6" Can Fan GL56736746 736746 - Compact & Powerful Cranberry Red Fan for Home, Office, Kitchen, and Dorm Rooms - Perfect for Cooling Small Spaces

I bought this as a booster to in a home furnace/AC. My home was built 40 years ago, before zoning was common. The blower unit is in the basement on south end of house, farthest bedroom is on 2nd floor north. On top of that, the ductwork in walls and floors takes 5 90 degree turns before reaching the room, so the room was hot in summer, cold in winter. I bought this fan because I knew it would move enough air, and while not designed for very hot air, the construction would handle air that was no more than 90 degrees by the time it reached fan.To install it, I placed it in basement as far from the furnace as possible, removing a piece of rigid duct and securing either end of the fan to existing ductwork with insulated flex duct. The blower is not rigidly mounted but suspended by wires from the joists, to minimize noise transmission. It turn on and off with an air-operated switch https://www.amazon.com/gp/product/B002EC1O0C/.Does it work? Beautifully. Noise is fairly low, and the unit is powerful enough that unless set on the lowest speed, it will blow the metal register out of the hole in the floor.