Business Description: United Service Specialists has been servicing the Washington Metropolitan area for almost 40 years as A.B. Chelini. We have recently changed our name in a rebranding effort and will be adding more services to our commercial and residential departments over the next year! With United Service Specialists, you can always be assured of quality workmanship and attention to detail. With over 150 years of combined experience, we proudly combine state of the art service with cutting edge products and old-fashioned customer care. Many of our technicians have been part of the USS / Chelini family for over 20 years and help train our new technicians, facilitating continuous quality. We are constantly continuing our education through classes, certifications and licensing. We can service all brands of air conditioners, furnaces, heat pumps, boilers, geothermals, water heaters and other equipment providing reassurance that you will get the best options to meet your needs. What sets us apart is our attention to customer service. From setting up your appointments and the work performed to the warranty we stand behind we are committed to surpassing your expectations. We are pleased to offer a call ahead appointment time so you are not waiting for us to show up as well as maintenance agreements so WE can take care of your systems so you don't have to! With 24-hour emergency service, you are never without help.