I called Service First of Adrian, Mi because the back of my house was always cold in the winter. They saw my duct work was to big. They replaced the duct work with one that was smaller allowing te heat to flow better throughout the house. I instantly noticed heat flowing better in he house and our gas bill lowered approximately $64 a month because of their service call. I recommend them to anyone. Doug the owner and Mike his employee were very professional, courteous at all times. They even cleaned their work area better then when they came. I've also used them for a furnace repair. I had the same great service. I'm about o use them for my home remodel to relocate my cold air returns and heating registers. Simply put, Service First is a awesome company.