Nocturnal Cooling cuts down on your Air Conditioner or Evaporative Cooling Load 

Take advantage of night's cool air, NOCTURNAL Cooling to keep your home more comfortable during the hot day.

It is a standard misconception that during the summer we need to ventilate, ventilate, ventilate. Most people leave their windows open from June through September, shutting them only in hard, driving rain or when the air conditioning is on. If you lived in a light, shaded, wood-framed home, 24-hour venting might work to beat the summer heat. For heavier structures, however, nocturnal cooling can be far more effective. All that is required for nocturnal cooling is to open a few windows and doors in the evening and allow the natural convective air currents to bath the walls of the buildings, both inside and out, with cool, dry nighttime air. In the morning, when the house is cool, close up all these doors and windows. Seal up the building as tight as you would in the winter. In fact, windows should be left with the storm windows installed - they keep out heat as well as cold - and curtains or shades should be drawn to keep out the sun. After a couple of days of this procedure, you will find that you have begun to develop a cycle of heat flow in the structure, making use of the thermal lag of heavy masonry and home furnishings. You will find that the building is cool and dry, no matter how hot and muggy it is outdoors. 

During Hot summer days, when you shouldn't open your windows, most furnace fans can circulate cool air from lower levels to upper levels and keep your home more comfortable during the day. Remember, only ventilate when outside air is cooler than inside air, or you'll be heating up your home! 

Nocturnal Cooling cuts down on your Air Conditioner or Evaporative Cooling Load 

Shading from trees and cool grass can help keep your house cooler in summer.

Green ways of Cooling. 
The sun's radiation is clearly the greatest liability for summer cooling for both building energy use and comfort. In addition to solar screens, window quilts and awnings, trees and the shade they provide are a great way to keep radiant solar heating from making your house too hot in the summer. Cool grasses and smaller, light-colored driveways keep the air around your house cooler. Shade-providing trees can also help keep your attic from heating up by reducing the amount of direct sunlight hitting it.