CSI Engineering 10 months ago ID: #782263 Listed In : Building and Construction 125 Aviation Ave, Suite 4, Portsmouth, NH 03801 606-773-1661 https://csi-engineers.com/ [email protected] Business Description CSI Engineering LLC has been in business since 1996 and offers consulting services in the following fields: HVAC, Electrical, Plumbing, Fire Protection, Mechanical and Electrical Systems Assessment, and Energy Studies. Reviews & Ratings Write a Review No Review. Please login / register to add your review. Tags : HVAC Electrical Plumbing fire protection Commissioning Mechanical and Electrical Systems Assessment and Energy Studies. and Engineering