D&D Heating and Air Conditioning, LLC provide complete sales and installations. We provide the highest quality installations to provide years of trouble free operation, while providing economical operation. Your comfort is our goal! We have been serving Connecticut and Massachusetts for over 30 years. Our mission is to provide our customers with the best products and services that are unique to them. We strive to keep our projects on time and within the customer's budget. Knowledge is important to us. We attend college classes, technical seminars, trade shows, and factory training programs. We are committed to keeping our customers satisfied and comfortable at all times..