CostCandid

Running an air purifier 24 hours a day may sound expensive, but electricity is only part of the cost. The real long-term cost depends on four things: power consumption, electricity rates, replacement-filter prices, and how often you replace the filter. A relatively efficient air purifier may cost only a few dollars per month in electricity, while replacement filters can add $50, $100, or considerably more to the annual operating cost. That means the cheapest air purifier to buy is not necessarily the cheapest one to own. This guide shows you how to calculate the electricity cost, filter cost, and total operating cost of an air purifier using your own numbers. Quick Answer: How Much Does an Air Purifier Cost to Run 24/7? As a simple example, consider a 40-watt air purifier running 24 hours per day. Using an electricity rate of 18.44 cents per kWh : 40 watts ÷ 1,000 = 0.04 kW 0.04 × 24 hours = 0.96 kWh per day 0.96 × 365 = 350.4 kWh per year 350.4 ...