Broan Standard Economy fans provide versatility, compactness, and economical ventilation solutions. These units contain galvanized steel housing and double-strength mounting flanges. The Broan standard economy series fans offer powerful ventilation, which enables ventilated air inside and further prevents mold and mildew. The Broan 50 CFM Ventilation Fan units also include a removable motor assembly and a plug-in permanently with a lubricated motor that helps in ease of service as well as cleaning.

Model: 688 Features

• A 50 CFM that is sufficient enough to get rid of odors and pollutants from the bathroom area/powder room.
• 4.0 audible sones.
• A compact housing that allows for versatility during installation.
• The units are powerful enough to service rooms of up to 45 sq. ft.
• The grilles have a bright white light that easily blends into most of the ceiling paints.
• Galvanized steel housing that is resistant to corrosion and damage from moisture.
• An AC motor that is permanently lubricated and engineered to be able to carry out continuous operations.
• Mounting flanges that contain keyhole slots.
• A polymeric damper that operates quietly and prevents cold back drafts without any metallic clatter.
• There is an electrical knockout to be removed.
• A removable wiring cover that makes connections away from the tight corners.
• U.L. listed for tub or shower enclosure which has GFCI branch wiring.

Installation Instructions

WARNING

In order to reduce the risk of fire, injury to person(s) or electric shock, you must follow the following instructions:

All electrical wiring and installation work must be done by qualified persons and must always be in accordance with applicable codes and standards that are also inclusive of fire-rated construction.

Sufficient air is required in order for combustion to be carried out properly inside the chimney of the fuel burning equipment so as to prevent backdrafting. The heating equipment manufacturer’s guideline and safety standards such as those that are published by the National Fire Protection Association (NFPA) and the American Society for Heating Refrigeration and Air Conditioning Engineers (ASHRAE) must always be followed.

Ensure that you do not damage the electrical wiring and any other hidden utilities when you are cutting or drilling into the wall or ceiling.

Always vent the ducted fans to the outside.

Mark any units that are supposed to be installed over a tub/shower as appropriate for the application.

Under no circumstances should you place a switch where it can be accessed from the tub/shower.

For those ceilings that are sloped, pitch the installation at about 12/12.

The duct work must always point up.

Installation in Existing Construction

The Broan 688 fan is between the ceiling joists. Plan the duct wiring before you begin with the installation process. Always ensure that:

1. Ducting can be easily installed.
2. Wiring can be run effortlessly to the planned location of installation.
3. There is no wiring or any other form of obstruction that might interfere with the installation process.

Installation From the Accessible Area Above

1. After you have determined the desired location for your Broan fan, drill a small hole through the ceiling and then place a stiff wire up through hole in order to help in locating it from above.
2. Strategically place the fan housing on top of the ceiling surface and use the housing as a template to enable you to mark the area to be cut out. Cut a round hole that is about 131 ⁄8 inches in diameter for rough opening.
3. After cutting out the rough opening, mount housing in the opening using the hanger bars that are provided with the unit. Insert those hanger bars in the slots that are available in the housing. Position the housing in the opening so that the bottom of the housing is in alignment with the ceiling. Use screws or nails to secure the hanger bars on to the ceiling joists.
4. Complete the installation ducting and wiring as described.

Installation from Area Below Ceiling

Note: If you do not have direct access to the area that is above the installation location, make sure that the installation will not interfere with existing wiring, plumbing, etc. and that it is possible for the wiring and ducting to be run to the desired location. It is necessary to use a flexible duct when installing the unit from below.

1. Mount the fan between ceiling joists. Decide on the location of the fan, and then determine where the nearest joists are. Tap the ceiling lightly. A hollow sound means there is no joist while a solid sound means there is one. To be sure you have located a joist, drill a small hole that is about 1/16” and probe into the ceiling with a wire.
2. Locate the joists once again and then drill a starter hole in the ceiling between the joists.
3. Saw a line from the hole to the joist to locate its edge.
4. Remove the power or blower unit from the housing.
5. Use the housing pan as a template to enable you to mark the cutout: place pan between the joist and then trace around the pan.
6. Make the cutout along the outside of the line you previously marked.
7. Install 2 by 4 cleats to both ceiling joists. The distance between the cleats must be at least 91/8 inches but not more than 10 inches.
8. Remove side wiring knockout and then insert and secure an approved box connector inside the wiring entrance hole.
9. Use a pair of pliers to bend both mounting tabs as close as possible to the side of the housing.
10. Install the duct collar.
11. String wiring through the box connector and then connect a 4 inch flexible duct to the duct collar.
12. Push ductwork and wiring back into the cutout carefully and then place the housing in it.
13. Use wood screws to set the housing to cleats securing through four holes that are in the housing’s pan. Make sure the pan is in close contact with the finished ceiling.
14. Install the power and blower unit to complete the installation process.

Broan is the leader in residential ventilation products, customized climate, and indoor air quality solutions. Find more Broan products here!