When I called Dupont Heating they scheduled and in-house free of charge quote immediately. Pat came to my house and gave me a very educational info session on Carrier air conditioners and furnaces. I was extermely grateful for all the info since it allowed me to make an educated decision as to which units I was going to purchase. Other companies gave me quotes over the phone (not in writing) or never described exactly which units they were going to install. The following week the Dupont Heating installers came to my house at 8:30 am promptly. Mario, Sam and Samy installed my air conditioner and furnace quickly and neatly. They went above and beyond their responsibility by reinstalling some exhaust pipes to allow for more headroom in my furnace room. I would highly recommend Dupont Heating to anyone who needs a new air conditioner or furnace. THANKS GUYS!