A storage drum heater has an elongated housing and is typically used in a vertical orientation between storage drums arranged on a pallet. The method includes receiving as input one or more specifications, where each specification includes a hierarchy of queries. The controlled protocol timer can provide for incremental exposure increases; monitors patient compliance with a treatment regimen; and reminds the patient when a treatment will soon be overdue. A related dishwasher appliance is also provided. wherein R1 through R8 and n are as defined in this disclosure. Another embodiment provides a gate electrode structure with thin inner spacers and partially recessed outer spacers.