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Ventilate · At the right time
Beat the heatwave: when to open, close, and use a fan
Ventilate helps you stay cool during heatwaves with calm, practical guidance. Set up your windows once, add your indoor temperature (a thermometer helps but is not required), and get clear advice on when to close windows to keep heat out, when to open for fresh air, and where to place a fan so cool air reaches you. Uses local weather and your window directions for per-window recommendations, plus gentle reminders and a heat toolkit.
Hi Product Hunt 👋
In 2019, during the first big heatwave in Paris, I remember how exhausting it already was. In 2026, after four more heatwaves, I saw how much harder it gets for people without air conditioning. Cooling down at home is not obvious, and every window decision feels urgent when you are tired and hot.
That is why I built Ventilate: a calm guide for heatwave days, when to open, when to close, and where to put a fan so it actually helps.
Heat is still hitting Europe hard, and I keep meeting people who open windows at the wrong hour or miss the short evening cool-down. Small habits make a real difference.
What Ventilate does today:
• Per-window advice based on your home layout and local weather
• Next action times, so you know what matters now
• A heat toolkit with practical guides, plus widgets and reminders
Android and iOS apps are live on their respective stores.
The app is in active development, and I am building it as part of RevenueCat’s Shipaton hackathon. I would genuinely love your feedback, especially if you live in a hot European city without AC.
Question for you: what part of summer heat at home feels the most confusing today, timing your windows, fan placement, or something else?
Thank you for being here early. I will be in the comments all day.
Bathilde
Curious if it works anywhere in the world, also if it support Celsius as the scale.
About Ventilate · At the right time on Product Hunt
“Beat the heatwave: when to open, close, and use a fan”
Ventilate · At the right time was submitted on Product Hunt and earned 18 upvotes and 2 comments, placing #16 on the daily leaderboard. Ventilate helps you stay cool during heatwaves with calm, practical guidance. Set up your windows once, add your indoor temperature (a thermometer helps but is not required), and get clear advice on when to close windows to keep heat out, when to open for fresh air, and where to place a fan so cool air reaches you. Uses local weather and your window directions for per-window recommendations, plus gentle reminders and a heat toolkit.
Ventilate · At the right time was featured in Android (57.4k followers), Home (170.2k followers), Climate Tech (13.1k followers) and Tech (629.9k followers) on Product Hunt. Together, these topics include over 224.2k products, making this a competitive space to launch in.
Who hunted Ventilate · At the right time?
Ventilate · At the right time was hunted by Bathilde R. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Ventilate · At the right time stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Bathilde R