Leffler Energy is the local heating, cooling and energy savings partner that keeps customers in central and eastern PA comfor ... table all year round. We also take care of many more of your home, agricultural and industrial needs with services that are all designed with you as the #1 priority Located in Lancaster, PA Leffler Energy provides services in communities throughout central and eastern Pennsylvania. Company Specialties: Full-service heating oil, propane and air conditioning provider, heating and air conditioning equipment, SmartPay budget plan, 24/7 local customer service and support, heating oil pricing plans, energy-efficient equipment installation and repair, backup generator services, indoor air quality solutions, duct cleaning and maintenance, chimney services and repairs, agricultural and commercial services. read more