W.L. Zimmerman & Sons provides dependable delivery of Propane, Heating Oil, Kerosene and Diesel Fuel to areas within Lancaster and Chester Counties. Providing superior service of heating and cooling equipment, satisfying our customers is our #1 goal. Our trained professional drivers and service technicians supply outstanding service to your home, farm or business. No matter what your heating or cooling needs are, W.L. Zimmerman & Sons delivers excellent quality and service.. * Automatic Delivery* Diesel Fuel* Heating Oil* Kerosene* LP Gas