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In cold climate it might not be so much more energy because greenhouses need to be heated in winters and it takes a lot of energy too. For instance 2kW heater i
by ivanhoe 8y ago
In cold climate it might not be so much more energy because greenhouses need to be heated in winters and it takes a lot of energy too. For instance 2kW heater is not much, compared to a 2kW light fixture which is like 5 strong led consoles that can grow a lot of lettuce (and also provide enough heating at the same time). If you use rotating stands you can optimize it even more. I think much bigger problem will be controlling the humidity and preventing molds from attacking the plants.
- adrianN 8y agoIf energy costs were to rise, we could reduce the need for heating greenhouses by a lot if we built them a little smarter. For example you can build greenhouses in northern China, where it gets quite cold, that need almost no additional heating: https://solar.lowtechmagazine.com/2015/12/reinventing-the-greenhouse.html https://solar.lowtechmagazine.com/2015/12/reinventing-the-gr...