To Vent or Not To Vent? To the Editor: The article "Crawlspace Ventilation Update," by Don Best (8/99), is one of the most important articles that you have published in recent years. If you had included information on the mechanics of relative humidity, to explain that the capacity of air to hold water vapor increases and decreases when temperature increases and decreases, this would have provided a complete factual authoritative source of information for presentation to code officials. Howard Brickman Brickman Consulting Norwell, Mass. A Skeptic To the Editor: As building inspector for James City County in the Williamsburg, Va., area, I have encountered hundreds of singlefamily homes with premature decay of wooden joists and girders created by excessive moisture in the crawlspace. Based on my