Hello...from what i can find a 1000 watt hps can throw off b/n 3000 to 5000 btu per hour....too big a range for the HVAC guy to accurately size a 20x20' x9' flower room with 36 lights.....any comments?
Also i know the ballast throws off 3.4 btu/h per watt or in this case 3400 btu....is this...