Temperature has a massive effect on the quality of your sleep.
Manual Vents
Ventilation is crucial when attempting to keep the correct room temperature.

9" x 6" White Plastic Adjustable Hit and Miss Air Vent Grille with Flyscreen Cover
4.0

MAP Plastic Louvre Air Vent 9" x 6", Double Brick Grille Cover with Flyscreen (229mm x 150mm), White
5.0

9" x 3" White Plastic Adjustable Hit And Miss Air Vent Grille With Flyscreen Cover
4.0