National Geothermal Corporation

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

• Geothermal Heating & Cooling Contractors
• Heating Contractors

North American Industry Classification System (NAICS) Categories:

• Plumbing, Heating, And Air-Conditioning Contractors > Heating Contractors
• Plumbing, Heating, And Air-Conditioning Contractors > Geothermal Heating & Cooling Contractors

Standard Industry Classification (SIC) Categories:

• Plumbing, Heating And Air Conditioning > Heating Contractors
• Plumbing, Heating And Air Conditioning > Geothermal Heating & Cooling Contractors