A:AnswerYes it could. It needs 24 inches tall opening and window opened 6 inches. But it is preferred there be a window screen outside. If not, get some screen material from hardware store or Walmart and attach a piece over the openings across the back side of it before installing. I personally did not have any screen so I occasionally have a few unwanted moths and mosquitos to deal with but it's near my desk so I keep a fly swatter handy. Soon I will take it back out for the hottest part of summer and install screening myself. I hope this helps. My idea is to hot glue the screen the the fan.
A:AnswerThe Portal Window Fan is designed for horizontal installation only. Using it in the vertical orientation can put a strain on the motor and could affect the output and longevity.
A:AnswerThe Transom Fan draws fresh air from the outside in — or reverses electronically to exhaust stale air out. It is a fan, not air conditioner. Whatever the air temperature is outside, is what it will bring inside.
A:AnswerIf you leave it on when you unplug it, I think it will be on when you plug it in. It's no longer the season for me to use it now so it's packed away.
A:AnswerThere can be a major draft through the unit when the wind blows. Cold air in, warm air out if not covered with plastic. Also I would not recommend having the unit exposed to freezing winter weather as it could damage the unit. So I would definitely take it out and close the window as I'm about to do just that with mine.
A:AnswerI have included a link to view the user manual. Cleaning instructions are on page 13. https://www.sihomecomfort.com/wp-content/uploads/2021/06/PORTAL.pdf
A:AnswerI can't intelligently speak on the numbers you requested but can tell you it is not a loud fan and the flow rate is phenomenal for it's compactness.
guessing I would say around 150 cfm or so.
as far as noise goes I had a rattle on the window that was louder than the fan
