Air Temperature Service LLC has been installing heating & air conditioning systems in Middlesex & Worcester County for over 30 years. We Specialize in high-efficiency Energy Star Systems and offer Manufacturer & Utility Rebates. We have always given Free Estimates & always will. We also provide 2-year labor guarantee on all our installations, and as much as 10 years on parts. Our prices are extremely competitive and we go above and beyond to make sure your experience with our company is a great one.