Aquarium Heater Electricity Cost

Aquarium heaters run continuously but thermostats cycle them on and off — actual consumption is roughly 40–60% of rated wattage. A 100W heater costs about $4–7/month to maintain water temperature.

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Aquarium Heater Cost Calculator


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All appliance cost estimates — at your rate
Appliance Typical wattage Monthly cost Yearly cost kWh/month