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ENERGY, WASTE MANAGEMENT ASSESSMENT 4. Patert~iai S~~rir~gs E?iscussian afi Benchmarks RETAP Benchmark information can provide guidelines and establish goals to strive for in attempts to reduce energy use in your building. For example, if the benchmark number for electrical usage of 11.6 KwH/sq.ft were achieved, the savings in electrical energy would be 0.6 KwH/sq.ft. X 10,600 sq.ft. _ 6,360 KwH per year and $642 per year. If the benchmark number for fuel were achieved, the fuel savings would be 14 Kbtu per sq.ft., or 14 X 10,600 = 148,400 Kbtu per year or 1,484 therms and $1,178 per year. The TOTAL savings would be $1,820-per year. If the facility were to achieve Energy Star benchmarks(25 percent below DOE IA benchmarks), the potential savings would be 36,040 KwH and 2,544 therms per year, or $3,640 + $2,019 for a total of $5,659 per year. Some potential savings recommendatios are listed below, which would bring this facility closer to the benchmark energy usage numbers. ; Electric Bills A review of the electric bills for 2010; 1. The overall unit cost for electricity was $0.101, including fees, taxes, etc., a relatively high unit cost. 2. The total cost for electricity was $1.23 per square foot of space. Fuel Bills A review of the fuel bills for 2010; 1. The overall unit cost of fuel was $0.794 per therm. 2. Water heating used about 140 therms, out of a total of 5,921 therms, about 2.4 percent of the total: Building Envelope Consider adding insulation to the roof/ceiling to increase the "Rfl value from the estimated 16 to a recommendaed 38. This would reduce the fuel used for heating and the electrical energy used for cooling and to run the HVAC system: Potential=fuel saved would be about-1;000 therms and $794 per year, based on 7,967 degree days and 90 degree design heating emperature difference and 20 degree design cooling temperature difference and a 75 percent efficient system. The electrical energy saved would be: about 1,720 KwH and $174 per year, for a total of $968. . HVAC Consider a complete. evaluation of the HVAC system, including a possible recommissioning to .improve the overall efficiency of the heating system from an estimated $0 percent to 90 percent.. This. may .include replacing old equipment with new, high efficiency equipment, adding VFDs, modifying the control systems, etc. Water heating uses about 140 therms of fuel per year, leaving 5,781 therms for building heating and about 20 percent of the electrical energy used was for the HVAC system. Improving the overall HVAC efficiency by 10 percent would reduce the fuel used by 578 therms per year and the electric use for the system by 3,000 KwH, or $460 and $326 for a total savings of $786 per year. Rages of 9