Office Plants Maintain Perfect Humidity Levels

Dr. Virginia Lohr (Washington State University, Pullman, Wash.) demonstrated that plant transpiration in an office environment creates a humidity level exactly matching the recommended human comfort range of 30% to 60%.

When the air is too dry, people are vulnerable to colds and flu. When the humidity is too high, people can develop other complaints. Through their natural processes of transpiration and evaporation, office plants add moisture to the dry overheated air often found in sealed office environments. At the same time, studies show that plants do not add moisture in significant amounts when the air is already moist. A study conducted at Washington State University, suggests that plants help regulate humidity. When office plants were added to the environment, the relative humidity stabilized within the recommended "healthy" range of 30 to 60%.

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