A:AnswerTypically they charge for installation but it’s very easy to install, even myself which I have never done it. Watched a you tube video and went for it. Takes only couple minutes.
A:AnswerThe same thing happened when we tried to use it. Hubby didn’t see a good way to make it work. Was concerned that if they were put back in, they might fall out without us knowing and the vent would overheat. We returned this item.