Attic fans are a cost-effective and energy-efficient way to keep your home cool and comfortable during the hot summer months. By removing hot air from the attic, whole house attic fans help reduce the strain on your air conditioner and lower your energy bills. If you’re looking to install a whole house attic fan, this comprehensive guide will provide you with step-by-step instructions and helpful tips to ensure a successful installation.
1. Choosing the Right Attic Fan:
Before you begin the installation process, it’s crucial to select the appropriate attic fan for your home. Consider the following factors when making your choice:
- Attic Size: Measure the square footage of your attic to determine the appropriate fan size. Generally, a fan with a capacity of 1,000 CFM (cubic feet per minute) is suitable for every 750 square feet of attic space.
- Roof Pitch: The pitch of your roof will determine the type of attic fan you need. For roofs with a pitch of 3:12 or less, you’ll need a low-profile fan. For roofs with a steeper pitch, a high-profile fan is required.
- Noise Level: Consider the noise level of the attic fan, especially if your bedroom is located near the attic. Look for fans with a low sone rating (a measure of loudness) to minimize noise disturbance.
2. Preparing the Attic:
Once you’ve selected the appropriate attic fan, prepare the attic for installation:
- Clear Obstructions: Remove any insulation, boxes, or other objects that may obstruct the airflow from the fan.
- Install a Baffle: A baffle is a device that helps direct airflow from the fan towards the vents. Install a baffle directly below the fan to maximize its effectiveness.
- Seal Air Leaks: Seal any air leaks around the attic access door and other openings to prevent warm air from entering the attic.
3. Installing the Attic Fan:
Follow these steps to install the attic fan:
- Mark the Location: Determine the location for the fan on the roof. Ensure it’s centered and at least 3 feet away from any roof obstructions.
- Cut a Hole: Using a power saw, carefully cut a hole in the roof according to the manufacturer’s instructions.
- Mount the Fan: Position the attic fan over the hole and secure it using the provided mounting hardware.
- Connect the Wiring: Connect the fan’s wiring to the electrical circuit according to the manufacturer’s instructions. Ensure the circuit is properly grounded.
4. Installing the Attic Fan Thermostat:
To control the operation of the attic fan, install a thermostat in the attic:
- Choose the Location: Select a location for the thermostat that is not directly exposed to sunlight or heat sources.
- Mount the Thermostat: Mount the thermostat on the wall or ceiling according to the manufacturer’s instructions.
- Connect the Wiring: Connect the thermostat’s wiring to the attic fan and the electrical circuit.
5. Installing the Attic Fan Vent:
The attic fan vent is essential for exhausting hot air from the attic:
- Choose the Location: Select a location for the vent on the roof that is opposite the prevailing wind direction.
- Cut a Hole: Cut a hole in the roof according to the manufacturer’s instructions.
- Install the Vent: Position the vent over the hole and secure it using the provided mounting hardware.
6. Testing the Attic Fan:
Once the installation is complete, test the attic fan to ensure it’s working properly:
- Turn on the Thermostat: Set the thermostat to the desired temperature and turn it on.
- Activate the Fan: Manually activate the attic fan using the switch provided.
- Check the Airflow: Verify that hot air is being exhausted from the attic vent.
7. Maintenance and Troubleshooting:
To keep your attic fan operating efficiently:
- Regular Cleaning: Clean the attic fan blades and housing regularly to remove dust and debris.
- Inspect the Wiring: Periodically inspect the fan’s wiring for any signs of damage or loose connections.
- Lubricate the Motor: Lubricate the fan’s motor according to the manufacturer’s instructions to ensure smooth operation.
Beyond Conclusion: Unlocking the Benefits of a Whole House Attic Fan:
Installing a whole house attic fan offers numerous benefits, including:
- Energy Savings: By reducing the reliance on air conditioning, attic fans can significantly lower energy consumption and save money on utility bills.
- Improved Comfort: Attic fans help maintain a comfortable indoor temperature, especially during hot summer months.
- Extended Roof Life: Removing excess heat from the attic can help extend the lifespan of your roof by reducing the wear and tear caused by extreme temperatures.
- Reduced Noise: Unlike air conditioners, attic fans operate quietly, providing a peaceful indoor environment.
Frequently Asked Questions:
Q: How much does it cost to install a whole house attic fan?
A: The cost of installation varies depending on the size and type of fan, as well as the complexity of the installation process. On average, expect to pay between $500 and $1,500 for professional installation.
Q: Can I install a whole house attic fan myself?
A: While it’s possible to install an attic fan yourself, it’s recommended to hire a qualified contractor if you’re not comfortable working with electrical wiring or roofing. Improper installation can lead to safety hazards and reduced performance.
Q: How often should I run my whole house attic fan?
A: The frequency of use depends on the climate and your comfort level. Generally, running the fan for 1-2 hours in the morning and evening during hot weather is sufficient to maintain a comfortable indoor temperature.
