Ventilation – Introduction

Inspecting buildings over the past ten to fifteen years, we have noticed more and more character damage resulting from moisture exposure. This is possibly because construction practices, over the same period, have developed tighter buildings, chiefly in an effort to conserve energy. These observations have strengthened our belief that ventilation is one of the homeowner’s best friends when it comes to limiting character damage due to moisture, mold, and already termites.

By definition, ventilation is changing or replacing air in a space. For our purposes, we will consider ventilation as air movement, because if air moves, it must be replaced, unless the air movement creates a vacuum. Ventilation can be used to remove odors or excessive moisture, to introduce outside air, to circulate interior building air, and to prevent stagnation of interior building air.

According to Wikipedia, ventilation includes the exchange of air to the outside, in addition as circulation, air movement, of air within the building. Ventilation is one of the most important factors in maintaining permissible building indoor air quality. Ventilation can be categorized into two types, natural and mechanical. Natural ventilation, as the name implies, is ventilation produced by conditions occurring naturally, and which we have little or no control over, like atmospheric pressure, wind currents, gravity, etc. Mechanical ventilation, however, is something mechanically produced, that we can, at the minimum to some extent, control, and typically is produced with some kind of fan.

Air movement quickly dries wet material. To demonstrate, soak three towels in water. Hang one in nevertheless air, hang one in front of an operating fan, and place the third in a closed container. Barring some extremely abnormal event, the towel in front of the fan will dry first. The one in nevertheless air will dry next. The third, inside the closed container, will probably begin to sour, and then deteriorate, but not dry, because the air within the container has become saturated, and can not absorb any more moisture from the towel. consequently, moisture remains in the towel. Combining the wet towel, oxygen, and popular temperature within the container, a decay promoting ecosystem exists.

It is on the assumption, that air movement/substitute contributes moisture removal, and thereby protects your most valuable investment from moisture caused damage, that we will focus. now and then, we will present case studies, relative to the topic being discussed, of conditions truly encountered in our investigations. We invite your comments and questions.

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