Calculating Ventilation Square Footage Of Awning Window

Measuring you only need to look at two things when considering how to measure for an awning.

Calculating ventilation square footage of awning window. For every 10 feet of floor area you need one foot of natural light area. A simple double hung window captures only the air flow which directly enters it. A three foot by four foot window would provide 12 square feet of natural light to the room again the required minimum. Near ridge of the roof.

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2 figuring ventilation is much easier. So for a 2 story house the n value should be 18 4. Awnings that face west the point drop of the awning should be 1 2 the height of the window for the best coverage. Awnings that face south and east the wall height of the awning should be 1 2 the window height.

If you had an egress window that has a clear opening of 24 x 48 or 8 square feet. Multiply the two numbers together. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. As wind encounters a structure it has to flow up or around the object.

The calculation for the n value is actually pretty complex but this table is a good approximation. Awnings and awning type windows serve to catch this upward flowing air and direct it into the open window. For ventilation the window s clear open area in square feet must be at least 4 of the total floor area that the egress window is servicing. Awnings are primarily air scoops.

Divide the result by 144 to get the resulting square foot measurement. Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. You will need a space that is both tall and wide to accommodate your new addition. That would be able to service an area no greater than 200 square feet.

The projection of the awning is usually determined by the height of window or point drop unless a crank out window. Survey the area where you d like to install the awning. 8 square feet 4 of 200 square feet. So for our 2 story 3 bedroom 2000 square foot example house with 2 full bathrooms and one kitchen the average door blower result was 1500 cfm50 the infiltration credit is.