alexalbinos
Member
Hi I'm looking into using a GrowLab GL145 (4'9" x 4'9" x 6'7") and someone suggested me to use it with with three 600w MH lights for veg and two 600w HPS for flowering, but I am unsure what kind of ventilation I should have. Someone gave me this formula to find the CFMs I would need : (3.2 x wattage) ÷ (temp differential) = CFM air movement. What temp differential should I have? He also gave me this
Q = V x P x C x dT
Q = Amount of lighting (kW)
V = Volume of air being ventilated (m3/s)
P = Density of air (assume 1.2 kg/m3)
C = Specific heat capacity of air (assume 1.02 kJ/kgK)
dT = Temperature difference between ambient and growspace air in degC
But I can't figure out what dT should be so then I can't find out what V is. Any help is appreciated.
Q = V x P x C x dT
Q = Amount of lighting (kW)
V = Volume of air being ventilated (m3/s)
P = Density of air (assume 1.2 kg/m3)
C = Specific heat capacity of air (assume 1.02 kJ/kgK)
dT = Temperature difference between ambient and growspace air in degC
But I can't figure out what dT should be so then I can't find out what V is. Any help is appreciated.
