We have George B. Simpson, inventor of the 1859 "electro-heater" surface, to thank for the convenience we enjoy with today's kitchen ranges. Simpson's original battery-powered model was used to warm room as well as to boil water and cook food according to his patent. No doubt, he would be pleased to see how far ranges have come since then. One common range brand is Estate, a budget-friendly line associated with Whirlpool. If your Estate range needs a tune-up, we have the quality replacement part -- from knobs to igniter kits and surface elements -- for your model. We'll help you to quickly and easily get your Estate range back to its dependable self again.