you are trying to cool your house. The temp in the house is 85. Your ac is set for 78. The outside temp is 71. Which will cool the house the fastest leaving the windows open or leaving the windows closed?

With the AC running, it will be better to open the windows, to get the benefir of additional cooling.

The relative cooling capability of AC and open windows will depend upon the "size" (btu rating) of the AC and the number of windows, and whether there are fans or a wind to draw in outside air.

how old is tomas jefferson?

i think leaving the windows open...cause theres way difference between 78 and 71!! and when you open the door...the coolest temp or wind will come and cool your house..!!
and if you put on AC and open the window,,the breeze of AC wont work!!and it wont cool your house!!

Keeping the windows closed will be more effective in cooling the house when the AC is running.

When the AC is set to 78 degrees and the temperature inside the house is 85 degrees, the AC will work to cool the air inside the house. By keeping the windows closed, you prevent warm air from entering the house and help maintain a lower temperature.

On the other hand, if you open the windows while the AC is running, you are allowing warm outside air to enter the house, which will make it harder for the AC to cool the space. This can result in slower cooling and potentially higher energy consumption.

However, if the outside temperature is significantly lower than the desired temperature inside, such as in the case where the outside temperature is 71 degrees, leaving the windows open can provide natural cooling without relying solely on the AC. Opening windows would allow cool air from outside to circulate through the house and help lower the temperature.

It's important to note that the effectiveness of leaving the windows open will also depend on other factors like the size of the house, number of windows, presence of fans, and the direction and strength of any breeze.

In conclusion, if the outside temperature is significantly cooler than the inside temperature, leaving the windows open can help cool the house. However, for optimal cooling when the AC is running, it is generally better to keep the windows closed to prevent warm air from entering the house.