The drying process ---------------------------

When clothes are being dried inside your family dryer there are two processes happening. Firstly, heat is applied to air inside dryer drum as it turns. This raises its internal temperature to approximately 175 Fahrenheit causing moisture to be driven out of clothes by evaporation. Secondly, large amounts of air is passed through clothes. Surprisingly, real trick to efficiently dry clothes is not heat, but rather this vast volume of air. Ever wonder why clothes on clothesline dry so fast on a windy day? The hero is wind. Well, same process takes place inside your family dryer. To make them dry faster air is constantly blown through clothes during drying cycle. The tumbling action of drum further exposes clothing to hot air flow. While they tumble air picks up moisture from clothes, carries it down venting, and dumps it outside home. Most people think venting is to push lint outside. Actually, its primary purpose is to dump moisture outside home. It is a process that works efficiently. That is, as long as nothing is allowed to interfere with it. Impede, slow down, or stop airflow and process quickly fails. In past homeowners who wanted to vent their dryers did it using rigid sections of venting. The sections were secured together (using screws or duct tape), and elbows were added if necessary, to connect dryer and venting to wall outlet. Although time consuming to install, straight venting sections were durable and would often outlive dryer. This was in era when laundry equipment always sat in basement, against an outside wall. Then along came flexible plastic venting. It made installations easier. It turned an hour installation into a ten minute job. The flex though tended to become brittle and break easily. Also it was prone to blockage and needed to be replaced every few years. But since plastic venting was more convenient we continued with its use. Then came a change in lifestyle. As both parents went off to work household dryer was moved to accommodate our faster paced lifestyle. To save us time it was moved from basement to a ground floor laundry room. Although moved to working level of home, it was still close to an outside wall. So you are saying, “I know all this, but what does it have to do with venting fires”. I answer, “Have patience, we are almost there”.

Taking this desire for easy access still further dryer was moved again. The laundry room is now often located near centre of home, close to family room or kitchen. If located upstairs it is often centrally located between bedrooms, allowing faster access to where most dirty laundry is produced. Easier for homeowner that is, but no longer near an outside wall. The distance from dryer to an outside wall of home is now substantially farther than it used to be. Presto, we have come to crux of our problem. The venting is too darned long. Physics and venting pipe --------------

FORMATION Granite is generally produced by magma solidifying under extreme pressure. When magma rises, due to being lighter then surrounding rocks, it begins to cool. This cooling happens slowly, and crystals are formed beneath surface of earth. This produces a tightly interlocked structure, which is why granite is such a strong stone. It is comprised mostly of quartz, alkali feldspar, and plagioclase feldspar. Granite makes up a lot of earths crust, and is generally revealed to surface when continental shifts cause breaks in landscape that allow it to be seen.