As warmer weather approaches thermostats are being switched from Heat to Cool in homes across the country. The satisfaction of knowing your system is ready and will be there to cool your house down to a comfortable temperature when it gets unbearable outside.
These desires for a comfortable house is not necessarily the same in every room especially bedrooms. In a perfect house every room will have a supply vent (where the air blows) and a return vent (which will have no feel of air movement but sends the air back to the air handler) with this setup the cooling will work perfectly.
Unfortunately most homes do not have returns in the bedrooms which means that when the bedroom door is closed there is no way for the hot air in the bedroom to return to the air handler (furnace) where it will be cooled again.
In bedrooms that do not have a return vent there needs to be a gap of at least one inch between the bottom of the door and the and the floor to allow the warmer air to be sucked back to the return vent that is (probably) in the hall ceiling.
So if your bedrooms do not cool as well as the rest of the house check the space between the bottom of the door and the floor.
If you want to further improve the return air flow from your bedroom cut a hole through the drywall on both sides above the bedroom door, cover with a decorative vent (cover) that allows air to pass through and you have a better solution than the “short door” method. This is an easy DIY project.