Penn Air

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

• Ventilating Systems Cleaning

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Ventilating Contractors > Ventilating Systems Cleaning

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Ventilating Contractors > Ventilating Systems Cleaning