Dave in London

If they call you up hang up and save your money. They don't know what they are doing. There truck leaked gas all over my driveway, they didn't know how to hook up the hose to the furnace and they spread dust all over. The vacuum could not pull the air thru the vents. The used a broken camera to try and show me the vents before and after. I couldn't see anything because it was out of focus. Save your money and hire a company that can do the job.