VentiLo Home Ventilation

Know when to open your windows. Enter your room's temperature and humidity, and VentiLo compares them with the outdoor air to show the best times in the next 24 hours.

Know when to open your windows, not just what the weather is doing.

VentiLo compares the indoor temperature and humidity you enter with outdoor conditions and gives you a clear recommendation: open the windows, air out briefly, keep them closed, or no strong preference either way.

It automatically determines whether airing out right now would cool the room, warm it, reduce humidity, add humidity, or whether nothing is needed. A simple 24-hour timeline shows the best upcoming moments to air out.

At a glance, you also get: • current conditions • hourly and 7-day forecasts • humidity and wind • local outdoor air quality

Choose your city or use your location, then enter your room's temperature and humidity. VentiLo does the rest.

Free, with no ads, no in-app purchases, and no account. Your settings stay on your device.