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The Science | Energy Efficiency | Energy Savings | Application of Physics
It is common knowledge in fan design that the power required to drive a fan varies approximately with the cube of the average air speed through the fan - i.e. doubling the air speed requires eight times the power. Accordingly, a fan blowing air at 20 mph requires 64 times as much power as one blowing air at 5 mph.
With their larger diameters AirMotion Big Smart Fans (the Next Generation of High Volume Low Speed fans) create larger flows of air that have proportionally less surface area and therefore encounter less friction and related drag. This allows the air to move further using less energy and effort than the high-speed fans. Combine this with our VPT™ (Variable Pitch Technology) and you get what we call Complete Facility Movement of air.
This energy efficiency equates to energy savings where one AirMotion big fan does the work of, and replaces, many standard high-speed industrial fans and other HVAC solutions; for example -
EFFICIENCY = SAVINGS VERSUS USING STANDARD HIGH-SPEED INDUSTRIAL FANS
It is estimated that it would take at least 15 high-speed 0.5 hp 36" fans (or twelve 48" fans) to provide the same cooling effect of one 15 ft 1.5 hp AirMotion Big Smart Fan per 10,000 square feet of a typical 100,000 sq ft distribution center in Oklahoma City. The annual electrical operating costs over six months of those 15 high-speed fans would be approximately $2,376, versus $302 for the one AirMotion big fan. The difference in installed cost of the 15 high-speed fans is estimated to be $1000 less than the installed cost of one AirMotion big fan.
Accordingly, payback of the cost difference is less than a year ($2,074 annual savings versus incremental installation cost of $1000). Full payback on the installed cost of one AirMotion Big Smart Fan as a cooling alternative is less than 3 years. The NPV (Net Present Value) over 10 years would be about $15,000 per AirMotion big fan (not to mention that high-speed fans will most likely require frequent maintenance and replacement). Cooling 100,000 square feet of distribution facility means big savings with the big fans; and not to forget, AirMotion Big Smart Fans provide more effective cooling than the high-speed fans.
EFFICIENCY = SAVINGS VERSUS OTHER HVAC EQUIPMENT
As above, significant financial benefits can be achieved by using AirMotion Big Smart Fans in lieu of, or as a supplement to, installing and operating typical heating, ventilating, cooling, and other air movement equipment. For example, AirMotion Big Smart Fans are more effective in performance and cost than multiple wall and roof mounted ventilation fans that typically have eight to twenty-five horsepower motors. Payback comes quickly from the operating and energy cost savings while providing greater air movement.
"A 30,000 sq ft county maintenance facility in upstate Michigan has been using two AirMotion Big Smart Fans. They claim to have reduced their heating fuel usage by 75%, and when they park their plow trucks at night with a foot of ice on them, the next morning all the ice is gone with no trace of moisture anywhere. In the summer, their guys used to eat their lunch outside under a shade tree, now they eat in the shop under the fans."
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AirMotion Big Smart Fans provide quick payback and high return on investment (compared to the high-speed air movement systems) as low speed air motion requires less energy. It's a smart investment with significant future benefits.
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AirMotion Sciences, Inc. ▪ 9 Green Street, Holliston, MA 01746, USA ▪ T 508.429.4411 F 508.429.4401
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