List of Johnstone Supply Stores in Downingtown, PA Outlet Note Regular Brands Johnstone Supply Pennsylvania Downingtown Rating 5 based on 75 votes Products Tools Supplies HVAC Equipment HVACR Parts Motors Refrigerant NameAddressPhone Name/Address/Phone Johnstone Supply outlet - Downingtown 299 Boot Rd, #500 (610) 873-6100 People Also Viewed