Okay, this presents a few challenges, but we can figure it out. Here's a breakdown of the issues and some potential solutions, along with important safety considerations

Understanding the Challenges
Weight Rating

Ceiling fans are heavy and dynamic (they move!). You must use a fan-rated box. Standard ceiling boxes are not acceptable.

Vaulted Ceiling

The slope complicates things, but a little bit isn't too bad. You'll need to account for that in the mounting.

Wood Thickness

2.5" is substantial. Standard pancake boxes won't work. You need a box that can securely attach to the structure behind the wood.

Mid-Bay Location

Being in the middle of the bay means you can't easily attach to a rafter. This limits options.

14-2 Wire

This is likely sufficient for most modern fans assuming it's on a 15-amp circuit breaker. However,

you MUST verify this. Using 14-gauge wire on a 20-amp circuit is a fire hazard. Also, determine if it has a ground wire. Older wire could potentially not have a ground. This could be dangerous as fans vibrate. Accessibility

Working on a vaulted ceiling can be difficult and potentially dangerous. Safety is paramount.

Potential Solutions (in order of preference/safety/best practice)


The Ideal: Straddling Mount to Rafters with Blocking (Best, but Most Work)



Concept

This is the strongest and safest approach, although it requires the most work. The goal is to distribute the fan's weight across multiple rafters and provide solid support.

Procedure



Access

You'll need to access the space above the ceiling (attic, crawlspace, etc.). This might mean cutting an access hole if one doesn't exist.

Rafter Assessment

Locate the rafters on either side of the existing hole.

Blocking

Install solid wood blocking (2x8 or similar) between the rafters, spanning the distance where the fan will hang. Attach the blocking securely to the rafters with screws and construction adhesive. These blocks should be tight enough to withstand the weight of the fan and be flush with the bottom of the rafters.

Fan-Rated Box with Bracing

Now you can install a fan-rated ceiling box designed to be mounted to the blocking. There are many options here:

Adjustable Brace

A telescopic brace that spans between the rafters, designed to support a fan box. This is often the easiest to install from below if attic access is difficult. Look for ones rated for at least 70 lbs (check the fan's weight).

Direct Mount

You can mount a fan-rated box directly to the blocking you installed. Make sure the box is flush or slightly recessed into the wooden ceiling.2.

Saddle Mount (Acceptable but not ideal)



Concept

This involves running a bar across the bays that the fan is in the middle of, and attaching a fan box to the bar.

Procedure



Assessment

Determine the appropriate length needed to span the bays where the fan is going to be installed.

Installation

Install the bar across the bay, and securely screw it into the rafters.

Mount

Use a fan rated box that mounts to the bar.3.

Fan Rated Ceiling Box (May not be ideal)



Concept

This will involve using an "old work" fan box that will secure to the wooden ceiling.

Procedure



Assess Ceiling

Make sure that the wooden ceiling is sturdy enough to support the fan.

Installation

Install a fan rated ceiling box that uses a clamp to secure the fan to the wooden ceiling.

Important Considerations & Safety First! Disconnect Power

Turn off the circuit breaker supplying power to the existing wiring before doing any work. Verify it's off with a non-contact voltage tester.

Personal Safety

Wear safety glasses. Use a sturdy ladder and have someone spot you.

Electrical Code

Make sure all work meets local electrical codes. If you're not comfortable with electrical work, hire a qualified electrician.

Wire Gauge & Circuit



Absolutely verify that the 14-gauge wire is on a 15-amp circuit breaker. If it's on a 20-amp breaker, you must replace the wiring with 12-gauge wire. Grounding

Ensure a proper ground connection to the fan box and the fan itself. If there is no ground wire in the existing wiring, you may need to run a separate ground wire back to the electrical panel (a more complex task that usually requires an electrician).

Fan Weight

Check the weight of the fan you're installing and ensure the mounting system is rated to support it and its dynamic load (movement). Add a safety margin.

Instructions

Follow the fan manufacturer's instructions exactly.*

Slope Accommodation

For slight slopes, use a fan with a canopy designed to accommodate sloped ceilings. Some come with flexible ball-and-socket mounts. If the slope is significant, you might need a longer downrod or an angled adapter.

Recommendation

The

best and safest approach is the straddling mount with blocking, especially given the wood ceiling and mid-bay location. While it requires more work upfront, it provides the most secure and reliable installation.

Disclaimer:

I am an AI chatbot and cannot provide professional electrical advice. This information is for general guidance only. Consult with a qualified electrician to ensure your installation meets all applicable codes and safety standards. Incorrect wiring or inadequate support can create serious hazards, including fire and electric shock. Flag for review