High Temperature Exhaust Ventilator Fan}

High Temperature Exhaust Ventilator Fan


Oleg TchetchelThe main purpose of the NFPA can be summarized into three main categories. First, NFPA promotes the science and improves the methods of fire protection and prevention, electrical safety, and other related safety goals. Secondly, it obtains and circulates information on these subjects. And thirdly, it secures the cooperation of its members and the public in establishing proper safeguards against loss of life and property. The fourth organization is Underwriters Laboratories, Inc.. UL is a non-profit, independent organization that maintains and operates laboratories for examination and testing of devices, systems and materials to determine their relation to life, casualty hazards and crime prevention. UL has three safety standards that apply to emergency smoke exhaust products. UL705 is concerned with the mechanical and electrical construction to insure safe operation. All electrical components (motor, wiring, switches, enclosures, etc.) must be ULlisted. UL793 is concerned with the lifting mechanism for the butterfly dampers and the fusible link. In order for a product to be listed in the UL Directory under ‘Power Ventilators for Smoke Control Systems, it must meet the requirements of both UL705 and UL793. Additionally, UL must witness a full-scale test of a fan operating for the required time at the specified elevated and temperature.High temperature exhaust fans can be grouped into two general categories: emergency smoke evacuation and process ventilation. Generally speaking, emergency smoke evacuation fans may never be used, but they must be installed and be capable of exhausting high temperature air and smoke in the event of a fire. In contrast, high temperature process ventilation requires continuous duty exhaust of high temperature air, fumes or particulate. Both application types are uniquely different requiring special construction and system design considerations. In this article, we will examine both types of exhaust applications, looking first at the emergency smoke exhaust category. Since emergency smoke exhaust deals with lifesafety issues, there are governing bodies in place that identify and regulate specific design and performance standards. The administration and organization of the various governing bodies is subject to modification based on the needs of the industry. Currently, four such agencies are Industrial Risk Insurers (IRI), Southern Building Code Congress International, Inc (SBCCI), the National Fire Protection Association (NFPA), and Underwriters Laboratories, Inc. (UL). IRI insures properties all over the world based on an informational manual, which details the construction requirements that belt drive emergency heat and smoke exhausters must meet in order to be covered by IRI.So what makes one fan more capable of sustaining higher temperatures than another fan? Each model has a recommended maximum operating temperature based on the construction materials, drive components, and airflow characteristics. The limiting temperature is determined to be the highest temperature that any component of the fan assembly will reach during any operating cycle. Similarly, the maximum operating temperature is typically determined to be the lowest temperature that begins to exceed the capacity of any one component. For example, in some cases the bearings may be the limiting component, while in other cases the fans impeller construction material may be the limiting component. The construction material is perhaps the most obvious element of the fan to consider when dealing with a high-temperature application. In general, aluminum withstands maximum temperatures up to 250 F, standard carbon steel up to 750 F, and 316 stainless steel up to 1000 F. Critical components are many times constructed of ferrous materials to withstand the higher temperatures. If temperatures were to exceed 300 F, for example, aluminum would be eliminated as a construction material option. Other construction considerations include bearing type, drive component selections, means of ventilation and cooling of the drive components, and insulation options.The most common way of simplifying construction and component specifications to accommodate high temperature applications is to maintain separate categories based on the specified temperature range and time requirements.Tenderall Fan has four Heat Option Packages for high temperature operation. Heat Option I construction is designed for continuous operation between 200 F and 500 F. Heat Option II construction meets specifications requiring the fan to exhaust 500 F air for a minimum of four hours in an emergency smoke removal situation per IRI requirements. Heat Option III construction meets the specifications requiring the fan to exhaust 1000 F air for a minimum of 15 minutes in an emergency smoke removal situation per SBCCI. This construction also surpasses the IRI requirements for 500 F for a minimum of four hours. Heat Option IV construction meets specifications for UL Listed ‘Power Ventilators for Smoke Control Systems. This includes the IRI requirement of 500 F for a minimum of four hours, the SBCCI requirements of 1000 F for a minimum of 15 minutes, and the Snow Load Test for butterfly dampers in UL-793.While it may be tempting to choose a higher heat option than necessary “just to be safe”, doing so can add considerable and unnecessary cost to the job. For example, selecting HT Option III when HT Option II is adequate adds insulation and high temperature bearings. These items would be considered “overkill” and add unnecessary extra costs.Additional information can be found at the Tenderall Fan web site http://www.tenderall.comOleg TchetchelIndustrial Equipment Designernisco@globalserve.netTenderall Fan Co.http://www.tenderall.com/blower/index.htmlhttp://www.tenderall.com/ventilator/index.html

Oleg Tchetchel

Industrial Equipment Designernisco@globalserve.netTenderall Fan Co.http://tenderall.com/blower/index.htmlhttp://tenderall.com/ventilator/index.html

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How To Build A Good Article Marketing Campaign

How to Build a Good Article Marketing Campaign by Clare SwindlehurstIf you want to be a successful internet marketer then you need to build your credibility with your chosen niche and drive targeted traffic to your website. The cheapest and easiest way to achieve both of these things is with article marketing. But you can’t just write one article and expect to receive a flood of visitors, you need to build a whole campaign. Here are four steps you should take to build a good article marketing campaign.Step one: Research your marketThe first step in creating a successful campaign is to find topics to write articles about, and this means that you need to research your market.Visit your search engine of choice and type forum + your niche into the search box. You might be looking for articles on weddings, or fishing or even adoption, just swap the words ‘your niche’ for the name of your niche.You should be presented with a long list of forums where people in your target niche are talking about their experiences and their problems. Spend some time exploring the forums you find and see what topics people are discussing. What problems do they have? What advice and guidance are they looking for?Grab a pen and a piece of paper and write down as many questions and topics as you can; these will make the basic foundation of your articles.Step two: Article writing and submissionNow you know what topics your audience are interested in you can start writing your articles. Scan the list for a problem that you know the solution to and write about it. Add as much value as you can for the reader by being clear about what they need to do to solve their problems and add some examples where you can.At the end of each and every article you need to include a bio or resource box that tells the reader a little bit about you, but more importantly what else you can do to help them. You should also include at least one link to your website, you are trying to drive traffic there after all.Once you have the words down on paper spend some time editing the article to make sure that it sounds professional and that you don’t have any spelling mistakes or grammatical errors.You can now go ahead and submit your article to an article directory; Article directories are a great place to start.Now you can write another nine articles answering more of the questions you discovered in the forums and submit these too. Try and use at least three different bio box variations.Step three: Analyse resultsAfter a week to ten days your articles should have had enough views for you to start analysing your results. Login to your author dashboard and find the click through rate information for your articles. Are there some articles with a greater click through rate than the others? This could be because the bio box was more effective at encouraging visitors to visit your website, or it might be that the content of the article was more compelling.Also take a look at the number of views each article has, a higher number of views might indicate that the title was more appealing.Step four: Rinse and repeatIt’s now time to write another batch of articles. Hopefully you still have some unanswered questions on your list, but if not go back to the forums and find some more.Use the information you gleaned from step three to tweak your bio box and to create more powerful and engaging titles. As you publish more and more articles you will start to learn what style of article, title and bio box works best for your audience.Set aside some time each and every week to write another batch of articles and review your results. You might even want to become a member of the forums you found and point people to your articles to help them solve their problems.A consistent article marketing campaign can help you to drive targeted visitors to your website and increase your income. Taking time to research your market will help you find topics that appeal to your audience and a well-written knowledgeable article will increase your credibility. Analysing your results will help you perfect your article writing strategy and submitting articles regularly will keep that traffic flowing.Article Marketing is a brilliant low-cost way to drive targeted traffic to your website. But did you know there are at least six other ways that you can re-use that article to encourage even more people to visit your site? You’ll find all the answers you need at ultimatetrafficmaster.com.Article Source: eArticlesOnline.com

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Word Press Website Using Php Web Development Services

Submitted by: Asha Infotech

WordPress have become the most talked about open source Content Management System (CMS) and a dynamic web content publishing platform. The CMS software helps in creating and managing HTML content through document control, auditing, editing, and time line management. A number of creative graphic design services who are also into PHP web development services are offering their clients WordPress website due to its immense popularity. WordPress website has a number of advantages and is quite simple to use, for which it has become a popular choice among web developers. Asha Infotech, a leading web development company provides customized WordPress site at an affordable price point.


Installation time span of WordPress website is not more than 5 minutes. The professional developers of PHP web development services can create WordPress themes and can even customize them to enrich the CMS driven website. The simple, flexible, and powerful element of WordPress has earned users favor.


WordPress is also used for blogging and helping in managing posts, comments and files. The GUI (Graphical User Interface) provides simple and efficient options without complicated administration interface. The users can personalize domain name instead of sub-domain name. So it offers the self hosted blog facility and one do not need to appoint a creative graphic design service for designing purpose, until the blog is used for official purpose. The inbuilt dashboard allows users to post comments and explore category, themes and other settings and tools easily.

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Themes in the WordPress website can be downloaded according to ones wish without any major restriction. With the use of multiple plug-in – the pulse of WordPress, it has become easier to integrate and customize content system. At the same time, you can even buy some of the themes available. The content can be edited without having any need of knowledge for code.

WordPress websites are very SEO friendly. The self ping feature sends information to different search engines whenever your website is updated. It offers a high level of creativity as the developer can play with CSS files to customize the designs based on his need by even using PHP web development services. Being light weight software, it does not create obstacle for your page loading speed.

Asha Infotech offers unique WordPress development services that include:

WordPress site planning and architecture

Designing and Implementing

Migrating HTML website or a Legacy CMS to WordPress

Optimizing a WordPress site for Search Engines

The best feature of WordPress CMS is that it can easily be used and implemented by anyone who has basic knowledge of computers. For additional functionalities of coding and techniques, you need to appoint professional web developers and creative graphic design service providers.

It is a necessity to upgrade your WordPress website in order to secure it from hacking possibilities as it is open source software. Install the brand new plugin of WordPress removing the older one and ensuring a better compatibility.

If you are looking for a superior quality WordPress website, our experienced WordPress developers at Asha Infotech can develop complete custom solutions.

For more information on PHP web development services, log on to www.ashainfotech.com.

About the Author: If you are looking for a superior quality WordPress website, our experienced WordPress developers at Asha Infotech can develop complete custom solutions.For more information on PHP web development services, log on to





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