Two thumbs up to ACA! I had them out for my semi-annual checkup after being recommended to by a neighbor. It was very apparent that the gentleman who came out knew what he was doing. When done he gave us an understandable explanation of things that we'd need to keep our eye on for in the future and didn't try to sell me anything i didn't need! My husband was even pleased and thats a rare occurance! LOL We signed up for their 'energy savings aggreement' which my neighbor had also recommended which will be nice having them call us in the fall and will take another thing off my to-do list! thank you ACA i look forward to having you out in the fall and will recommend you to others in need!