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Calculators
Duct Sealing Aerosol duct sealing calculator screening tool Estimates the cooling, heating, and combined annual dollar savings that can be achieved by sealing leaks in HVAC ductwork. Top of PageNatural Gas Chillers Gas cooling screening analysis tool Provides a rough estimate of the annual cost savings and payback period for a gas-fired chiller relative to a conventional electric compressor-based chiller, based on your cooling load and the electric and gas prices you enter. Top of PagePackaged Rooftop Air Conditioners Packaged RTU (roof-top unit) efficiency screening tool Estimates energy and peak demand savings as well as payback period for high-efficiency packaged roof-top air conditioning units. Top of PageIndirect Lighting Screening tool for indirect lighting Compares the total installed costs, annual operating and maintenance costs, and cooling costs of up to three direct and indirect lighting strategies. It also estimates a simple payback period for the indirect lighting alternatives. Top of PageHID Versus Fluorescent for High-Bay Lighting Fluorescent high-bay lighting savings calculator Estimates the annual energy savings and simple payback period achievable by replacing existing metal halide lamps with fluorescent lamps in high-bay applications. Top of PageMetal Halide Track Lights Metal Halide Track Lighting Savings Calculator Estimates the annual energy cost savings and payback periods for metal halide and other energy-efficient alternatives to halogen track lights. It also estimates total costs of ownership for each lighting technology over a 10-year period. Top of PagePersonal Dimming Controls Personal dimming cost-effectiveness calculator Estimates the bill savings and payback period for a lighting system that permits individuals to adjust fluorescent lighting to their personal preference in an office setting. Top of PageHarmonic Mitigating Transformers Harmonic mitigating transformer cost-effectiveness evaluation tool Estimates the annual energy savings and simple payback period for installing a harmonic mitigating transformer versus a conventional distribution transformer. Top of PageWalk-In Cooler Controllers Evaporator fan controller cost-effectiveness estimator Estimates the electricity and dollar savings potential and payback period for evaporator fan controllers on walk-in refrigerators and freezers, based on fan power, duty cycle, electric rate, and installed cost information that you provide. Top of PageGas-Fired Tank Water Heaters Gas-fired water heater screening tool Determines the energy consumption and payback periods for standard commercial and ultra-efficient commercial water heaters and compares them with consumption and payback for residential models. By necessity, this screening model makes simplifying assumptions, so use it for initial screening only. Top of Page
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