Night Vent

NIGHT VENT — a one-day heatwave puzzle

One apartment, three rooms, one punishingly hot day. Choose when to invite cool morning air inside, when to seal the windows, and where to spend nine units of fan power. Keep all rooms below 33.5°C at 22:00 while avoiding 36°C and cumulative heat strain.

HOW TO PLAY

Press Start Day. Time advances automatically; Pause lets you plan, and Next Hour advances one hour manually. Use each room's Window, Shutter and Fan controls. Outdoor air helps only when it is cooler than the room. Lower shutters before the hottest sun and save fan power for the hottest space. Restart begins a new attempt. Mouse, keyboard and touch are supported.

THEME: CANICULE

The outside heatwave rises to 43°C. Each room has a different orientation and solar exposure; airflow, shade and limited electricity determine survival.

AI AND ASSET DISCLOSURE

Created with OpenAI Codex assistance. Generative AI was used for game design iteration, HTML/CSS/JavaScript code, English writing, and original room illustrations and cover art generated specifically for Night Vent with OpenAI image generation. No purchased game assets or third-party gameplay libraries are used. Optional Google Fonts have system fallbacks; the game logic runs offline.

Made specifically for Game Jam des Puys 2026 by estona815. Free to play.