This is the kind of innovation I like to see. A greenhouse that is insulated by soap bubbles. This greenhouse is in the UK, but the original one is in Canada. Who said Canadians never invent anything? See more on the Canadian greenhouse here.
For small greenhouses, my favorite insulation on the south facing glazing is foil faced rigid insulation panels. You can design it so when they open up, they reflect more light into the greenhouse.
Related post: Solar Greenhouse Insulation
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Thank you for sharing this info. It is amazing.