There are patented methods for ventilating your attic based on knowledge gained from scientific principles. In fact, it is taught in science classes that cool air goes downward while warm air moves upward. You can use this basic principle in designing and ventilating your attic. A cursory look into your attic and its structural design will let you understand whether the air dynamics in your attic are working for proper ventilation or not. Studying your attic design could reveal a lot about why your attic is like a furnace in the summer and freezing cold in the winter.
First, try to see if the soffit vents, which are responsible for drawing in cool air from the underside of the roof, are working properly and capable of drawing in air to ventilate the attic floor. You can calculate the length requirement for your soffit vents by using the equation [(L x W of attic in feet) / 150 = tot sq. ft. vent area]. This equation will show you exactly how many soffit vents to install and how much area they should take. You should likewise ensure proper spacing of soffit vents around the undersides of the roof. Furthermore, you should always make sure that the soffit vents are not clogged to maximize the drawing in of cool air.
Having installed the necessary soffit vents in the underside of your roof, you may now turn your attention to the rooftop where the exhaust fans, static vents, ridge vents, wind turbines, or power fans are strategically located to draw out warm air from the attic. The idea behind putting these exhausts on top of the roof is based on the principle that warm air moves upward, and as it moves upward, it eases itself out of the exhausts, and thus the natural air dynamics in your attic are maintained. It is necessary to keep the exhausts properly working, otherwise the air dynamics will be disrupted and ventilation will not be maximized.
The proper ventilation of your attic has a domino effect on the ventilation of your whole house. It is essential that you maintain the air dynamics in your attic to minimize your energy expenses.