Johnstone Supply is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Air Conditioning Equipment Parts & Supplies
• Heating Units Manufacturers & Distributors
• Heating Contractors

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Heating Contractors
• Air-Conditioning And Warm Air Heating Equipment And Commercial And Industrial Refrigeration Equipment Manufacturing > Heating Equipment
• Household Appliance Stores > Air Conditioning & Heating Systems

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Heating Contractors
• Refrigeration & Heating Equipment > Heating Equipment
• Warm Air Heating & Air Conditioning > Stoves & Furnaces Equipment > Furnace Fittings & Repair Parts
• Household Appliance Stores > Air Conditioning & Heating Systems