As spring turns to summer, greenhouse growers face the annual challenge of maintaining optimal temperatures for high-quality, marketable floriculture crops. The relationship between temperature and plant health is profound: temperature not only drives the rate of plant growth and development, but also influences the overall quality, compactness, and flowering of your crops. When air temperatures are too high, plants may exhibit heat stress symptoms such as stem elongation, flower delay or abortion, pale flower color, and/or chlorotic (yellowing) or bleached (whitening) leaves. These symptoms can diminish plant marketability and ultimately affect your bottom line.
Fan-and-pad cooling systems are essential for managing greenhouse climates, especially during hot periods. These systems use evaporative cooling to reduce air temperatures, creating a better environment for crops. The process works by drawing hot, dry air through a water-saturated pad using exhaust fans located on the opposite end of the greenhouse. As the hot air contacts the wet pad, water evaporates, cooling the air. This cooled air is then pulled across the greenhouse by the exhaust fan. This method not only helps maintain target temperatures but also supports consistent plant quality and productivity during the warmest months.
However, the effectiveness of a fan-and-pad system relies on regular inspection and maintenance. Even minor issues, such as a partially dry pad, a slipping fan belt, or a clogged intake screen, can significantly reduce cooling capacity and increase energy costs. By proactively maintaining your system, you can avoid these problems, maximize cooling efficiency, and ensure you maintain an optimal greenhouse environment throughout the season.
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