A Direct Debit is simply an instruction from you to your bank or building society that authorises Calor to collect varying amounts from your account – but only if you've been given advance notice of the amounts and dates of collection. Once you have agreed those, the money is deducted automatically. In a nutshell, Direct Debit is the simplest and most convenient way for you to pay your Calor bills. For ROI Customers, we can set up your Direct Debit, over the phone, online or submit a paper form. Please call us on 01 450 5000 to arrange. For our NI Customers, we have to post you a form to complete. Please call us on 028 9045 5588 or email us at CreditControlTeamNI@calorgas.ie to arrange.