Do you have a hallway mounted fan that bothers you? Want to silence it forever without paying a lot for one of the new rafter mounted systems?

Now you can – using the latest Invisco invention – conversion kits for all the popular hall mounted fans.

An example is the Home Depot GAF LL Building Supply Master Flow 30 inch belt drive fan. Rated at 6000 CFM it is actually a real good air mover. But it is not the most silent one you can find. Invisco put one in our new conversion kit and hung the entire fan and box high in the attic and then ducted it to 2 rooms. After it was installed you could not see it and could barely hear it. The homeowner was elated with the result and saved over $600 compared to buying one of the new rafter mounted systems.

If you are serious about dealing with Home Depot, there are two important facts for you to know.

One, the 30 inch fans might have a defect in their assembly. Invisco bought a fan at the Temecula Home Depot and discovered an error in assembly. Be SURE that you check yours  when you buy it. The error is that the main fan shaft is installed wrong resulting in the belt not aligning properly. You can see the details here

Two, you need to be very careful when you cut into your ceiling joists or you have an installer do that. The joist that is cut must be very carefully supported at the cuts. You can avoid that risk when you use the Invisco adapter box described below. You get the power and quiet operation but you don’t need to see it in the ceiling. Read on.

Invisco is determined to help you get the best performance out of those big ceiling mounted fans. Our engineering department just finished our first product, a box that will adapt the Home Depot GAF LL Building Products Master Flow 30BWHFS Whole House Fan to our revolutionary new box with two 18 inch duct connectors.

This requires a little work on your part to dismantle the GAF machine from the wood frame and steel collar. This requires only a few household tools.

Here are the steps needed:

1. Remove the 8 wood screws that hold the wood frame in the steel plate.

2 Use a 1/4 inch diameter drill to drill the rivets out that hold the motor brace to the steel plate and enlarge the holes from their original 3/16 diameter to 1/4 diameter. You could use a slightly larger drill such as a 9/64 to make the bolts fit easier later.

3. Follow the GAF assembly instructions to remove and reattach the motor and install the belt.

4. Place the ends of the motor brace on the top and bottom edge of  the Invisco duct box.

5. Use the supplied 1/4 inch bolts and wing nuts to tighten the GAF motor brace to the Invisco duct box.

Here is the GAF LL 30 mounted on the Invisco duct box. The box comes apart into 8 panels to make it easy to lift into your attic. The fan comes off the motor and both fit up into most attics.