window
True hydronic baseboard heat has an opening at both the top and the bottom of the wall unit with a finned copper tube running down its length. Because hot air is less dense than cold air, the hot air naturally rises. As heat is absorbed in the air surrounding the finned copper tube, it rises and flows out of the opening at the top. (convection) As this warm air leaves the heater it draws cooler air into the bottom opening which is then heated and flows out the top continuously as long as there is heat in the finned copper tube.
To seal water and air tight the cap on the end of plastic sleeve that goes through the inside wall to the outside wall.
It's not a question of opening size but a question of loading over the opening. No load, no lintel. If a 12 inch opening is capped with a 16" block, the block is the lintel. If an opening is between wall studs there is little need for anything that would be called a lintel. Anouther name for a lintel is a header. There is usually some kind of header over an opening. A lintel's size and integrity is determined by the load it will support.
door surely
An opening in a wall to let in air or light is called a window.
An opening in a wall to let in air or light is called a window.
window
not at all
to let your butt get air
The opening of the Berlin Wall signified the closing of the Cold War.
The opening of the Berlin Wall signified the closing of the Cold War.
The antonym of wall is opening because a wall is a barrier and an opening isn't the way-VLE : )
A wall opening could be a serving hatch, a window, or a door.
A window air conditioner must be fitted in the window. The back end generates hot air and some drip water. Some can fit in a wall but still the back half is outside.
Try opening the window to let some cool air through. This should help.
Window.