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For the past several years, Ray Avedon has been developing the Airius Thermal Equalizer product line to reduce the effects of heat rising to the ceiling, thus reduce the related excess energy consumption while improving the air environment in a facility. This document summarizes a case study of the impact of installing Airius Thermal Equalizers in two facilities of the parent company, Avedon Engineering, Inc., both located in Longmont, CO. The two facilities are (1) 711 S. Lincoln Street, a manufacturing facility and (2) 811 S. Sherman Street, a tool room and the corporate office.
The Lincoln facility is approximately 55,000 sq. ft. with a maximum ceiling height of approximately 35 feet. Over 70 percent of this facility is a production area with high ceilings. Since May 2004, twenty two (22) Airius Thermal Equalizer units have been installed and are operating in the production area. These units run 24 – 7 – 365 days a year.
The Sherman facility is a combination of a large tool room, approximately 16,000 sq. ft. with a maximum ceiling height of 31 feet and several overhead cranes. The remaining 29,000 sq. ft. is a combination of corporate offices with maximum ceiling height of 10 feet and locker rooms, workshops and laboratories with ceiling heights of a maximum of approximately 15 feet. Fourteen Airius Thermal Equalizer units have been installed in the tool room. Additional Airius Thermal Equalizer units, approximately 10, have been ins talled in suspended ceilings in offices and free-hanging units in workshops and laboratories representing approximately 10,000 sq. ft.
These units run 24 – 7 – 365 days a year.
Following is a summary of the energy reduction realized from May 2004 though April 2005 compared with the average annual energy usage in these two facilities for the prior five years. The information includes historical energy usage and average temperature provided by Xcel
Energy.The total temperature degree days in Longmont, CO from May 2004 to April 2005 is exactly the same as the total average annual degree days for the prior 5 years.
The energy reduction in therm usage from May 2004 to April 2005 compared to the average annual therm usage in the prior five years in both the 711 South Lincoln facility and the 811 South Sherman facility are both in excess of 60 percent.
711 S. Lincoln St. 68.8 percent reduction in therm usage
811 S. Sherman St. 62.4 percent reduction in therm usage
The energy reduction in therm usage in the two facilities results in an estimated energy cost savings of almost $30,000 for the May 2004 to April 2005 time period. This assumes an average cost of $.60 per therm.
711 S. Lincoln St. $21,806
811 S. Sherman St. $8,124
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Total $29,930
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The life cycle payback for the product cost and the cost of installation for both buildings is approximately one year.
711 S. Lincoln St. 0.70 years
811 S. Sherman St. 2.07 years
Both Facilities Combined 1.07 years
The addition of the Airius Thermal Equalizers is the only energy reduction capital equipment improvement made to these two facilities since April 2004.
Click Here for the 711 S. Lincoln Gas Savings table
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Product Cost
Estimated Installation Cost
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$ 8,690
$ 6,600 |
Estimated Annual Savings |
$21,806 |
| Total Cost |
$15,290 |
Estimated Simple Payback |
.70 years |
Note: The rapid simple payback of the Lincoln facility is augmented by the harvesting of the heated air rising to the ceiling from the manufacturing process and returned to the floor by the Airius Thermal Equalizers, thus balancing the ceiling and floor temperatures.
Click Here for the 811 S. Sherman Street Gas Savings
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Product Cost
Estimated Installation Cost
Total Cost
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$ 9,640
$ 7,200
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$16,840
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Estimated Annual Savings
Estimated Simple Payback |
$8,124
2.07 years |
711 S. Lincoln Street Total Cost
811 S. Sherman Street Total Cost
Total Estimated Energy Cost Savings
Estimated Combined Simple Payback |
$15,290
$16,840
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Total $32,130
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$29,930
1.07 years |
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