Most fan bodies including mounting hardware are 8 to 12 inches. So, whatever your ceiling height is in feet, buy a downrod that will put the top base of the fan at 10 feet. Then, after adding the rest of the fan into the equation, you will almost always find that your fan is hanging very close to the desired 9' level.
After the rest of the fan is assembled, this will put the bottom of the ceiling fan right at 9 feet above the floor. Only drop it enough for the blades to clear the ceiling by max of a couple of feet.
If you have a flat ceiling this will be easy to calculate, but if you have a peaked cathedral ceiling you will need to measure down from where your new ceiling fan will be installed.
In doing this, as you measure towards to the ceiling, be sure to keep your measuring tape parallel to the floor. It will become much less efficient at bringing heat back down to the living level if is installed too far away from the ceiling. For those of you that understand the benefits of using your ceiling fans year round, you will want to half the distance between the two suggestions above.
This will allow your ceiling fan to be just as beneficial during the winter months as it will be during the summer months. This will keep the fan up high enough so that it is still a useful appliance during the colder months, yet low enough to be very efficient during the warmer months.
Not only this, but following this method will make the look of your new ceiling fan much more atheistically appealing in relation to the room. It will keep the fan 8 feet high from the floor and far away from the ceiling. The problem is when the ceiling is not high enough, and it has a large slope. For example, a roof with a degree slope and 10 feet high at its highest point. First, imagine a sloped room with a width X, smallest height Y1, and highest height Y2, as shown in the picture below.
As you can see from the above picture, the rise of the roof, which is the difference between the highest and the lowest points of the sloped roof is Y2 — Y1. The run of the roof is X. Even though the dimensions are given in feet, we are dividing the same mathematical units. So, the above ratio we got can be applied to calculate lengths in inches as well. As you can see from the above picture, the angle of the roof and the angle made between the fan blades and the ceiling is the same.
Therefore, we need to add more clearance between the fan and the ceiling. Instead, hold a inch ruler horizontally with one of its ends touching the ceiling. Then measure the vertical height from the other tip to the ceiling using another ruler. Use this vertical height as the rise of the ceiling and the 12 inches as its run.
Now that we know the minimum downrod length for the fan, the next question is where on the sloped ceiling the fan should be hung. But when it is too short, the imbalance may be invisible to your eyes, thus damaging the engine.
If the length of the downrod is excessive, then the ceiling fan itself may pose a safety hazard as the ceiling fan blades are too close to the furniture and floor. That is when in a workplace, people go around with a portable ladder or anything that could touch the ceiling. Another reason not to have a longer downrod than needed is the influence that outside gusts of wind may have on the fan.
If there is no isolation between the room and the outside, the wind will be a problem. If the wind can push the ceiling fan, then a too long downrod can only pose an additional problem. The appliance will have to handle two forces the wind and gravity at the same time. This could result in overload stress and cause the downrod to break or bend.
Besides, if you keep pieces of furniture next to the blades of the ceiling fan, the airflow will be more turbulent and less pleasant. Ideally, you want to maintain a distance of at least seven feet between the blades of the ceiling fan and the floor.
Here is the best procedure if you need to install a new appliance. Once you manage to find a place to install a ceiling fan to keep the suggested distance, read the instruction to find out which distance does the manufacturer recommends. Usually, it is between two and eight inches. Different models may have varying recommended lengths for their downrods. If you already installed it, and you own a reversible model, consider shortening the distance to a more appropriate height in case it is different.
Otherwise, lengthen it a little if you only use it during summer. Each model comes with its more appropriate instructions. Generally, it is anywhere between two and eight inches in regular houses. A ceiling fan should hang from a ceiling no less than two inches in order to function faultlessly without causing any overload stress to its engine. However, rooms with a very high ceiling prove to be an exception to these guidelines. These rooms may require to hang the ceiling fan s at a longer distance from the ceiling to reach the optimal distance from the floor.
Not every ceiling fan has a downrod. But, that is because the manufacturer produced a flush-mounted ceiling fan. You can recognize these models pretty easily because of their design. Generally, flush-mount designs look better without a downrod.
They may come with an ancillary downrod. What you do when you install them is to remove the downrod from the base and hang the ceiling fan directly on the hooks that would contain the downrod. Finally, you work on the cables and set everything up. The most crucial aspect to consider when installing these models is security.
Make sure that each screw gets stuck in the ceiling to avoid accidental knocks that could make the appliance fall. It is not possible to add a downrod to every model.
Manufacturers specify which model requires a downrod. They create some flush-mounted model expressively without a downrod. Some manufacturers may also provide ceiling fans that cannot exchange downrod with other models or use a universal downrod. However, many models allow adding a longer downrod.
If you need to add a longer downrod, you may want to consider ceiling fan models that come with other extra features like stabilization cables to lessen the impact of stronger vibrations due to the length of the downrod.
Shortening the length of a downrod should regularly be possible.
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