Air Conditioning Contractors & Systems Near Me in Johnstown, Ontario Air Conditioning Contractors & Systems Near Me in Johnstown, Ontario Home / Ontario / Johnstown / Air Conditioning Contractors & Systems Air Conditioning Contractors & Systems Millar Mechanical 33 Elizabeth St RR 3, Johnstown, ONK0E 1T1, Johnstown, Ontario 613-340-5004 Categories of companies in Johnstown Air Conditioning Contractors & Systems Contractors - General Denturists Electrical Contractors Movers Printers