Fiberglass insulation was included and no problems installing.
No these units do not. -GHP
Small or medium but the medium gives you more viewing area. -GHP
Please contact our Customer Service Team for support with your issue at 1-847-324-5900 or email at http://www.ghpgroupinc.com/CTUS.html -GHP Group Customer Support
If it is a prefabricated fireplace this unit will not work with it. If it is a masonry fireplace then a large will fit. -GHP
This hearth is beautiful! I bought one for my house and now one for my daughter's new home. Its easy to install and made my fireplace look more up-to-date. The outside height of the frame is 31" and the outside width is 37-1/2". As long as you don't have a custom fireplace I would suggest getting the medium size.
Those descriptions are under their respective products. Also the sizing is on the the chart in the photos . -GHP Group Customer Support
If those measurements were flipped it would fit but your width is not wide enough to be compatible with our units.
Yes, this will fit your fireplace nicely.
The overall dimension of the small fireplace glass doors is 37"W x 30"H -GHP Group Customer Support