I didn't have my generator installed by Dodrill (I would have had I known they had them) but they are the authorized company for the maintenance of Generac Generators, which mine is. The workers at Dodrill do a great job servicing my generator which gives me a sense of security knowing it's ready for power outages. They are prompt and respectful. I definitely will continue having Dodrill take care of my heat pump and generator. I also have had my ductwork cleaned and a humidifier installed by Dodrill.