Fire Hazard Alert - is your Dryer ready to Ignite

Written by Donald Grummett

In recent years there has been many stories about dryers catching on fire. Should we be concerned? Yes of course. We should take seriously anything that may put our family at risk. Wasrepparttar problemrepparttar 100423 dryer? Rarely. After investigating it is usually determined to have beenrepparttar 100424 venting withinrepparttar 100425 home catching on fire, and notrepparttar 100426 dryer. Obviously appliance manufacturers are concerned aboutrepparttar 100427 possibility of any dryer related fires. They have made it a policy to advise both service companies and consumers that repparttar 100428 use of plastic venting is prohibited. They have also begun issuing cautions not to exceed suggested maximums for venting length. Let me try to explainrepparttar 100429 details of this problem.

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

When clothes are being dried inside your family dryer there are two processes happening. Firstly, heat is applied torepparttar 100430 air insiderepparttar 100431 dryer drum as it turns. This raises its internal temperature to approximately 175 Fahrenheit causing moisture to be driven out ofrepparttar 100432 clothes by evaporation. Secondly, large amounts of air is passed throughrepparttar 100433 clothes. Surprisingly,repparttar 100434 real trick to efficiently dry clothes is notrepparttar 100435 heat, but rather this vast volume of air. Ever wonder whyrepparttar 100436 clothes onrepparttar 100437 clothesline dry so fast on a windy day? The hero isrepparttar 100438 wind. Well,repparttar 100439 same process takes place inside your family dryer. To make them dry faster air is constantly blown throughrepparttar 100440 clothes duringrepparttar 100441 drying cycle. The tumbling action ofrepparttar 100442 drum further exposesrepparttar 100443 clothing torepparttar 100444 hot air flow. While they tumblerepparttar 100445 air picks up moisture fromrepparttar 100446 clothes, carries it downrepparttar 100447 venting, and dumps it outsiderepparttar 100448 home. Most people thinkrepparttar 100449 venting is to pushrepparttar 100450 lint outside. Actually, its primary purpose is to dumprepparttar 100451 moisture outsiderepparttar 100452 home. It is a process that works efficiently. That is, as long as nothing is allowed to interfere with it. Impede, slow down, or stoprepparttar 100453 airflow andrepparttar 100454 process quickly fails. Inrepparttar 100455 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 connectrepparttar 100456 dryer and venting to repparttar 100457 wall outlet. Although time consuming to install, straight venting sections were durable and would often outliverepparttar 100458 dryer. This was inrepparttar 100459 era when laundry equipment always sat inrepparttar 100460 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 workrepparttar 100461 household dryer was moved to accommodate our faster paced lifestyle. To save us time it was moved fromrepparttar 100462 basement to a ground floor laundry room. Although moved to repparttar 100463 working level ofrepparttar 100464 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 furtherrepparttar 100465 dryer was moved again. The laundry room is now often located nearrepparttar 100466 centre ofrepparttar 100467 home, close torepparttar 100468 family room or kitchen. If located upstairs it is often centrally located betweenrepparttar 100469 bedrooms, allowing faster access to where most dirty laundry is produced. Easier forrepparttar 100470 homeowner that is, but no longer near an outside wall. The distance fromrepparttar 100471 dryer to an outside wall ofrepparttar 100472 home is now substantially farther than it used to be. Presto, we have come torepparttar 100473 crux of our problem. The venting is too darned long. Physics andrepparttar 100474 venting pipe --------------

It is a lot more difficult to push air down a long venting pipe than a short one. This is because air insiderepparttar 100475 pipe has weight and volume. Obviously,repparttar 100476 air inside a longer pipe would weigh more than a shorter one. After about twenty feet of venting piperepparttar 100477 dryer begins having difficulty pushing against all this weight. The average dryer motor does not have enough strength to overcomerepparttar 100478 weight ofrepparttar 100479 air insiderepparttar 100480 pipe. The result is thatrepparttar 100481 air inrepparttar 100482 pipe begins to slow down. Sincerepparttar 100483 air slows downrepparttar 100484 moisture accumulates inrepparttar 100485 venting rather than being carried outside. This causesrepparttar 100486 venting interior to become wet and lint traveling through repparttar 100487 pipe will cling to this wetness. This starts a vicious cycle withinrepparttar 100488 venting pipe. It goes something like this: The more lint inrepparttar 100489 venting,repparttar 100490 more blockage; More blockage means slower air flow; Slower air flow means more moisture inrepparttar 100491 venting; More moisture in repparttar 100492 venting means more lint. I think you understandrepparttar 100493 scenario now. Taken to extremesrepparttar 100494 lint can blockrepparttar 100495 venting closed. When this happens it can causerepparttar 100496 dryer to overheat. The normal drum temperature of 175 Fahrenheit can quickly shoot up to 300 Fahrenheit or higher. It may even get hot enough to allow lint inrepparttar 100497 venting to ignite. If a fire of this type starts within flexible plastic venting it can quickly burn throughrepparttar 100498 venting and allowrepparttar 100499 fire to spread. Therefore, remove any flexible plastic venting and replace with rigid, straight sections. Ifrepparttar 100500 total length is less than fifteen feet, flexible “metal venting” is acceptable. Calculating true venting length -----------

Information and facts about granite

Written by Joey Lewitin

Granite – Might of Stone

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 beneathrepparttar surface ofrepparttar 100422 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 ofrepparttar 100423 earths crust, and is generally revealed torepparttar 100424 surface when continental shifts cause breaks inrepparttar 100425 landscape that allow it to be seen.

CONTROVERSIES ON FORMATION Some evidence supportsrepparttar 100426 theory that there is a second way to produce Granite. Lack of evidence for contact betweenrepparttar 100427 granite and surrounding stone, as well as evidence of sediments may demonstrate that granite can also form through metamorphic processes, by combining several minerals under pressure.

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