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You should generally avoid using WD-40 on a ceiling fan. While it might quiet a squeak temporarily, it is primarily an anti-corrosion and water displacement agent, not a true lubricant, and can damage the fan's components over time. Most modern ceiling fans have sealed bearings and do not require oiling, so a squeak may indicate another issue. For fans that do require lubrication, it is better to use a light machine oil, 30-weight motor oil, or a lubricant specifically designed for ceiling fans.

Ceiling fans are very often worth the investment because they improve comfort in your living space and help reduce utility bills. In the late spring and early fall—and even in the summer in some areas—homeowners with ceiling fans can often get away with open windows and fans, which can cut down on cooling bills and also reduce wear and tear on the HVAC system. Over time, ceiling fans can pay for themselves by saving you money on electric bills and air conditioner repair and maintenance.

Some disadvantages of a blower cooler—a type of cooling device sometimes known as a swamp cooler—are its increased energy demand and its higher noise level. Blowers require more energy to run because they push air out at a higher pressure. This also means a blower cooler can be louder than a fan. Blower coolers are also not recommended for humid areas because humidity limits their cooling potential.

Regularly clean fan grilles, check for dust buildup, and ensure proper venting to prevent mold growth.