Calculate how much heat your grow lights produce and what cooling capacity you need to maintain optimal grow room temperature. Accounts for all heat sources including ballasts, CO2 burners, and dehumidifiers.
Grow lights
Light type
Watts
Qty
+ Add light
Grow room
Warmest expected temp outside room
Other heat sources
Please add at least one light and enter room dimensions.
Total heat load
0
BTU/hr
0W
Heat in watts
0 tons
AC tonnage needed
+0F
Temp rise without AC
Heat sources breakdown
Total light wattage
Heat from lights
Total heat load
Room volume
Ambient temp delta
Min AC capacity needed
Recommended AC capacity (25% buffer)
Recommended cooling equipment
Heat management tips
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Exhaust fans first.
A properly sized exhaust fan pulling hot air from above the canopy can reduce AC load by 30-50% in cooler climates.
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LED runs cooler than HID.
A 600W LED produces roughly 40% less heat than a 600W HPS, significantly reducing your cooling load.
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Run lights at night.
In hot climates, running lights during overnight hours reduces the ambient temperature delta and cuts cooling costs.
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External drivers/ballasts.
Moving ballasts and drivers outside the grow room removes 10-15% of their heat from the space entirely.
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