Oliver Heating, Cooling, Plumbing, & Electrical is Chester County's most trusted HVAC sales and repair company. Oliver furnishes, installs, and services most types of heating, ventilation, and cooling equipment. We also offer services in plumbing, water heaters, electrical, geothermal, solar, and air duct cleaning for residential, commercial, and industrial markets. When it comes to our HVAC services, our friendly and trained professionals are prepared to help you 24 hours a day, 7 days a week.