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Good indoor air quality is a critical element that contributes to a favorable learning atmosphere and helps ensure that all students and staff are working in a healthy environment.

With continuing escalation in fuel and energy costs, school systems recognize the importance of optimizing the insulation of school buildings and sealing the building to prevent loss of heating and cooling. When buildings have been effectively sealed, the heating and ventilation system is a key element in regulating a safe internal environment.

According to the American Lung Association, poor indoor air quality can trigger asthma episodes and a myriad of other health related problems. Poor air quality is becoming increasingly costly for schools due to expensive mechanical and environmental consulting fees, rising energy cost, building and mechanical equipment failure and repair and increased liability cost. For these reasons, proper maintenance of HVAC equipment that supports a high quality indoor air environment is more than just a budget issue it's a health and safety issue.

With schools faced with increasingly tight budgets and the need to optimize returns on facility and IAQ improvements, use of technologies that help to optimize HVAC efficiencies while reducing maintenance cost is a "common sense" approach that can help everyone breathe a little easier.

Air Intake Filtration Technology

When air handling units draw fresh air into buildings, the air typically travels through banks of internal pleated filters which capture small airborne particulates before they can get inside the building. However, when large debris such as cottonwood seed, dandelion seed, leaves, insects, paper, construction debris and other matter get into the fresh air openings, the internal filters can become prematurely fouled by the "blanketing effect" of large debris, rendering the internal filters significantly less effective at capturing the small particulate they were designed to stop. To solve this problem, use of Air Intake Filtration Technology is an effective way to isolate large debris on the outside of the equipment where it can be easily removed. By stopping larger debris on the outside of the air handling unit, it can increase the life of internal filters by up to 60% and that means a savings in filter cost and an improvement in indoor air quality.

When used on air cooled chillers and condenser units, air intake filtration helps to optimize the efficiency of your equipment by preventing airborne debris from getting into the coils. Keeping condenser coils clean, means that your cooling systems will run less frequently and for shorter periods of time while providing your building with the cooling output needed to effectively manage indoor temperatures. When coils get dirty and clogged, your cooling equipment looses cooling capacity and consumes more energy because it must work harder and run longer to reach set temperature points. Deferring coil maintenance can lead to compressor failure and complete loss of cooling.

Schools using cooling towers for environmental cooling must recognize that keeping debris out of the cooling tower is critical to safety and system efficiency. When you think of cooling towers, it is important to realize that they are very large and efficient "air scrubbers" - all airborne matter that happens to float past the draft of the tower gets drawn into the cooling water and can compromise the entire system by plugging strainers and heat exchangers, reducing water flow and thwarting the heat exchange process; furthermore, when debris gets into the fill material, it can reduce the cooling towers' ability to cool the water to the designed temperature point before being re-circulated through the cooling loop. When cooling water exceeds the designed temperature point when introduced into the chiller unit - it increases the load on the chiller, reduces the heat exchange capacity and can lead to chiller failure.

Another problem that can result from debris getting into your cooling tower is a reduction in the effectiveness of you water treatment chemicals. The reason for a reduction in effectiveness is in large part due to what is known as "chemical absorption" - this is where debris absorbs water treatment chemicals, locking them inside the debris and making them unavailable to the surrounding water; this has a direct impact on chemical efficiency. To compensate for absorption, more chemicals are needed. Furthermore, when debris gets into the water and decomposes, it can create an environment conducive to bacteria growth (including Legionella). If the system isn't properly maintained, Legionella and other bacterial can proliferate and come into contact with maintenance workers and others that may get near the tower. Additionally, bacteria can get into the building air intake openings when contaminated water from a poorly maintained cooling tower is picked-up by the wind and is drawn into fresh air intake openings, thus exposing building occupants and posing a serious health risk.

By using air intake filters, with a well-managed water treatment regimen, your cooling tower will be clean and healthy and operate efficiently.

Air Intake Filter Technology Features:

• Simple to install - installs on outside of equipment (condenser coils, air handling units, cooling tower and louvers).
• Patented engineered filter provides a fine balance between airflow and filtration performance with low static pressure impact.
• Mold & mildew resistant, UV resistant and flame resistant.
• Multiple fastening and operating methods to suite any application.
• Filters are easy to clean using a broom, brush or shop vacuum. Removal not required for cleaning.
• Will deliver up to 15 yrs of service.

Benefits of Air Intake Filtration On:

Air Handling Units:

• Prevents premature fouling of internal pleated or bag filters.
• Optimizes the efficiency of internal filters.
• Protects louver actuators.
• Helps improve indoor air quality.

Air Cooled Chillers & Condenser Coils

• Prevents debris from getting into the coils.
• Reduces / eliminates the need for power washing and hazardous cleaning chemicals. which can damage coils.
• Reduces cleaning effort by up to 75%.
• Helps reduce energy cost because equipment runs clean and efficiently.
• Helps optimize indoor cooling comfort.

Cooling Towers

• Isolates debris on the outside of the cooling tower where it is easy to clean.
• Helps prevent sludge build-up.
• Prevents fouling of fill, strainers and heat exchangers.
• Diffuses sunlight, reducing algae growth.
• Reduces water treatment chemical consumption by up to 50%.
• Reduces scheduled cleaning work effort by up to 50%.
• System runs efficiently all season long.

School facility managers and maintenance engineers seeking ways to streamline HVAC maintenance practices while improving indoor air quality will be well served by integrating air intake filtration technology into their preventative maintenance program.

Air Solution Company developed and patented the first Air Intake Filter specifically engineered to mount to the outside of cooling towers and other HVAC equipment for purposes of stopping the debris before it entered into the system. Since that time, Air Solution Company has been manufacturing and has introduced a variety of other innovative filter systems including its new Fine Mesh Filter which is engineered for use on small and medium size refrigeration coils and machine fan intake housing units.

Air Solution Company Randy Simmons is with Air Solution Company, author of articles can be reached at http://www.airsolutioncompany.com

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When setting up a home office with a new computer, fax machine or perhaps even a copier, be sure to pick the right telephone. Your phone will be an important link to the outside world and chances are youll be spending a lot of time on it.

If youve ever tried to work with a computer or other office equipment while talking on the phone, you know how frustrating it can be. A hands free telephone is one item that you cannot afford to be without. Fortunately, there are many hands free phones to choose from.

A good choice might be the plantronics CT12 cordless headset telephone. The CT12 2.4 ghz DSS model is about the size of a cell phone and comes equipped with a 2-way headset. This design allows you to make and receive calls hands free while working and moving around. The handset maintains a wireless connection to the base, which plugs into a land line jack.

The CT12s hand set is well laid out and solid. Its small measurements (3 1/4 x 2 x 1) make it perfectly pocket sized. The display is a three line, backlit lcd. The CT12s keypad is easy to use but the tiny buttons seem a bit awkward at first. The only problem is the belt clip: it allows the phone to fall off. Its best to carry it in a pocket.

The lightweight headset can be worn over the ear or over the head. Either position is comfortable but I prefer over the head. It just feels much more secure. The CT12 has a feature that the manufacturer calls Firefly. This is a small red light at the end of the headset that blinks to let others know when youre talking on the phone.

The sound quality, both incoming and outgoing, is really quite good. The microphones noise canceling technology helps to suppress background noise, such as air conditioners. The CT12s range is 100 FT. from the base. You can walk around your house, into another room or even outside with no loss of reception. The lithium ion battery provides 5 to 6 hours of talk time or 14 days on standby.

The CT12 comes with all of the standard features: speed dialing, a phone book that has enough room for 100 numbers, call waiting, caller ID and chain dialing. Chain dialing allows you to store numbers that are used once your call connects, such as extension or account numbers. There is no speaker phone however, as the CT12 was designed for hands free use.

The CT12s only drawback is the occasional interference with wireless computer networks. This problem can be overcome by pressing the channel selector button. Alternatively, you can change the channel on your wireless router.

The overall quality of the CT12 is very good. This is a phone that can take a lot of abuse. All things considered, Id say its a good buy.

Robert Lee Howard is a web developer and online marketer. For more information see http://www.plantronicsct12.com

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Nothing can be more annoying than black lines, faded regions or faded text when printing a document you have worked long and hard on. Doing a printer cleaning is the best way to always have a clean and readable document.

two type of printers

Whether the printer is an epson printer, HP printer, or a Canon printer the general procedure for cleaning is the same. If the printer happens to be a bigger printer, for items such as advertising on larger format materials, the process is a bit more exaggerated but essentially the same.

Every day printers

Cleaning an every day office type printer usually just entails a good solid wipe down. The real trick is to not damage the printer by using cleaning items that are meant for other cleaning activities. Cleaning chemicals to avoid include alcohol or more harsh cleaning agents. These chemicals can damage electrical areas and do more harm than good. Try and stay with light cleaning supplies like baby wipes or a damp non shedding towel. In either case, do not let water get into contact with the inside of the printer whether it is an epson printer, canon printer or any other.

Cleaning the printer

The very first thing to do is unplug the printer. Make sure that all lights are out and that the plug is away from the unit.

open the front of the printer, with a damp non-shedding cloth give a light wipe down looking for dust build up or paper shards. If the paper has been appearing with black marks on the back, look inside the printer and wipe excess ink away. Make sure to wipe this area again so that there is no remaining moisture.

A clean printer cartridge is also a must clean area. remove each cartridge and gently wipe excess ink away. Be sure not to leave any fibrous material around exit ports. The paper receiver basket may need to be removed and check underneath for dust and paper shards around the legs. A proper printer cleaning also means wiping down the basket with a mild detergent. You can also use a cleaning cartridge, which helps to clean inaccessible points of printer by hand.

If the printer has not been used for some time a head cleaning will be needed. For a complete printer cleaning in this instance go to the control panel and printers. Here the unit will be able to run diagnostic programs and get the printer heads up.

Larger specialized printers

With larger printers designed for more specialized uses, including large format blue prints or advertising mock-ups printer cleaning requires a differing approach. An approved vacuum system is the most important tool to have on-site. This vacuum should be static free, so as not to damage interior components through static shock, and have a separate motor unit to be kept away from the printer unit.

Cleaning the printer is particularly needed in the winter and spring. In the winter the air is dry and dust is attracted. Be careful so as not to set off a static charge. In spring pollen can get anywhere no matter how you try. A printer cleaning makes all involved happier and healthier with less dust and pollen involved.

This article is written by James Kara Murat from PrintCountry.com, the contributor of Inkjet printer and Ink Cartridge Use tips. A longer version of this article is located at How to Clean a Printer, and related resources can be found PrintCountry Ink Removal Tools

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