This company has been a pleasure to deal with. All the people I have dealt with at Delta from office staff, installers, sales reps and service reps have been extremely friendly, knowledgeable and professional. I even received a significant discount on my most recent install simply because I have been a loyal customer. They show up on time, do quality work with no surprises and leave the place clean and tidy. I would not go anywhere else for my heating and air conditioning needs and I recommend anyone reading this review to strongly consider this company when considering which heating and air conditioning company to choose. They really seem to care and appreciate their customers.