How much electricity do a washer and dryer use together. The average rating C-class may sound fine - but an A-rated dryer would cost you roughly half as much to run. Ariston Air Vented Tumble Dryer Freestanding 7kg Tvm 70c 6p Ex 60hz Our guide on buying tumble dryers explains more. Do tumble dryers use a lot of electricity . There are some T dryers that are heated by gas and they are cheaper to run. This is quite a bit of electricity compared to a dehumidifier that only uses about 300 watts in the same time frame. Condenser dryers are the most efficient but cost more too. A typical standard vented tumble dryer uses 250 kWh per cycle based on an average load capacity of 475 kg of dry laundry so the weight when you get it out of the dryer. You can get more from your tumble dryer by choosing the most efficient type on the market maintaining your appliance by cleaning the filter and the heat exchange on a regular basis and fastening zips poppers and buttons. All dryers use ele...