning furnaces are making a big impact up
north and here in many buisnesses. Natural gas is so high it is very
expensive to heat a nice size greenhouse for a whole winter. With a
furnace which is basically a stove with a internal shell around the
burning area full of water heats the water to 180f the water is pumped
through the floor of the greenhouse in pipes and heats the ground temp
to whatever temps your after. The smaller setups are a few thousand
bucks but should pay for themselfs in the long run.
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