Abacus installed our new A/C and new ductwork and did an excellent job. We had them back later to install a new electrical panel and again a great job. They recently came for the A/C 6 month checkup and installed a new filter free of charge. Their staff is very professional and knowledgeable. They are always on time and give you plenty of notification when they will be there. They are a little pricey but it's worth what you get. And I LOVE the booties on the shoes before entering your house.