Fan Calculations - Measure Airflow with CFM

With one formula, you can find what fan is right for your home. This is the formula for fan CFM: Cubic feet per minute, more commonly known as CFM is calculated by the following formula: air speed (feet per minute) X area (square feet)=CFM. Not everyone is going to take a look at CFM, but for those who do it is a helpful tool. In simpler words than that of the formula, it is the amount of air a fan moves.

Fan Calculations - Measure Airflow with CFM

Fan Calculations - Measure Airflow with CFM

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Fan Calculations - Measure Airflow with CFM

Fan Calculations - Measure Airflow with CFM

The amount of air depends on some other factors as well, such as the diameter and shape of the blades, speed at which the blades turn (revolutions per minute or rpm), horsepower (hp) of the motor, and overall fan design. These combined factors establish the air moving capacity of a fan. Fan capacity is measured in terms of the cubic feet, and again, this is how CFM (cubic feet per minute is determined.)

CFM and RPM are the two most important things to look for in a fan, so that you are guaranteed correct and effective operation. If you only know the RPM, and not the CFM, or vice versa, you should feel confident in your fan purchase. As long as you know one of the calculations, you are ensured of a well-working fan. However, if you are not satisfied with these calculations, this is not the only criteria one can use for evaluating fan performance.

One of the main qualifications, second to rpm and CFM measurement is noise level or decibel rating, followed by the next qualification of vibration. Look for fan noise levels rated in sones or decibels. Check these if the CFM or RPM still leave you unsettled about your fan choice.

A standard measurement of airflow indicates how many cubic feet of air passes by a stationary point in one minute. The higher the number, the more air is being forced through the system. The volumetric flow rate of a liquid or gas in cubic feet per minute equals the CFM, and one CFM equals approximately 2 liters per second.

Fan manufacturers base their measurements on a standard measurement with clean, dry air at a density of 0.075 pounds mass per cubic foot, barometric pressure at sea level of 29.92 inches of mercury, and a temperature of 70°F. These standard measurements are used to determine SCFM: Standard Cubic Feet Per Minute.

With the use of CFM and RPM, you can make a more educated choice when choosing your home ceiling, exhaust, or table fan, and know what you are getting!

Fan Calculations - Measure Airflow with CFM

Giving Your Living Room a Taller Ceiling - A Few Simple Tricks Will Fool the Eye!

If your ceilings are low, it can make a room look smaller and more closed in. You can make your ceilings look much higher, visually opening up the room! A few simple tricks can transform your living room from one that looks claustrophobic to one that looks spacious, airy and open. In this article you will find several useful techniques for expanding your living room, giving the impression of a higher ceiling.

Giving Your Living Room a Taller Ceiling - A Few Simple Tricks Will Fool the Eye!

Giving Your Living Room a Taller Ceiling - A Few Simple Tricks Will Fool the Eye!

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Giving Your Living Room a Taller Ceiling - A Few Simple Tricks Will Fool the Eye!

Giving Your Living Room a Taller Ceiling - A Few Simple Tricks Will Fool the Eye!

Remove wall applications that shorten the walls

Things that make your walls look shorter visually bring the ceiling down. For this reason, you want to remove any chair rails, paneling, wallpaper or other applications that go only halfway up the wall. This type of decorating chops the wall up, making it look much shorter than it actually is.

You want to avoid when making your ceilings look higher is cutting your walls in half with paneling, wallpaper and other decorations. If you love paneling and want to use it, choose a light shade and take it all the way up the wall to the ceiling.

Tricks to make your ceiling appear higher

One easy way to make you ceiling appear higher is to continue your ceiling color on to the wall. If your ceiling is tan or cream, continue the color down the wall in a single horizontal stripe. Consider ceiling tiles made of metal to give a mirror effect; the reflection makes the room appear larger than it actually is. A white tile will also make the ceiling appear higher.

Paint is an easy way to raise your ceilings, and it is also affordable and within most budgets. To keep your ceiling from closing in on you, consider painting both your walls and your ceiling an off-white or sand color. Light colors open up spaces; dark colors diminish.

Another good idea is to hang a slim light fixture or ceiling fan in the center of the room to draw the eye upward. Avoid bulky or thick looking fixtures, as they can make the ceiling seem lower.

Curtains and accessories can make the ceiling visually higher

A few easy, subtle changes can make your ceiling appear higher. Consider hanging curtains or draperies close to the ceiling; the long line of the curtain will make the room appear taller. Avoid drapes that are short or stop at the window sill, rather, take them to the floor instead. Stone around a fireplace, when taken all the way up to the ceiling, will elongate walls and make the ceiling seem higher too.

Choose accessories that offer a long, slimming effect. Artificial trees that are taller than usual, tall vases filled with dried flowers, and a bookcase that extends to the ceiling will all add height to your living room, making a short ceiling seem much taller.

Older homes often have very short ceilings, which can give a room a squatty effect. Use the tips above in decorating your living room, and you will see that the room looks open and much more spacious!

Giving Your Living Room a Taller Ceiling - A Few Simple Tricks Will Fool the Eye!

Cooling Fan Problems

Cooling fans are easy to troubleshoot. Some automobiles use two smaller fans or one larger fan. The twin electric fan set up will use one fan for cooling the engine. The other fan will be used for cooling the air conditioning and radiator but only works with the ac on. Never continue to run the vehicle up in the red temp zone or you can cause severe damage to the engine. First do you have a temperature gauge in the dash? Is it working correctly?

Cooling Fan Problems

Cooling Fan Problems

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Cooling Fan Problems

Cooling Fan Problems

Lift the hood and verify visually that the fan is not working. Does the car cool down once you drive up the highway at 40+ mph? If not, you may have a thermostat sticking or low coolant. The thermostat can cause the engine to stay hot. This can also be the problem if the gauge stays low and the car never heats up. If the temp gauge is reading low yet the two radiator hoses are warm, the temp sensor may not be working. There may also be two temp sensors or senders, one that controls the gauge and one to switch the fan on. If the temperature is getting high and the fan still won't come on you may have a fan problem.

First check the fuse to the cooling fan, if bad, replace it. When the car is getting hotter than normal and the fan should be on, unplug the fan wire. The cooling fan wire will have two wires positive and negative, and should be putting out 12 volts dc. If there is no voltage check the wires and the fan relay. The cooling fan relay is usually under the hood. If there is voltage running to the cooling fan, you probably have a bad fan. You could try jumping wires to the fan directly from the battery, but there is no need if there was voltage there.

Cooling fans can be purchased from places like autozone for aftermarket or factory replacements from a dealership. If you decide to use aftermarket measure the dimensions first. Then check the fan to verify that the cfm rating is high enough for your type of engine. Also make sure the wires for the electric fan are to the correct polarity. If not it wont damage the fan but will spin backward. The fan should pull air from the front of the vehicle and push it out through the radiator.

Cooling Fan Problems

Another air-conditioned alien cast Ceiling Fan

Another air-conditioned alien cast Ceiling Fan Video Clips. Duration : 1.37 Mins.

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