Case Study 1 - The Aspens

The following Case Study was conducted to validate the savings that we achieve on a typical installation. The case study involves monitoring and measuring the client’s boiler systems for period of time, thus establishing a “baseline”. Then we turn on our technology and measuring the operation for a like period of time. We calculate the differences and monetize the savings based on the cost of gas. This analysis is based on "run time" data recorded at the boilers gas valve. When the gas valve is open the # of seconds of boiler operation are recorded. This is considered the most accurate type of test because it isolates the actual gas being consumed by the boilers operation. Each of our installations can calculate savings based this methodology.   Gas Valve Runtime Analysis: Standard Operation Controlled Operation # of half hour data periods recorded 374 262 total hours for the test 187 131 total days for the test 7.79 5.46 total gas valve runtime (seconds) 92,456 49,478 total gas valve runtime (hours) 25.68 13.74 Boiler btu input rate 399,000 399,000 therms per hour (btu/100,000) 3.99 3.99 gas consumption for test 102.47 54.84 gas consumption therms per hour .55 .42 average cost of gas per therm $1.06 $1.06 average cost of gas consumed per hour $0.55 $0.44 average cost of gas consumed per day $13.94 $10.65 average cost of gas consumed per month $418.22 $319.48 average delivery temp 130.9 121.5 average return temp 123.9 116.3 average reheated return loop loss 7.1 5.1 therms saved per hour .13 savings % as per run time analysis 23.61% Summer Winter dollar savings per seasonal month $98.73 $118.48 total dwelling units on this system 32

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