How much does it cost to run a whole-house humidifier?
A typical whole-house humidifier draws about 900 watts. Used 6 hours a day, that works out to roughly $0.92 per day, $13.77 per month, and $165.24 per year on an average electricity rate of 17¢ per kWh. Whole-house humidifiers run frequently during dry seasons to maintain optimal indoor humidity levels.
Whole-House Humidifier running cost calculator
- Per day
- $0.92
- Per month
- $13.77
- Per year
- $165.24
- CO₂ / year
- 388.8 kg
Based on 972 kWh per year. Adjust the price per kWh to match your latest electricity bill for an exact figure.
The number that matters most is your own electricity rate. Rates range from under 11¢ per kWh in some regions to over 30¢ in others, so the same whole-house humidifier can cost two or three times as much depending on where you live. Enter your exact rate in the calculator above to get a figure tailored to your bill.
Over a full year this whole-house humidifier uses about 972 kWh of electricity and is responsible for roughly 388.8 kg of CO₂ emissions on an average grid. Reducing run time, or switching to a more efficient model, lowers both the cost and the footprint.
If this whole-house humidifier is one you use daily, even small efficiency gains compound. Cutting its usage or wattage by 20% would save around $33.05 every year — money that an efficient replacement can recover over its lifetime.
Frequently asked questions
- How much does it cost to run a whole-house humidifier per hour?
- At 900 watts and a 17¢/kWh rate, a whole-house humidifier costs about $0.15 per hour to run.
- How much electricity does a whole-house humidifier use per month?
- Running 6 hours a day, a whole-house humidifier uses roughly 81.0 kWh per month, costing about $13.77.
- Is a whole-house humidifier expensive to run?
- Yes — at around $165.24 per year, a whole-house humidifier is one of the more costly appliances to run, so efficiency upgrades pay off quickly.
- How can I reduce my whole-house humidifier running costs?
- Use it during off-peak hours if your utility offers time-of-use pricing, reduce daily run time, and consider an ENERGY STAR rated whole-house humidifier, which uses less power for the same job.