What profile should to choose for a large single-pane windows in an old house?

The house is an old 1920s house, the window openings are small in width – about 900x1900 mm or 1000x2000 mm. I would like to do it with one window sash to make it lighter, without a central lintel. What profile should I choose to hold such an area of glass?

At first we thought of Kaleva Deco, because it has a thinner frame and more glazing area (more light). But a little understanding realized that the gain on the width of the frame is not so noticeable, about 1-2 cm, and probably will not play a big role?

The windows are in the yard, so additional noise insulation is probably not very necessary.