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    42 x 630cmh lights, how much cooling needed

    I did that last week, they had the number under 100,000 btu as well. Looks like its much closer to 10t than 20t
  2. T

    42 x 630cmh lights, how much cooling needed

    Thanks for all the advice apart from the one idiot. Every village has one.
  3. T

    42 x 630cmh lights, how much cooling needed

    Hi All I'm currently building a commercial grow in colorado. I had the facility designed by a specialist design company. I was a bit dubious becuase they kept trying to sell me their own products. Anyway, long story short, they say I need 20 ton HVAC for each grow room that has 42 x 277v 630w...
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