A bright hotel-room photograph tells you that there is a window. It does not tell you whether the window opens. Some rooms have fixed glazing, others allow a small restricted opening, and some properties have different arrangements on different floors. If fresh-air access affects your choice, ask about the room you are actually booking.
Make the question specific
Instead of asking whether the hotel has opening windows, name the room category and dates. A useful message is: “Does this room type have a window that guests may open, and is the opening restricted?” Ask whether that feature can be confirmed or is only a request subject to allocation.
The distinction matters when a property has an older wing, a newer extension or rooms facing an internal space. A helpful answer about one room is not necessarily a promise about every room sold under a broad description. Keep the reply with your booking confirmation.
If the window cannot open, ask how ventilation and temperature are controlled. Air conditioning, a fan and an opening window are different features. Avoid assuming that one description guarantees the others. A room with a balcony may also have its own access conditions; clarify those separately.
Check again at arrival
Before unpacking, look at the window and the room information. If something does not match the written confirmation, raise it with reception while a room change may still be possible. Describe the difference calmly and ask what alternatives are available.
Never force a stiff fitting, remove a restrictor or use an object to defeat a safety device. Ask staff to demonstrate the permitted operation. An unfamiliar latch is not an invitation to experiment, especially above ground level.
For a short trip, the answer may simply change what you pack or which room you choose. When an opening window is a firm requirement, resolve it before a non-refundable booking. A precise question is far more useful than trying to infer the hardware from a wide-angle photograph.