Approximate Running Costs 2022


Based on 17.2p per unit. 1000w = 1kw

Cast Iron 300w

DegreesWattage per hourKw over 24 hoursLoad cost per 24hrs (Pence)
30 ̊C53w1.3£0.36
40 ̊C107w2.6£0.73
50 ̊C152w3.7£1.04
60 ̊C200w4.8£1.34
70 ̊C258w6.2£1.74

Cast Iron 600w

DegreesWattage per hourKw over 24 hoursLoad cost per 24hrs
30 ̊C132w3.1£0.87
40 ̊C255w6.1£1.71
50 ̊C409w9.8£2.74
60 ̊C554w13.3£3.72
70 ̊C625w15.0£4.20

Cast Iron 900w

DegreesWattage per hourKw over 24 hoursLoad cost per 24hrs
30 ̊C237w5.7£1.60
40 ̊C319w7.6£2.13
50 ̊C507w12.2£3.42
60 ̊C667w16.0£4.48
70 ̊C704w16.9£4.73