Can the air sucked out by an exhaust fan from a room go back in through an open window on the second floor of the house? - Quora
![Amazon.com: HUGOOME Window Reversible Exhaust Fan Shutter Box Through the Wall Blower Ventilation Air Extractor for Bathroom Garage Greenhouse φ6 Inch : Tools & Home Improvement Amazon.com: HUGOOME Window Reversible Exhaust Fan Shutter Box Through the Wall Blower Ventilation Air Extractor for Bathroom Garage Greenhouse φ6 Inch : Tools & Home Improvement](https://m.media-amazon.com/images/I/61uzSFjrN8L._AC_UF894,1000_QL80_.jpg)
Amazon.com: HUGOOME Window Reversible Exhaust Fan Shutter Box Through the Wall Blower Ventilation Air Extractor for Bathroom Garage Greenhouse φ6 Inch : Tools & Home Improvement
Can the air sucked out by an exhaust fan from a room go back in through an open window on the second floor of the house? - Quora
![Suncourt ThruWall TW208P Room-to-Room Transfer Through Wall Vent Fan, 2-Speed Wall Vent Register Booster Fan, Quiet Operation, Improved Air Flow for Better Indoor Heating and Cooling, White - Multiroom Air Conditioners - Suncourt ThruWall TW208P Room-to-Room Transfer Through Wall Vent Fan, 2-Speed Wall Vent Register Booster Fan, Quiet Operation, Improved Air Flow for Better Indoor Heating and Cooling, White - Multiroom Air Conditioners -](https://m.media-amazon.com/images/I/61COUYzeLRL._AC_UF894,1000_QL80_.jpg)
Suncourt ThruWall TW208P Room-to-Room Transfer Through Wall Vent Fan, 2-Speed Wall Vent Register Booster Fan, Quiet Operation, Improved Air Flow for Better Indoor Heating and Cooling, White - Multiroom Air Conditioners -
![Please what does this fan do? Just bought a new house and the upstairs floor is always oven hot. A friend said it's supposed to disperse/suction out hot air but no idea Please what does this fan do? Just bought a new house and the upstairs floor is always oven hot. A friend said it's supposed to disperse/suction out hot air but no idea](https://preview.redd.it/please-what-does-this-fan-do-just-bought-a-new-house-and-v0-tv35enly31cb1.jpg?width=640&crop=smart&auto=webp&s=f8fac159c3bac20745c787daa598b0480cf91cfa)
Please what does this fan do? Just bought a new house and the upstairs floor is always oven hot. A friend said it's supposed to disperse/suction out hot air but no idea
![Upstairs shower p-trap freezes when temp falls below 0F. Only maybe 1" gap between plywood and trap. Was insulated, not enough to stop freezing. What can I do to help prevent future Upstairs shower p-trap freezes when temp falls below 0F. Only maybe 1" gap between plywood and trap. Was insulated, not enough to stop freezing. What can I do to help prevent future](https://preview.redd.it/upstairs-shower-p-trap-freezes-when-temp-falls-below-0f-v0-r06miqio9fy91.jpg?width=640&crop=smart&auto=webp&s=97c2869b7efa51fc647423493ccfcd646996608f)