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Calculator: how much more a dirty unit uses

Estimate based on DOE data (dirty filters +5–15%) and LBNL (loaded coil, +5–10% fan energy). Not a bill, an order of magnitude.

Explanatory diagramEstimated energy: power × time
Estimated energy: power × time
  1. Average electrical input, in kW.
  2. Operating time, in hours.
  3. Estimated energy, in kWh; actual use varies.

BTU describes thermal capacity, not electrical consumption directly.

This is a scenario, not a measurement of savings. BTU is cooling capacity, not electrical consumption. Use measured average input where possible. The chosen percentage is an assumption and cannot be inferred from dirt alone.

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The information on this page is educational and based on cited sources; it does not replace medical advice. We do not do repairs, installation or refrigerant circuit work.