Will a push out window or half slide window cool down a room faster?

[questionboy]

If you have a push out window the whole area is open but much of the wind is blocked depending on the angle. With a slide window you often have half the open area but you can get direct wind over 180 degree angle.

Which one will cool the room down faster under which circumstance? If there is no wind will the push out window let more hot air out. If there is moderate to high wind will the slider let the wind bring down the temperature?

 

[sophiecentaur]

It all depends upon the direction of the wind and the angle of the hinged window. It could be better or it could be worse. Aerodynamics is a complicated business.
I guess that with no wind, a hinged window wouldn't be very different from a slide opener.

But how would you compare the two , if you're comparing their performance when only slightly open - what numerical degree of 'openness' would you assign to each one? What angle would you have the hinged window - the optimum, each time? The only time you could do a fair comparison would be when both are shut and you could then compare the draught-proofing properties (glazing area and spec being equal).