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Old May 30, 2016   #56
Join Date: Apr 2016
Location: California
Posts: 126

Ron, You said
its only a "grow room" situated in my living room
How warm is your living room? 68F? 72F? Unless you are letting your living room get very cold, most of the heating will be done by your furnace. You just need a little extra heat to push the temp up to 75F and compensate for any evaporative cooling from the water in the soil. Your growing lights alone could push the temperature up more than 3 degrees and soon you will need to worry about cooling the air as well as heating the soil.
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