Ventilation |
Ventilation
Proper Ventilation is a Key Ingredient for Healthy Plants
Your plants will love the protection and light they receive froma greenhouse, but they will miss on thing: fresh air! That's why it is so important to include good ventilation in a greenhouse.
Plants need a fresh supply of carbon dioxide so they can properly photosynthesize and make food. Good ventilation also reduces woverheating in the greenhouse and will help deter pests.
For best results, air should circulate thoughout the entire greenhouse. In smaller greenhouse the cross ventilation is easily achieved by positioning base bents low on one side and a large vent or exhaust fan placed high on the wall of the opposite side. This will help bring in fresh air and pull stale air out of the greenhouse. Circulation fans placed inside the greenhouse help increase cross-ventilation as well as encourage pollination with in the greenhouse.
Find the right sized exhaust fan for your greenhouse.
To determine the proper size of exhaust fan you may need you must calculate the volume of your greenhouse. Fans are rated by CFM, which is the amount of air they can move in a period of time, hense, CFM or Cubic Feet per Minute. For a simple estimation multiply the length x the with x the height of the greenhouse. This will slightly over-estimate you volume because of roof pitch.
For Example: The 8' x 12' x 8' Garden Oasis would need 768 CFM (8' x 12' x 8' = 760 CFM). The 12" standard exhaust fan would be sufficient at 760 CFM.
Model # |
Description |
Retail |
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HV-10 | Solar Powered Vent Opener | $59.95
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HV-20 | Closeable Base Vents -ABS polymer vents allow fresh air to continually flow through your greenhouse. Mount near base in corners of the greenhouse for natural 'ground up' cross ventilation. Close during cold weather to save heat. Vent measures 4" x 9". | $12.95 |
| See picture below | HV-30 | Easy-Flow Louver | $99.95 |
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HV-31 | Easy-Flow Solar Opener | $79.95 |
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VT8VK | 8" Circulation Fan w/cord | $129.95 |
| VT12PA | 12" Circulation Fan | $169.50 |
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| VT20PA | 20" Circulation Fan | $219.50 |
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The shutter style exhaust fan is installed with the wire cage and fan motor on the inside with the shutter vents to the outside. | ||
| SFT-1200 | 12" Exhaust Fan - Shutter Style - Vari-speed (760 CFM) | $179.00 |
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| SFT-1600 | 16" Exhaust Fan - Shutter Style - Vari-speed (1250 CFM) | $225.00 |
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| SFT-2000 | 20" Exhaust Fan - Shutter Style - Vari-speed (3122 CFM) | $275.00 |
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The flush mount exhaust fan installs to the inside of the framing and protrudes to the outside. The shutters are then flush with the interior and the fan and motor are in the protruding housing. | ||
| PFM-1200-1 | 12" Exhaust Fan - Flush Mount - Vari-speed (1604 CFM) | ||
| PFM-1600-1 | 16" Exhaust Fan - Flush Mount - Vari-speed (3085 CFM) | ||
| PFM-2000-1 | 20" Exhaust Fan - Flush Mount - Vari-speed (3533 CFM) | ||
| PFM-2400-1A | 24" Exhaust Fan - Flush Mount - Vari-speed (7200 CFM) | $675.00 |
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| H-115 | Manual Fan Speed Control - 115V | $79.00 |
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| T-115 | Thermostat - one speed | $72.50 |
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Motorized Air Intake vents are used in conjunction with exhaust fans for ideal ventilation. This motorized intake creates an effective seal against outside air when closed, then opens as the fan turns on to ventilate your greenhouse. | ||
| MIT-1200 | 12" Motorized Intake Air Vent | $191.50 |
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| MIT-1600 | 16" Motorized Intake Air Vent | $199.50 |
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| MIT-2000 | 20" Motorized Intake Air Vent | $209.50 |
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| HV-70 | Stanley Blower Fan - pivoting 3-speed utility fan | $87.50 |
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| HV-80 | Lasco Clip Fan - air circulation for a small growing space | $16.95 |
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