Our air conditioner died right before the hottest day of the year (Go Figure!). We called Zenner & Ritter to come and take a look. Our system was old so they helped us pick a new Air Conditioner, Furnace, and Hot Water Heater. They only suggested quality brands that were easy to research. Our estimator and subsequent Technicians/Installers also made a point of listening to my concerns about uneven comfort in our house depending on the season. They took a look at my duct work, made the necessary modifications, and took the time to instruct me about how to set the dampers depending on the season. Awesome all together. 5-Stars!