bathroom fan - trickle mode

want2bmortgage3

i bought a decent fan for the bathroom, a vent-axia solo plus HT. so far i've been running it on a permanent trickle, with a boost mode when the light switch comes on or it gets humid.

just wondering if this is costing me much in electricity.. i've looked up the spec and all i can find is on trickle mode its 20.3 watts. i know my cost per kWH but how does the watts relate to this?

i'd like to leave tricke on in some ways to help with ventilation in the whole flat but it all depends on the cost... appreciate any replies

want2bmortgage3

i just found this site after googling : http://www.cryer.co.uk/brian/misc/how_much_electricity.htm

it tells me how many KWH a device uses based on its watts

so i've worked out leaving it on trickle 24/7 would cost about £26 a year. based on 15p per kwh at 20.3 watts! worth using this site to work out other appliances usage!