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Case Study Text:

In the summer of 2010, executives at Enovative Kontrol Systems met with their counterparts from the Sustainability Division of Equity Residential, one of the largest, most prestigious multi-family property owners in North America. The issue under discussion was how to make Equity’s 100,000 + units portfolio more energy efficient, while continuing to deliver the highest quality amenities and services to their tenants.

With guidance from members of Equity’s Sustainability Division, Enovative set out to monitor gas and electricity usage at two specific buildings over a two month period. Data loggers were placed on gas lines in the boiler and one to measure the electricity used to run the pump, between alternating weeks of continuous and demand controlled circulation. The meeting concluded with a decision to conduct parallel case studies, using Enovative’s demand controller pump at a pair of Equity’s signature properties, the Toscana Apartments and Kelvin Court Apartments located in Irvine, California.

With guidance from members of Equity’s Sustainability Division, Enovative set out to monitor gas and electricity usage at two specific buildings over a two month period. Data loggers were placed on gas lines in the boiler and one to measure the electricity used to run the pump, between alternating weeks of continuous and demand controlled circulation. The meeting concluded with a decision to conduct parallel case studies, using Enovative’s demand controller pump at a pair of Equity’s signature properties, the Toscana Apartments and Kelvin Court Apartments located in Irvine, California.

The data showed an average annual gas savings to be 16% or 745 therms and an average electricity savings to be as high as 98% or 1002 kWh per year. Translated into dollars, the combined annual savings between the buildings would be $1900. Over the expected life of a single demand controller pump, each Equity property, on average, could save $14,250 in utility costs.

By using demand controller to reduce the amount of energy consumed for hot water, not only will Equity receive the immediate advantages of lower utility bills, but it will be preventing unnecessary wear and tear on the piping system and storage tanks. When demand controller shuts off and run time is shortened by as much as 23 hours per day, it decreases the negative effects re-circulating hot water has on pipes, in addition to extending the life of the pump and heater/boiler.

The demand controller is easily installed in under an hour and requires no follow up maintenance. Given the total savings in utilities and the reduction in maintenance and repair costs as a result of using demand controller, the Net Operating Income ( NOI) increases dramatically. Based on a 5% market cap rate, the individual property value will have risen $639. Taken as an average for the entire Equity Residential portfolio, the overall increase in assets would reach as high as $87,680,000.

 



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