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AC Cooling Cost Calculator
Summer cooling cost from SEER, hours, and rate.
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Efficiency cost calculators
Focused screening tools for efficiency cost.
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COP EER SEER Converter
Convert between COP, EER, and estimated SEER.
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Dual-Fuel Switchover Calculator
Heat pump vs gas cost per delivered MMBtu.
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Electric Furnace Cost Calculator
Resistance heat: the baseline everything beats.
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Furnace Fuel Cost Calculator
Yearly heating bill: natural gas vs heating oil.
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Heat Pump Balance Point Calculator
Balance point from load line and capacity lines.
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Heat Pump HSPF Savings Calculator
Seasonal savings from a higher HSPF rating.
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Heating Cost Comparison
Annual heating cost: heat pump vs gas furnace head to head.
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Oil to Gas Conversion Calculator
Conversion savings and payback year count.
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Propane Heating Cost Calculator
Annual propane cost from load, price, and AFUE.
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SEER Savings Calculator
Yearly dollar savings from upgrading to a higher SEER rating.
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Space Heater Cost Calculator
Monthly cost of running an electric space heater.
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