Yes, certain types of small air conditioning units can be installed in rooms without windows, such as ducted systems or ceiling cassette units. These units do not require a window for installation as they are integrated into the building’s structure. Ducted units, for instance, are hidden above the ceiling or below the floor and only the vent grills are visible in the room. Ceiling cassette units are installed flush with the ceiling and distribute air centrally from that point.
However, portable air conditioners, which are commonly used as small units, typically require venting through a window to expel the hot air generated during the cooling process. If a window is not available, alternative venting options such as through a wall or into an adjacent room with more ventilation might be necessary. It’s important to consult with a professional installer to understand the best type of unit for your space and to ensure it meets your air conditioning needs effectively.