Standard Size Bathroom Ventilation Window Height

This picture is contributed by persis 2.

Standard size bathroom ventilation window height.

Usually taller doors are used with ceiling height 10 or more. But in a room deeper than 12 feet that band of wall pinches the view and it s silly to keep the top of the window at 6 feet 8 inches with newer 9 and 10 foot ceilings. Thus installed window gives fresh air to the bathroom. That basic formula for an average size bathroom needs a little tweaking if the ceiling stretches past the standard 8 foot height.

Standard fan sizing. Mechanical ventilation system bathroom exhaust fans ceiling mounted exhaust fans for bathroom. Standard double hung window sizes are 24 inch by 36 inch 24 inch by 46 inch 28 inch by 54 inch 28 inch by 66 inch 28 inch by 70 inch 34 inch by 46 inch or 34 inch by 62 inch. If you have transom or using taller doors then this changes.

Casement window sizes range 1 ft 2 inches to a 2 ft 11 5 inch width. Casement windows height range from 2ft 5 5 inches to a maximum of 6 ft 5 5 inches tall. Basically the 15l s or 54m3 hr refers to the measurement of how much old air is replaced by new air. The window should be proper having a size of 3 x2.

Otherwise the top of the glass should reach at least 76 inches 193 centimeters above the floor. It s properly installed giving full ventilation to the space. You may want to coordinate the height with the tiles or other wall finishes or with the height of the windows and doors in the room. It is pretty much standard for bathroom exhaust fans to meet these requirements though it should be stated in the product description of your fan.

Showers that have a steam function need to be completely enclosed as seen here. Bathroom vent fans are rated for the amount of air they can move measured in cubic feet per minute or cfm. Don t be afraid to set the top of the window clear up to the cornice trim. They re more effective for ventilation purposes than double or single hung windows and they re comparable in price.

My understanding is that top of the window is set at 80 6 8 which is the standard door height. As with single hung window sizes any size other than those listed for standard double hung windows would be considered specialty or custom sizes. That way door trim and window trim line up. Look for more power if your bathroom has high ceilings.

With a standard wall height of 8 feet that leaves a 16 inch gap between the top of the window and the ceiling perfectly sized for standard headers and plates and accommodating of even the biggest window trims and cornice moldings.