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Glossary of Terms <br />HVAC Industry standard abbreviation for Heating, Ventilating and Air <br />Conditioning. <br />HtgDD/C1gDD HtgDD = Heating degree-days <br />ClgDD = Cooling degree-days <br />kW Kilowatt - a unit of electrical power, equal to 1000 watts. <br />kWh Kilowatt hours - a unit of electrical energy or work, equal to that <br />done by one kilowatt acting for one hour. <br />modification An allowance for changes in the facility which affect utility <br />usage that occur while tracking the performance of a meter. <br />Modifications correct both the actual and baseline usage and <br />cost for meters. <br />pre -installation Time period (start month and stop month, typically one year's <br />time) that is used as a benchmark for comparison which consists <br />of all energy bills applicable to the retrofit. <br />RZ A measure of how well the independent variable in a regression <br />can explain changes in the dependent variable. An R2 = " l .0,, <br />indicates a perfect correlation. <br />rate tariff Actual amount the utility company charges per unit of energy or <br />demand; used by MetrixTM to calculate utility costs for the <br />SimActual & Baseline scenarios, <br />reference year The actual usage for designated baseline period. <br />review period Time period for which savings are reported. <br />runtime adjustment Adjustment made for those hours equipment has run beyond the <br />operating hours specified in the contract. <br />simactual The total cost for the billing period as calculated by MetrixTM <br />weather adjustment Adjustment made by MetrixTM for weather variations using <br />degree days. <br />Year 3 Cost Avoidance Report, City of Cincinnati PH 5.10 <br />