This is as described in other reviews. Quiet. Quality fit and finish. Sharp edges. I would recommend this.I used a Sonoff wifi enabled switch to avoid running a switch. I could tap into an existing circuit in my crawlspace. "Alexa, turn on the vent."This takes a lot of diy skills but nothing too hard. Moderate to install. (Final wiring is work in progress.)I bought a non heated unit and installed it in a crawlspace. Giving the warmth category a rating is bizzaro and not relevant.Single issue I had is that screws for the electrical enclosure are too long and difficult to install.