Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: what is the inside dimension if I were to mount this between the studs?
Document: We have to return it because it does not fit into the size. The product description on the demension is referring to the outer edge, but tehre is also a inner dimension where the frame need to be installed inside the wall but it never indicates on this product.
Item is still being installed. I Built a frame with 2x4s and rabbit wire on the inside. Made of all metal. Appears strong.
We mounted this inside the window frame with some creative designing. This allowed the house architecture to stay in tact.
The Gable Mount Powerd Attic Ventilator is a good buy, if you as a customer get the package in one piece. It came all bend and dented. Not happy with amazon at this point.A Osorio
This shutter is well made and performs as stated. If you make a box frame for the shutter, most any attic fan can attach to the inside of the box. It is not necessary to use this shutter with a Broan fan.
Super great quality & works great! It was easy to install with an excellent instruction book! Great  ventilator for our outdoor shop & also purchased Broan 35316 1600 CFM Gable Mount Powered Attic Ventilator!
In actuality they are 19&#34; x 19&#34; outside dimensions by 16&#34; x 16&#34; inside dimensions, just what we needed. Packing could have been better, There was a lot of paper stuffed on top of the two smaller boxes, nothing on the bottom, and damage to the bottom of the shipping box.
Just what I needed
I am very happy with this product. It works as advertised. Fast shipping. What more can you say about a boring shutter?
I solved the issue by epoxing steel washers to the back of each louver to make increase the mass.
Answer: no