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Heating and Cooling Loads - Polytunnel

Posted: Thu Apr 07, 2016 3:19 pm
by martinbell81
Has anyone got any experience of polytunnels?
Trying to size heating and cooling loads for a large polytunnel with a constant requirement for 25degC. Visqueen double skin Lumisol is the material but can't find any info on thermal or lighting properties. Any advice welcomed....