Since 1948 Cotti-Johnson has developed a reputation of quality, reliability, and expertise in the areas of HVAC and Electrical services for commercial, industrial, and residential customers. As a locally owned business serving a large portion of Massachusetts and Rhode Island, the company provides project design and installation, system upgrades, indoor air quality, preventative maintenance and 24 hour emergency service. For over 70 years the company has been committed to exceeding customer expectations and doing things right with licensed, professionally trained, and experienced service technicians.