Greenhouse Circulation Fan vs. Exhaust Fan: Which Job Is Missing?
Exhaust fans exchange air with outdoors; circulation fans mix air inside. Use a symptom-based matrix to find which job or system check is missing.
Ventilation
Passive Greenhouse Ventilation: When Natural Airflow Is Enough
Use a practical decision matrix to judge passive greenhouse ventilation, opening layout, weather dependence, restrictions, and when powered backup is needed.
How to Size Greenhouse Intake Vents
Size greenhouse intake openings from stated fan geometry, then check free area, pressure drop, screens, shutters, and staged operation before installation.
Where to Place a Greenhouse Exhaust Fan
Place the exhaust fan and intake as one airflow system. Use this planning guide to avoid shortcut paths, restrictions, and common layout mistakes.
Greenhouse Ventilation Calculator
Calculate greenhouse floor area, approximate volume, a source-specific summer exhaust reference, equivalent ACH, and an optional nominal intake-area check.
How to Size a Greenhouse Exhaust Fan
Calculate a source-specific summer exhaust-airflow estimate, convert it to equivalent ACH, check intake area, and compare fan data at static pressure.
Greenhouse Ventilation: How to Control Heat, Humidity, and Airflow
Learn how passive vents, exhaust fans, intake openings, circulation fans, and controls work together—and how to find the weak link in a hot, humid, or stagnant greenhouse.