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Accessory Sizing Chart

Recommended accessory sizes required for most applications. Heating equipment will maintain a greenhouse temperature 50 degrees warmer than outdoor temperature. If your greenhouse is located in colder climate you will need heaters with a higher capacity.

Greenhouse Approx Sq. Ft. Electric Heater Gas Heater Exhaust Fan Motorized Inlet Shutter Evaporative Cooling HAF Fan
108 HER50 HD30 SFV12c VRSG20A 1108 CFM 8"
162 HER75 HD30 SFV16c VRSG24A 1822 CFM 12"
144 HER75 HD30 SFV16c VRSG24A 1822 CFM 12"
216 HER100 HD30 (2) SFV20c (2) VRSG20A 2144 CFM 12"
288 Not Advised HD45 (2) SFV20c (2) VRSG24A 3000 CFM (2) 12"
324 Not Advised HD45 (2) SFV20c (2) VRSG24A 4000 CFM (2) 12"
432 Not Advised HD60 (2) SFV24c (2) VRSG30A 4500 CFM (2) 12"
540 Not Advised HD60 (2) SFV24c (2) VRSG30A 5500 CFM (2) 12"
648 Not Advised HD75 (2) SFV24c (2) VRSG30A 6500 CFM (2) 12"