Just because pros did the install you need to make sure it was done right just the same, I used one of the best pro guys near me because of there good reputation, its funny that these guys will take your money on the install but you can never get them to return a phone call for anything after they leave, took me SEVEN months to get replacement fire bricks I was told would take a week, when I had my chimney guy sweep it after two and a half seasons he told me that they installed the top cap upside down and did not install a storm collar on the flex pipe at the top, so much for "PROS" doing the install, I should have gone up on the roof before I wrote them a check, my chimney guy called the guys who put it in and they were going to call me back later that day and I have since called them twice and still no return call. This happened Dec 19th. LOL now when some one is looking for an installer these guys get a bad report from me and I send people the other way!! I thought these guys were great because when they were getting a $2700 check to install the stove they were right out and did what I thought was a great job. The job they did inside was so nice I never thought about looking at the roof, next time I will check I learned a lseeon this time. Even when I would check the liner for creosote build up I never knew what I was looking at up there just check the pipe and climb down, looked good to me, but after my chimney guy explained what I was looking at reading all the stuff on these boards its so easy to educate yourself, So much for the Pros!! Make sure you get what your paying for and get a liner that goes from your insert all the way up the chimney they are easy to clean and give you the best possible draft, you'll be glad you did good luck!