I was just wondering how much the blowers on the PB-105 add to the avarage New Enland electric bill. Mine have no shut off after the call is done. I understand that Harman did this, this way, on purpose to create a constant draft, but are they getting a kick back from the local utilities (LOL). Seriously has anyone noticed a jump in their utility bill from this attempt to get off oil. Thanks Bob Ps. if anyone has found a safe "approved" method of starting/stopping these when there is a call/no call please post your solution.