BENTON HARBOR (WKZO) -- Benton Harbor-based Whirlpool is celebrating earning the Good Housekeeping Seal for its new Whirlpool Gold Gas and Electric Ranges.  The world's largest appliance maker says the ranges use what it calls its TimeSavor Plus True Convection cooking system to circulate hot air over, under and around food.  They carry a suggested retail price starting just under 11,000-dollars.