Home Energy

Estimate electric heater cost from watts, hours, days used, $ per kWh, and thermostat on-time percent.

Estimate heat pump running cost from COP, HSPF2, SEER2, electric rate, backup heat, and current fuel comparison.

Estimate mini split cost per hour, month, and season from watts or BTU size plus SEER2, HSPF2, or COP.

Estimate portable AC cost per day, month, or season from watts, BTU and EER, run time, electricity price, and standby use.

Estimate window AC cost from watts or BTU and CEER, hours, days, electricity price, cycling time, fan power, and unit count.

Estimate AC running cost from BTU and efficiency or watts, with hours, days, electricity rate, cycling, and bill add-ons.