I looked at the Marvin website and Googled everything I could think of for screens for this type of window and came up unfortunately blank!

Hopefully someone with "window experience" will chime in.

I have Renewal by Andersen windows, some casement that swing out, some that slide side to slide. The sliders by necessity have external screens, but the casements have internal screens that just pop out by releasing two clips on either side. I can't imagine that Marvin doesn't have a similar set up for their casement windows.

Marvin Ultimate has a "French Crank Out" operation listed on the web site. (See image from https://www.marvin.com/products/windows/casement/ultimate-casement-window?operationType=frenchCrankOut) Whether they are hard to get or incredibly expensive, I don't know.

I could live with the swing-in screens if I had to do so. I would still like it if they posted images of the setup. :)

Marvin makes several window collections of which the Ultimate appears to be the most expensive. However, you don't have to buy an Ultimate casement window to meet egress requirements. For example, the basic Essentials Casement CN 2640 meets the national egress requirements.* The smallest Ultimate French Casement Push Out that meets egress requirement is the CN 3648 while the smallest Ultimate French Casement is CN 4040.

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*National Egress Codes requires 5.7 SF clear opening. 20" (508) clear width and 24" (610) clear height, not to excess a floor to sill height of 44".

--not an expert

It isn't so much the egress requirements that concerned me as how the screens work. We finally were able to reach a Marvin retailer, but even they seem to be a bit vague on how the screens are attached and maneuvered. They are supposed to be trying to get us some images, or even better a showroom to visit to see one in action. We are still waiting.

From CoPilot Ai:

Question: "Where is the screen located on a Marvin Essentials casement window?"

Answer:

The screen on a Marvin Essentials casement window is mounted on the interior side of the frame, not on the exterior. You remove and install it from inside the house.

Precise location and orientation

• The screen sits flush against the interior stop of the window frame.
• It covers the entire opening where the sash swings out, so when you crank the casement open, the sash moves outward while the screen stays fixed inside.
• Marvin Essentials casement screens use interior clips/springs along the perimeter. You pull the screen slightly inward to release it.

Why it’s inside

Marvin’s casement design (including Essentials, Elevate, and Signature) places the screen inside because:

• The sash opens outward, so an exterior-mounted screen would interfere with the swing path.
• Interior screens allow easier removal for cleaning.
• It protects the screen from weather exposure.

Here is a picture of a Marvin Ultimate casement window in a house I am building. I don’t have the paperwork with me to see which “opening” type it is, but I expect the screen set up is the same in everything but the push out type. You can see that the screen is inset above where the crank will ultimately be attached.