More than one million commercial establishments, such as hotels, restaurants and laundromats, use propane in the same way a homeowner does: for heating and cooling air, heating water, cooking, refrigeration, drying clothes, barbecuing and lighting. More than 350,000 industrial sites rely on it for space heating, brazing, soldering, cutting, heat-treating, annealing, vulcanizing and many other uses. Petrochemical industries use propane in the manufacture of plastics.