Diffusair

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

• Heating & Ventilating Contractors
• Ventilating Consultants

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Ventilating Contractors > Ventilating Consultants
• Plumbing, Heating, And Air-Conditioning Contractors > Heating Contractors

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Ventilating Contractors > Ventilating Consultants
• Plumbing, Heating And Air Conditioning > Heating Contractors