High Efficiency Fan Savings vs. High Efficiency Motor Savings

Plant Engineers should consider buying 30% more efficient fans rather than just 3% more efficient motors. You will come out thousands of dollars ahead both in first cost and lifetime cost.

A straight radial paddle fan selected for a rating of 40,000 CFM @ 15" SP will use 155 BHP.

If you drive this fan with an energy efficient motor (96%) for 6,000 hr./yr. at $0.06/kw-Hr your electric bill will be $43,361 annually. If you use a standard efficiency (93%) motor, your cost would be $1,399 more or $44,760. A standard efficiency TEFC 150 HP motor costs $4,268 and the high efficiency motor costs $5,732. It would be a reasonable decision to spend $1,464 more for a motor that would save you $1,399 annually to use it.

On the other hand, if you bought a high efficiency New York Blower Acoustafoil® fan instead of the paddle fan for the same performance rating it would use only 114 BHP instead of 155 BHP. Both fan types are essentially the same first cost unlike the higher cost for the high efficiency motor. The more efficient fan saves you 41 BHP, $11,470 annually, or 8 times as much as the more efficient motor.

	Baxter Air Engineering has been successful replacing low efficiency fans to reduce plant operating expense. Many times your local electric utility is more than willing to financially assist you replacing your old fans.

Energy Savings Go Right to the Bottom Line!

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