Indoor Environmental Services (IES) is a full service Mechanical Contractor involved in the design and construction of HVAC systems, Industrial Refrigeration systems, HVAC and refrigeration service and maintenance, as well as complete Facilities Solution Projects for various commercial, institutional, industrial, agricultural and health care facilities. IES has been in business for over 16 years. The majority of our work is obtained through referrals and a considerable amount is negotiated. We have three offices with a staff of over 100 employees including dedicated Project Managers, Estimators, Registered Professional Engineers, field construction, controls and service technicians. We fabricate ductwork, fittings and sheet metal parts at our Sacramento and Santa Rosa facilities; we fabricate chillers and piping systems at our Napa facility. Indoor Environmental Services (IES) takes pride in our reputation for providing quality work throughout Northern California. Our business philosophy promotes quality, honesty, and value. This is a commitment that every employee understands and incorporates in their daily tasks. This philosophy allows IES to operate as a part of our customers' project team from the beginning, assuring a continued integration of efforts saving time and money for the owner/developer and/or General Contractor and ensures the highest possible quality result. We strongly recommend a Team approach between the trades throughout design and construction. Our experience shows that this method increases communication, productivity and quality of construction.