If you have an open home with 9 to 12 foot ceilings, then you likely have a spacious living area. However, this area may be quite expensive to cool during the summer months. Since hot air rises, you can reduce your AC usage by having attic fans installed. This will help to ventilate the upper areas of the home so heat is less likely to accumulate. Attic fans are fairly simple to install and attach to a thermostat. However, you may hear some noises as the fans are running. Thankfully, most noise issues are easy to fix.
Whirring Sounds and Slow Speeds
If your fans are set on the highest setting and you notice the fan creating a whirring sound and they are moving slowly, then you likely have an issue with the intake of air. Attic ventilation systems require a balance between air intake and exhaust, or the system will not be efficient or effective. The air intake pulls fresh outside air into the attic. The air flow moves hot air towards the fan where it is released out of the roof. Poor airflow into the attic will stall the movement of air to the fan.
You can increase air intake a few different ways. If you have a skylight or a window that is close to the attic space, then you can open it to increase airflow. Open windows directly across and opposite from the fan are best to create a consistent cross breeze. If you do not have a window or skylight in the area, then you will need to have another vent installed along the roof. A soffit or eave vent can be added to the edge of the roof or an exhaust vent can be placed close to the roof peak.
If you want to add vents yourself, then consider the ones that can be Installed along the soffit. These vents are easier to install, but make sure to consider the whole area of your attic so more than enough vents are added for proper air intake.
Most fans make humming noises as they run, and the noises are not typically bothersome. However, if you like to keep a quiet home and also want the fans to run at high speeds, then the noises may be a bit too loud for you. Fans make humming sounds normally as the blades move against the air. The bigger the blades, the more noise you will hear. You can invest in a fan that has more blades than the one that is currently installed. The blades will be smaller and make less noise, but they will still move the same amount of air through the exhaust vent. For example, switch from a three blade fan to a five blade variety. Hex nut attachments typically keep the fan blade in place, so use a socket wrench to remove the nut when you are ready to replace the blade.
Some attic fans need to be lubricated on occasion, and adding oil to the fan motor can help to reduce noises. Look to see if your fan has oil ports where oil can be added. These ports will be located on the motor housing and they will look like small round protrusions coming out of the side. Place several drops of a non-detergent lubricating oil in each opening.
Attic fans can do a good job of keeping attic spaces cool during the summer months. You may hear some noises while the fan is working, but you can typically reduce sounds fairly easily. If you cannot stop some of the noises from occurring, then make sure to contact a local contractor who installs and maintains attic fans or visit websites like http://www.greenpenguininsulation.com.