This vent with built-in fans to heat or cool the room quicker. : r

QA-Deluxe 3300 CFM Energy Efficient Whole House Fan Includes 1-Speed Remote Control QA-3300R - The Home Depot

This vent with built-in fans to heat or cool the room quicker. : r/mildlyinteresting

Use your ceiling fan to heat a room during cold weather : r/lifehacks

Air conditioning - Wikipedia

Is It Ever Helpful to Use a Powered Attic Ventilator? - Energy Vanguard

Tilta Cooling Kit for the Canon EOS R5 Review– Does it actually work? - Newsshooter

Use the Thru-the-Wall room to room fan to move cool air in the summer & warm air in the winter. The Thru-the-Wall fan features an easy to install

Thru-the-Wall Room to Room Fan - 2 Speed

30 Tricks to Cool Down a Room and Sleep in the Heat

How to Keep Your House Cool Without A/C