According to our records, this business is located at 42a Southgate Blvd. in New Castle (in New Castle County), Delaware 19720, the location GPS coordinates are: 39.691843 (latitude), -75.573539 (longitude). National Hvac Service Ltd is categorized under Warm Air Heating and Air Conditioning Contractors (SIC code 1711). Known organization general manager is Pat Cunningham. You can contact the company by phone at (302) 323-1776.