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I like your plans Heisengrow! Sounds like a perfect setup, I originally built my current rooms for building RC airplanes when my boys were young, plenty of power outlets, high ceilings but no floor insulation, plus I get air leaks from my wall outlets when the exhaust fans are running high, for the life of me I cannot figure out how cold air is even getting into the wall..... I have been thinking of a purpose built like you are building it would save me $$ in AC & heat no doubt about it, I run DE HPS lights in the winter for "heat" vs a resistance heater..... Keep me posted on your project please....