Should I open the windows?

Compare indoor and outdoor conditions to see if natural ventilation makes sense right now. Recommendations assume heating and cooling are off.

Home information

Set once -- location drives sunrise and sunset; building details and your comfort range refine recommendations and the temperature outlook.

68°F-78°F

Recommendations assume you want to stay within this range and keep indoor humidity at or below about 50% when possible -- above that often feels stuffy even at a comfortable temperature.

Your conditions

Sunrise and sunset depend on date and your home location.

Indoors

Outdoors

Sky conditions affect solar heating on the building and rain-driven humidity.

Ventilation

Affects the temperature outlook -- not whether outdoor air looks favorable overall.

Turn off heating or cooling before opening windows -- running HVAC while ventilating wastes energy and fights the outdoor air.

Recommendation

Enter your indoor and outdoor readings, then evaluate to see a detailed recommendation.