Alignment during window installation, keyword: drainage?

Hello everyone,

I am currently building a garden house (dimensions 4x4m). To get some light in, I could get 2 windows cheaply.

One (160x50cm) is originally intended as a transom window by design. For the other one (200x50cm), you can see from the position of the drainage slots that it is originally a floor-to-ceiling window or should be installed vertically.

Now to my question, are there any concerns about repurposing the latter window as a transom window, so that the drainage slots are on the side instead of the usual bottom? Are the drainage channels inside the window frame essentially continuous? If so, would it be possible to drill new drainage slots afterwards?

Best regards
Buddler

How do you want to open a planned vertical window horizontally?

In the other one (200x50cm), you can see from the position of the drainage slots that it was originally a floor-to-ceiling window or intended to be installed vertically.

With fixed glazing without a sash, you can also install it horizontally and drill drainage slots. You have to remove the glass anyway for installation. Then close the other original openings and re-block the glass accordingly.
The window sill connection, as previously existing, is naturally omitted and the installation must be done with some brainwork regarding sealing and slope to the outside.

With fixed sash or tilt-and-turn sashes, it basically works too, but the blocking must be adjusted accordingly and the window will swing towards you when opening. Overall not a good idea.

How do you want to open a planned vertical window horizontally?

As dertill already wrote, it comes towards me on the inside when opening. I know it's not the optimal solution, but it's just a garden shed. I would install a kind of stopper device on the inside, practically as a stop.

I once saw someone put chains on the top. Not pretty but practical.