Dehumidifiers could be costing some UK households around £31.61-a-year from the start of next month, our calculations suggest. From April 1, people in England, Wales, and Scotland on a standard variable tariff, and who pay for their electricity by Direct Debit, will pay 24.67p per kilowatt hour (kWh) on average.

It marks a 7% reduction on the current price cap of 27.69p per kWh, with Ofgem saying the main cause of the drop is Government budget interventions. That means your electricity bills will soon be cheaper, but you could still be racking up sizeable sums if you use certain appliances a lot. Dehumidifiers have grown in popularity in Britain in the past few years, helping rooms feel warmer by soaking up moisture and exhausting warm, dry air. They’re also effective at tackling buildups of moisture and mould.

A study by Uswitch published in January, looking at appliance usage and costs, estimated that dehumidifiers see 295.8 minutes of use per week on average.

Smart Money Tools’ Electricity Cost Calculator allows you to work out how much electricity certain devices use, and their costs under whatever the price cap is at the time.

Its default power consumption for dehumidifiers is 500W (0.5 kW), which falls within the range you can expect from your device.

Taking 295 minutes a week as a rough average and spreading it over seven days to fulfil its hour per use field, that level of usage works out to £35.48 over the course of 12 months. That’s the equivalent of £0.02 per 10 mins, £0.10 per day, and £2.96 per month.

Under the April 1 cut it would drop to £31.61 over the course of a year. That’s made up of:

• £0.02 per 10 mins
• £0.09 per day
• £2.63 per month

However, it’s worth noting that power consumption will vary between models, as will household usage.

Additionally, the cap on both estimates is reviewed by the regulator every three months and doesn’t remain in place for a full year.

Meanwhile, the standing charge will rise slightly from its current 54.75p level to 57.21p per day. The April 1 price cap will apply until June 30, with the next cap level announced on May 27.