A shrink wrap machine has a shrink wrap tunnel with an entrance and an exit. The first circuit includes a first input coupled to a voltage source and a first output that provides a first output current having a substantially non-zero temperature coefficient. A device for forming mortise sockets and tenons on log members in a reproducible manner includes a pair of work holders which define a longitudinal axis of the log member. The controller is configured to change the power consuming functions by adjusting one or more of an operation schedule, an operation delay, an operation adjustment, and a selective deactivation of at least one of the one or more power consuming functions to reduce power consumption of the clothes washer in the energy savings mode.