Innie/outie window operation
I am familiar with much of the conversation regarding thermal performance as it relates to innie/outie windows (https://www.greenbuildingadvisor.com/blogs/dept/musings/innie-windows-or-outie-windows). My concern here relates more specifically to operation of innie/outie windows as well as “middies”.
My concern is as follows:
It seems that “conventional” windows on regular houses are either double-hungs, sliders, single hungs, casements, or awnings, all of which swing outward or slide in one plane.
This works well in conventional, ie code-minimum style, construction in that the window is on the outside of the frame and then swings outward (in awning or casement) or slides up (or to the side) in hung windows and sliders.
Conversely, thick European windows maybe are often installed as innies… or close to innies… so the tilt turn operation which brings the window in like a hopper or swinging in like a door seems ideal.
But in a “middie” window, which to some extent is the conclusive ideal in the discussion following the article linked above, I am confused about window operation.
It seems like the surrounding window frame on a “middie” window in a thick wall will greatly reduce airflow in either outswing or inswing operatoin. In fact, a slider or single hung seems like the best way to get a maximum opening for airflow in this condition, but I am well aware that this is basically a no-go from a thermal performance / air sealing standpoint.
In the detail attached, even if the exterior trim were to be reduced in width, there is ~5″ of surround on both the inside and the outside of the window. It seems to me this will inhibit airflow regardless of whether the window swings or tilts inward or outward, and I know I don’t want a double hung or slider. Am I overthinking this? Will people just open the windows more? This seems a particular problem for tilt/turns because they only open a certain amount in the “tilt” mode.
I’m certainly leaning away from tilt/turns for this reason, and back to casements and awnings.
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