A heater assembly includes one or more first heating elements, the one or more first heating elements being characterized by a positive temperature coefficient; and one or more second heating elements, the one or more second heating elements comprising resistance wire elements. The one or more second heating elements are positioned in proximity to the one or more first heating elements such that at least one of the one or more second heating elements is configured to, upon being powered on, pre-heat at least one of the one or more first heating elements before the at least one first heating element is powered on.