Energy-Efficient Greenhouse Fans
Although fans in themselves are not major power consumers, given the large number of fans in a greenhouse, it may still pay to look into this. With a simple calculation, we provide insight into the current power consumption and what a modern alternative can provide. In the example, the number of ventilators in the greenhouse is determined based on a circulation rate of 3. This circulation rate may vary per situation or crop, but this example gives a realistic indication for one specific situation.
Current Situation
We assume a greenhouse of 160,000 m3. If multiplied by a circulation rate of 3, the circulation fans must move 480,000 m3 of air per hour.
Current Fan
The commonly chosen fan in the past was the 1~ 230v fan that moved 5,350 m3/h with a current draw of 240w. In the old situation, 90 fans were needed to move 480,000 m3/h of air, collectively consuming 21,600 watts per hour.
New Fan Option 1
This example uses a horticultural fan from the new energy-efficient 5,000 m3 line. Each fan moves 4,850 m3/h at 119w. To move 480,000 m3/h of air, 99 fans are required, consuming 11,781 watts per hour. This represents a 45.5% energy saving, making them cost-effective.
New Fan Option 2
Using a more powerful 7,000 m3 fan line, each unit moves 6,450 m3/h at 190w. Only 74 fans are needed to move 480,000 m3/h, consuming 14,060 watts per hour. This achieves a 35% saving while requiring fewer fans.
Benefits
Beyond energy savings, factors like purchase price, installation, transportation costs, and local energy prices influence the investment and payback period. Contact your dealer or installer for the most economical solution or consult one of our specialists.