I have a fireplace and the dimensions are 29.5”h x 34” wide by 20” deep will this product work?

The minimum masonry opening is: 15 3/4" depth, 28 7/8" width and 23 3/8" height. There may be other requirements is a fresh air intake is required. Please refer to the Installation and Operation Manual on page 33 for more information. If you have any further questions, please call us and we will be happy to assist you.