Down Rod is the rod connecting fan to the ceiling. Length of this rod has been reduced by fan manufacturers.
Space between blades and ceiling is reduced. With reduced space, less air available.
With less air available, fan blades pull less air. Thus fan ventilates less air in the room.
What’s wrong?
Fan manufacturers increased the rotation per minute for the fans and reduced the length of down rod.
Such fans take more power, means electricity, and throw less air.
Refer Recommended Down Rod Length
Source: http://g2art.wpengine.netdna-cdn.com/wp-content/uploads/sites/10/2013/05/downrod_chart.png
Line of action:
Refer the recommended down rod length needed for fan.
Check the ceiling height of the room. Check the down rod length.
In case, down rod length is less. Call electrician for replacing down rod.
Length for new down rod should match to recommended down rod length.
Get better ventilation in the room.
Benefit:
This will help realize the full benefit from fan. In some cases, buying new AC may also be avoidable.
Recommended links:
Your Well Wisher Program 
Interesting facts.
LikeLike
thanks indeed.
LikeLike
Pingback: Ceiling Fan with higher rpm can throw less air. Longer Down Rod is one solution. | CareWare
Huh – valuable to know,
LikeLike
Very good information. We have a fan in our guest bedroom that is absolutely useless. We get practically no air circulation from it. Now I understand the dynamics that is responsible for that. Thanks again.
LikeLike
That is nice to hear that you uncover the problem cause by reading this post.
LikeLiked by 1 person
We have been facing this issue in the dining-kitchen area and I’m glad I found this post, will definitely try the solution mentioned before contemplating an AC 🙂
LikeLike
Good to hear that…it is of help. regards
LikeLike
The reference diagram above the video is much different than the one in the video:
Above diagram: (9′ ceiling = 12″ downrod)
Video: (9′ ceiling = 6″ downrod).
That’s quite a discrepancy.
Also, the jump from 9′-10′ is very large. This makes it even more arbitrary when it’s in between sizes. I have a vaulted ceiling with the beam at 9’/4″ and the peak of the vault at 10’/5″
Anyone care to explain the discrepancy and let me know what size I need?
Thank you.
LikeLiked by 1 person
your query and quest looks genuine, i have added the diagram and video from different sources on in the internet; that is why it is different. I will see if I can get some standardization on it. will update you. regards
LikeLike
You are absolutely correct. In older homes the length of the rod was more. Nowadays the length is short. Your blog is very informative. Sheen.
LikeLiked by 1 person
Happy with your words. i am trying to contact fan manufacturers . lets see what they have to say. regards
LikeLike
Let’s hope for cooler rooms. Sheen.
LikeLike
Interesting and useful information. Thanks for sharing the chart which makes it easier to understand. 🙂
LikeLiked by 1 person
Nice to hear that it makes an understanding.. hope it helps you anytime in future..
LikeLiked by 1 person