DEPENDABLE was recommended by my new fuel oil company, Standard Oil. Sal was terrific. He came on time, looked over my whole house -- 1959 thru 2008 extentions, cobbled together heating and cooling systems, old furnace, etc. He gave me a price. His people showed up on time, did a very thorough job of searching out all the registers -- unscrewed the plates and washed them!, worked clealy and efficiently and were very nice. NO EXTRA CHARGES, no nonsense. I had put off having this done for years because you always get thoses envelopes with adds that promise $X per duct, etc., they come and you end up paying a ton of $$$$. Have had this with rug cleaning and chimney cleaning. From beginning to end, DEPENDABLE was first rate and I highly recommend them.