Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: What size hole is required for installation?
Document: I have not installed this vent as yet as not required at this point in time. The vent has a good finish and I cannot see any problem with it.
Works as advertised. Hasn't let in a drop of rain, even here in the soaking Pacific North-West. The clear window makes a bonus skylight as well, as more light below is always nice. Doesn't snag any lines on deck. And stays nice & secure to the fibreglass deck with nothing more than Sikaflex 291. That's right, I didn't use a single screw through the deck. Be sure to position the drain hole on the low side. I bought these with the stainless trim ring which is a great match.
Bought this to place in the Vbirth on my sailboat.I had a 4&#34; access plate already and just removed the lid and used  3m 5200 sealer to glue this vent in place, no screwing thru the deck required. If the weather gets bad enough that the water over the bow ripps this off I imagine I will be pretty close to doomed anyway..  :)Love the vent. Not only does it allow air circulation the frosted window allows light up in the bow. The bowels of the boat seem less dank and uninviting.
Yeah... stupid me. I thought it had solar cells and a motor with a fan.It doesn't.It's a vent and that's it.Oh, so you think you can add in your own solar cells and motor with fan? No, you can't. It's just a vent. A nice sealed vent that you aren't getting open without breaking.
That's astonishment!outer case only, not include substance.I want say &#34;get buck my money&#34;.I believe other comments is unreliable.
Ordered, received and inspected. It looks like nice construction and well made. However, when I tried to order the inside and outside trim parts it turns out the company no longer makes this product or related items. Thus, this vent would have been nice on my boat but since I can't trim it out its worthless to me. Kinda upset with Amazon for selling this product as its related items are not available by the manufacturer. Thus, don't waste your time; don't buy it. I had to return it and hence begin the wait to get my money returned from Amazon (whole thing is a waste of time).
I had a problem on my small 19' daysailer with condensation in the cuddy. After installing this unit the temperature in summer was less, the air exchanged more often, and substantially reduced condensation in rainy months. I'd say the cuddy could breathe much better with only this small, fanless unit. A Nicro 24/7 battery/fan combo is always going to be better for venting. However, this worked very well.
Answer: yes