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Unless you are using an electronic air filter that requires a continuous stream of air, you're better off setting your unit's fan on "auto" and using ceiling fans in occupied rooms. 

The primary difference between 4-blade and 5-blade is appearance. For fans that use identical motors and blade designs, a 4-blade fan will move a bit more air than a 5-blade fan. The reduced weight allows the motor to spin a bit faster increasing the amount of air moved.

The answer can be both yes and no because it solely depends on the material used in manufacturing the furniture. Wood and cast aluminum-based furniture will never rust, but patio furniture made of wrought iron or steel is likely to rust over some time. However, this too depends on the quality of raw material used.

Acrylic-based materials are the best for making cushions for patio furniture. These types of fabrics don't contain any cotton, polyester, or ole-fin fiber. This means you will not have to deal with issues of mildew, stains, or breakdowns. One of the most popular fabrics for patio furniture cushions is Sunbrella.

Unless you are using an electronic air filter that requires a continuous stream of air, you're better off setting your unit's fan on "auto" and using ceiling fans in occupied rooms.

All blades are weighed and grouped by weight. Check for wobble after each step. Check that all blades are screwed firmly into blade holders and that all blade holders are tightened securely to motor. Make sure that canopy and mounting bracket are tightened securely to ceiling joist. Make sure the down rod ball is properly seated into the mounting b