Rossi Mechanical Services specializes in the sales, service, and installation of heat pumps, gas hot air, electric air-conditioning including humidity control, and electronic devices. We sell, service, and install brands such as G.E., Weil McClain, Trane/American Standard, Bryant, Rheem, Ruud and Aprilaire. Our services also include water heater repairs and installation?A.O. Smith, Rheem, and State. Our expertise ranges from the oldest homes in Philadelphia, most notably Elfreth's Alley, to modern homes and townhouses. Call us for water heating installations and preventative maintenance. We look forward to doing business with you. Free Estimates on Installations.