Posts Tagged ‘Cool Air’

The Cost-Effectiveness of Solar Ceiling Fans

Solar Attic Fan 20-watt with 25-year warranty

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Amazon Price: $375.00

  The Cost-Effectiveness of Solar Ceiling Fans  

During summer, the temperatures in your home could reach a very uncomfortable and stifling level. That is why many homeowners incur exorbitant electric costs during summers because their fans or air conditioners work overtime to provide cool air.

By installing solar ceiling fans, you can cool yourself the whole day long without worrying about your electric cost. The fans will help circulate cooler air and lower temperatures in your home. Plus, solar fans are available in interesting designs and styles that will complement any modern, contemporary home. Take a look at some solar ceiling fans that may interest you.

The Cost-Effectiveness of Solar Ceiling Fans

Solar Attic Fan:

This environmentally sensible solution to heat can also help you save money. This sleek, elegant and efficient vent is powered solely by solar energy and is both quiet and compact. It is easy to install because it does not require electrical wiring. You can install it in any area where you want to improve circulation such as lofts, workshops, garages, barns, lofts and even storage sheds. The fan comes with fully removable and adjustable custom solar panel, self-tapping screws, wire lead and adjustable bracket for solar panel. The dimensions are 19.125 inches by 16.125 inches for solar panels and venting capacity of up to 1,800 square feet.

cSol Solar-Powered Ceiling Fan Kit:

This fan can be installed either indoor or outdoor. It features a wall switch with two speed reversible options, multicrystalline technology and strip module. It measures 42 inches and 36 inches, blades available in finish options of black, silver, almond, oak and white and housing in choices of nickel, chrome, brass or white.

The Cost-Effectiveness of Solar Ceiling Fans

Macrovoltaic Solar Fan:

This fan boasts infinite efficiency to provide consumers with great savings and positive effect to the environment. It features variable speed with forward and reverse, invertible blades, 180-watt solar panel, custom blade anodizing, corrosion resistant coating and custom extensions. It comes with backup battery and a 12-year service life warranty.

Solar Industrial Exhaust Fan from Nanjing Jie Yang Da Electric Appliances Co.:

This fan will keep your house cool during the hottest of days and reduce power consumption. It draws out the water vapor away from home to allow the flow of fresh air. It comes with a 12-volt brushless DC motor, metal temperature controller and 20-watt to 25-watt solar panels. The fan has a maximum ventilation capacity of as low as 800CFm and as high as 1500CFM which is ideal for a 100 to 200 square feet area.

The Cost-Effectiveness of Solar Ceiling Fans

Backwoods Solar Electric Systems' Solar Direct Attic Fan:

This noiseless solar fan uses PV module of 11-watt, 15-watt or 20-watt to move up from 850 CFM to 1,250 CFM from your attic. It features molded, ABS plastic base that is paintable, 5 12-inch aluminum blades, stainless steel screen, and thermal switch. The flat base of the fan measures 24 and ? inches by 24 and ? inches with overall height of 7 inches. The available models and their corresponding prices are FAN 850 for $485.00, FAN 1050 for $585 and FAN 1250 for $685.

Solar Dynamics LLC's SDF-20SF Fan:

This self-flashed base fan is designed to be installed on sloping, low profile roof. Waterproofing the roof decking and materials is highly recommended.

The best way to find cheap and quality solar ceiling fans is on the Internet. Many retailers (backwoodsolar.com, solardynamicsinc.com, etc) offer solar fans in various designs and styles and in good quality. But keep in mind not to buy the first fan that caught your attention. Comparison shopping is still the best thing to do for smart buying.

For more information concerning SOLAR CEILING FANS, visit http://www.themodernceilingfans.com.

Industrial Power Roof Ventilators

A reliable ventilation system that can operate during a fire is both vital and essential. It prevents smoke logging, allows people to escape quickly, minimizes damages to property and contents and enables firemen to attack the fire without hindrance. Such power roof ventilators have the added advantage of providing normal day to day ventilation and in many cases can also be fitted with duct work for use in multi storey buildings.

Natural ventilation depends on winds outside and convection currents inside a building. Winds raise air pressure slightly on the windward side of a building and lower it slightly on the lee side. The pressure difference promotes circulation into the building on the windward side and out of it on the lee side. Convection currents are caused by the sinking of colder and therefore heavier air, which displaces the warmer air. A building may have a roof ventilator to allow the rising warm air to escape. If there is an opening to the outside at the bottom of the building, fresh, cool air will be drawn in.

Proper ventilation requires that there be a movement or circulation of the air within the space and that the temperature and humidity be maintained within a range that allows adequate evaporation of perspiration from the skin. It was formerly believed that the discomfort, headache, and lethargy commonly associated with poor ventilation were caused entirely by the increase in the amount of carbon dioxide and the decrease in the oxygen content of the air. There is evidence to show, however, that the deleterious effects result largely from interference with the heat-regulating mechanism of the body. Lack of air currents and the increase in relative humidity and temperature (especially noticeable in crowded, poorly ventilated places) prevent normal evaporation of perspiration and loss of heat from the surface of the skin.

A simple roof ventilator is essentially an opening in the roof with a cover to keep out rain and to prevent winds from interfering with its functioning. Natural convection is an appreciable aid to ventilation in a large building only if it contains sources of large amounts of heat. A further useful adjunct is a fan fan, device for agitating air or gases or moving them from one location to another. Mechanical fans with revolving blades are used for ventilation, in manufacturing, in winnowing grain, to remove dust, cuttings, or other waste, or to provide draft for a fire. The addition of distribution ducts to the fan and a system for forcing air into the building provides greater efficiency. Outlets are designed to attain maximum mixing of air and to move large amounts of air at low velocity so that temperature layers are eliminated. Factories have special suction hoods and enclosures to draw away localized dust, fumes, and heat. Incoming air may be cleaned of dust by filters or electrostatic precipitators.

Deep mines, underwater tunnels, and other subterranean and submarine environments require elaborate mechanically operated systems for maintaining the air supply in a healthful condition. The lives of those working in, or traveling through, such areas depend upon a constant supply of fresh air; not only must the systems used be highly efficient, but there should be provision for emergencies in case of failure of the apparatus in operation. An outgrowth of studies of problems of ventilation is the development of methods of air conditioning heat pump is a reversible device that does mechanical work to extract heat from a cooler place and deliver heat to a warmer place. The heat delivered to the warmer place is, approximately, the sum of the original heat and the work done.

Such systems, unlike ordinary methods of ventilation, are independent of outdoor atmospheric conditions and can, therefore, maintain the indoor atmosphere at the most healthful temperature and humidity and can free the air of dust and other undesirable materials. They accomplish this, however, at a considerable cost in energy.

Roof ventilators are another option.  They work in both summer and winter.  In summer, roof ventilators reduce the build up of heat in the ceiling spaces, reducing the heat load on your insulation, meaning that the insulation works more effectively.  In turn, you will save on your electricity bills as the air-conditioning systems will not have to work as hard.  In winter, it reduces the amount of condensation that forms when warm, moist air from exhaust fans meets cold surfaces.  Roof ventilators will also reduce the amount of corrosion and timber that occurs because of condensation.   Roof ventilators should be installed where there is sarking underneath tiled roofs, when metal deck roofing is used, and when there is evidence of condensation in the roof spaces or ceilings.

Additional information can be found at the Tenderall Fan Co. web http://www.tenderall.com.

Oleg Chetchel
Industrial Equipment Designer
Tenderall Fan Co.
http://www.tenderall.com/inquiry/index.html
http://www.tenderall.com/fanblower/index.html

Roof Ventilators by Canada Blower

Natural ventilation depends on winds outside and convection currents inside a building. Winds raise air pressure slightly on the windward side of a building and lower it slightly on the lee side. The pressure difference promotes circulation into the building on the windward side and out of it on the lee side. Convection currents are caused by the sinking of colder and therefore heavier air, which displaces the warmer air. A building may have a roof ventilator to allow the rising warm air to escape. If there is an opening to the outside at the bottom of the building, fresh, cool air will be drawn in.

Proper ventilation requires that there be a movement or circulation of the air within the space and that the temperature and humidity be maintained within a range that allows adequate evaporation of perspiration from the skin. It was formerly believed that the discomfort, headache, and lethargy commonly associated with poor ventilation were caused entirely by the increase in the amount of carbon dioxide and the decrease in the oxygen content of the air. There is evidence to show, however, that the deleterious effects result largely from interference with the heat-regulating mechanism of the body. Lack of air currents and the increase in relative humidity and temperature (especially noticeable in crowded, poorly ventilated places) prevent normal evaporation of perspiration and loss of heat from the surface of the skin.

A simple roof ventilator is essentially an opening in the roof with a cover to keep out rain and to prevent winds from interfering with its functioning. Natural convection is an appreciable aid to ventilation in a large building only if it contains sources of large amounts of heat. A further useful adjunct is a fan fan, device for agitating air or gases or moving them from one location to another. Mechanical fans with revolving blades are used for ventilation, in manufacturing, in winnowing grain, to remove dust, cuttings, or other waste, or to provide draft for a fire. The addition of distribution ducts to the fan and a system for forcing air into the building provides greater efficiency. Outlets are designed to attain maximum mixing of air and to move large amounts of air at low velocity so that temperature layers are eliminated. Factories have special suction hoods and enclosures to draw away localized dust, fumes, and heat. Incoming air may be cleaned of dust by filters or electrostatic precipitators.

Deep mines, underwater tunnels, and other subterranean and submarine environments require elaborate mechanically operated systems for maintaining the air supply in a healthful condition. The lives of those working in, or traveling through, such areas depend upon a constant supply of fresh air; not only must the systems used be highly efficient, but there should be provision for emergencies in case of failure of the apparatus in operation. An outgrowth of studies of problems of ventilation is the development of methods of air conditioning heat pump is a reversible device that does mechanical work to extract heat from a cooler place and deliver heat to a warmer place. The heat delivered to the warmer place is, approximately, the sum of the original heat and the work done.

Such systems, unlike ordinary methods of ventilation, are independent of outdoor atmospheric conditions and can, therefore, maintain the indoor atmosphere at the most healthful temperature and humidity and can free the air of dust and other undesirable materials. They accomplish this, however, at a considerable cost in energy.

Roof ventilators are another option.  They work in both summer and winter.  In summer, roof ventilators reduce the build up of heat in the ceiling spaces, reducing the heat load on your insulation, meaning that the insulation works more effectively.  In turn, you will save on your electricity bills as the air-conditioning systems will not have to work as hard.  In winter, it reduces the amount of condensation that forms when warm, moist air from exhaust fans meets cold surfaces.  Roof ventilators will also reduce the amount of corrosion and timber that occurs because of condensation.   Roof ventilators should be installed where there is sarking underneath tiled roofs, when metal deck roofing is used, and when there is evidence of condensation in the roof spaces or ceilings.

A reliable ventilation system that can operate during a fire is both vital and essential. It prevents smoke logging, allows people to escape quickly, minimizes damages to property and contents and enables firemen to attack the fire without hindrance. Such power roof ventilators have the added advantage of providing normal day to day ventilation and in many cases can also be fitted with duct work for use in multi storey buildings.

Additional information can be found at the Canada Blower company web site http://www.canadablower.com/fans/index.html.

Susan Terlitski
Canadian Ventilating Engineer
Canada Blower
http://www.canadablower.com/blowers/index.html
http://www.canadablower.com/inquiry/index.html

Solar Fans to Reduce Heat Gain From Cathedral Ceilings

Solar fans have simplified attic ventilation. Having been in the business of ventilating attics for almost thirty years, one of the most difficult (and, in fact, impossible) situations to deal with in completed construction is heat buildup in completed rooms or finished attics with “up to the peak” cathedral ceilings. If you’re an architect, builder or homeowner considering cathedral ceilings, I have recommendations you might consider. The present theory, as reflected in most building codes, is that hot air will travel by convection from the soffit vents, through the styrofoam spacers and exit through the ridge vent.

Our experience has been that this theory does not work very well. In fact, the air below the roof can reach temperatures in excess of 150 DegF. That hot air is rapidly expanding. Unable to escape through the ridge and soffit vents quickly enough, it pushes through the porous insulation, heating up the ceiling and creating a tremendous heat gain to the living area. Very often, even a well-designed A/C system can’t keep up.

SUGGESTION: Design a small attic over the cathedral ceiling. A solar-powered roof fan will exhaust heat from the “attic”, creating a vacuum, thereby pulling in cool air from the soffits through the spacers. This creates an envelope of cool air around the living space, (If you already have some flat ceiling, just add a solar fan).   .

These heat gain forces are the same in a regular stand-up attic. The solution is the same.

The living area with cathedral ceiling will be AT LEAST 10 DegF cooler with proper insulation, soffit vents and a solar roof fan, without the A/C turned on.

Please note: insulation contractors should ensure unobstructed airflow from soffit vents to attic.

Solar powered attic ventilation is one of the most cost-effective ways to improve energy efficiency for air conditioning and to improve LEED score. Typical installed cost is about $550 after tax credits are applied. Federal Energy Tax Form 5695. Energy saving and carbon footprint for cooling can be reduced by 10% to 30%. Payback time is less than 5 years. Every succeeding year is money in the bank!

Architects would be well advised to include and specify quality solar fans during the design phase of a project. We have many request from townhouse style condo owners because the upper floors of the unit are warm, even with the A/C turned on. They are prevented from taking remedial action because they can’t get permission from the Condo Association Committee.

A minimum 10% reduction in energy usage (and proportional reduction in carbon footprint) for cooling is a huge number. Moreover, it’s most effective at the exact time when the stress on the “grid” is the greatest, during hot weather. Cost saving to the utility company by not having to upgrade their infrastructure because of reduced peak demand is substantial.

Steve Pineault, http://www.solarfanman.com (TM), has 30 years experience in ventilating attics. SunRise Solar has been an innovator in solar fan design and production. Projected Cost Benefits. All products are made in the USA. To specify or order call 800-FANS123. We free-ship fans to continental US. (Canada, Hawaii, Mexico, Europe, Middle East, Australia, Asia and South America, Call for quotes.) SunRise Solar fans have been installed in every state and many countries throughout the world.. Quantity pricing available for Condo projects, Specify SolarFanMan.com for quality.

Free Reports -
Cost Savings of Solar Power Fans

Catherdral Ceilings: Reduce Heat Gain with Solar Roof Fans -
http://www.solarfanman.com/solar_roof_fans_cathedral_ceilings.php

Why Is The Gable Exhaust Fan So Popular?

To improve ventilation in the attic, which consists of hot air being forced outside through the exhaust system and moisture being prevented from building up during cold weather, you have two primary options – an attic vent fan or a gable exhaust fan. While the concept is the same for both, the installation process and operation are unique.

For one thing, instead of being mounted on the roof as with the turbine type of fan or box unit, the gable style is actually mounted on the gable. Of all ventilation systems used for the attic, the gable fan is considered by industry professionals, as well as consumers as being the easiest to install. For this reason, homeowners who want a cost efficient solution and a type of vent fan they can install will go with the gable.

Once this type of fan has been installed, it works as a highly efficient ventilation system. The way in which the fan functions is that extremely hot air collected near the ceiling is forced out by the exhaust system to the outside. The louvers through which this air goes may or may not be covered with mesh but when purchasing the equipment for a fan used to vent the attic, one covered with mesh is highly recommended in that it prevents animals and debris from getting inside.

Along with forcing hot air from the attic out, a ventilation fan also helps by replacing the hot air with cool air that comes from the outside in. The reason it is so critical that the right type of fan be used for ventilation in the attic, along with quality insulation is that if the hot air were allowed to remain inside, it would cause moisture to build up. With that, your home would be at serious risk for growth of mold and mildew, which are hazardous to a person’s health.

With this type of fan system, vent options include high and low. With the high vents, this refers to a section of the vent system that allows the hot air in the attic to be moved to the outside. For this, you would have a choice of ridge or gable vents. As far as low vents, this part of the system design is actually mandatory to bring cool air from the outside back into the attic.

Along with standard features of a gable exhaust fan, you would have several optional features to consider. For these, the most popular is the thermostat. Because a gable exhaust fan is powered by a motor, a thermostat can be highly beneficial whenever the level of heat in the attic reaches excessive levels.

Want to slash your energy bill with the installation of an gable exhaust fan?

Click Below To Learn More:
http://www.attic-ventfan.com/gable-exhaust-fan.php