How to build a very cheap Danish Heat storage (and my experiment)

	How to build a very cheap Danish Heat storage (and my experiment) Basic Data Category: Heat storage URL (first publication): https://www.youtube.com/watch?v=sBIXRLVXuG0 no no no Other Design files are in original format: No Free redistribution is allowed licence: No

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Construction costs of these heat storages = 5-50 USD per qu. m of water, their lifespan = 20-30 years References: - (in English) ...