Important Things to Verify When Customer Is Not Sure If the Dryer Duct Was Installed Properly.

1.  The Recommended Type of Duct:

   Use a SEMI-RIGID ALUMINUM or RIGID GALVANIZED STEEL duct that is 4 inches (10.2 cm) in diameter.

   The down side of metal duct is that once it's crushed, it must be replaced, it won't return back to its original size and shape.

   And crushed duct will reduce the airflow and cause a restriction and error code.

2.  Not Recommended:

   Do not use a flexible duct with a thin foil wall.

   Serious blockage can result if a metal duct is bent too sharply.

   Never install any type of flexible duct in walls, ceilings, or other concealed spaces, use rigid duct only.

   The total length of the flexible metal duct must not exceed 8 feet (2.4 m).

   We DO NOT recommend using plastic flexible duct because it is a FIRE HAZARD and it can kink, sag, be punctured, reduce airflow, extend drying times, and affect dryer operation overall.

   Always secure the duct's joints with aluminum duct tape.

   Do not assemble the duct with screws or other fasteners that extend into the duct and catch lint.

   Never install a screen over the exhaust outlet.

Flexible Duct with A Thin Foil Wall:

Plastic Flexible Duct:

Crushed Semi-Rigid Aluminum Duct:

3.  Recommended Duct Length and Size:

   Exhaust systems longer than recommended can extend drying times, affect machine operation, and may collect lint faster.

   Keep the exhaust duct as straight and as short as possible; make sure the air exhausts freely.

   Do not use ducts that have multiple elbows.

   To estimate the duct length, use the below table.

   Every 90-degree elbows must be considered, from the dryer to the outdoor hood.

   The exhaust duct should end with an exhaust hood with a swing-out damper to prevent back drafts, condensation and entry of wildlife.

   The hood opening should point down to reduce condensation and lint buildup.

   Never use an exhaust hood with a magnetic damper.

   The hood should have at least 12 inches (30.5 cm) of clearance between the bottom of the hood and the ground or other obstruction under the hood.

   Recommended Duct Length (Max 50 feet)

   Recommended Duct Size (4 inches in diameter)

Elbow:

4.  Vertical Duct Installation:

   If the dryer is located in a basement but venting out on the roof, it means it's a vertical duct installation.

   There are 3 main issues with vertical duct installation.

a)  When the weather hood is clogged, customer will have to hire a professional duct clean to climb on the roof and clean it, and it's not visible for the customer to see if it's clogged or not.

b)  Lint accumulates faster and build up along the vertical duct, the longer the duct, the harder it is for the dryer blower fan to vent heavier dust particles to the outside of the house, heavier particles falls down an accumulate at the lower part of the duct.

c)  When the outside temperature is below 0-degree Celsius, condensation forms at the end of the duct, then water drips down to the lower part of the duct, which creates a blockage in the duct itself, especially if the weather hood flaps don't close when not using the dryer.

Vertical Duct:

5.  Vent Blockage Test:

   Please ask customer to run the "vent blockage test" cycle (see user manual for instructions)

Note: The "vent blockage test" must run with the dryer in a cool state and empty.

   If the dryer is warm, run the "AIR FLUFF" cycle for several minutes to reduce its internal temperature.

   The "vent blockage test" automatically detects the airflow and reports any blockage or restrictions.

   Proper ducting can reduce drying time and save energy as well.

   After the test: If the message "CLg or Cg, C8 or C80, C9 or C90" appears on the display, it means the airflow is restricted somewhere.

   If the dryer was recently installed (less than 30 days), please ask customer to call the installer to verify the duct airflow and voltage.

   If not recently installed, please ask customer call a duct cleaner, to clean and test the duct and request a detailed report to prove that it is clean and pictures, then call us back for service.

*You can see additional exhausting requirements can be found in the user manual for your dryer.

Warning: To prevent fire, do not use plastic, thin-foil, or non-metal flexible ducts of any kind.

Do not use crushed or clogged venting or ducts.

6.  Do Not Exhaust the Hot/Humid Air Indoor:

   Doing so will reduce the performance of the dryer, dryers are designed to take air from the room and blow it outside.

   If the hot and humid air is released in the room, it'll circulate back to the dryer.

   All dryers must be exhausted to the outside.

   Exhausting the dryer to the outside will prevent large amounts of lint and moisture from being blown into the room.

   Do not exhaust dryer into any wall, ceiling, crawl space, or concealed space of a building, gas vent, or any other common duct or chimney.

   This could create a fire hazard from lint expelled by the dryer.

   Also lint will accumulate faster and reduce the life-time of the appliance.

Indoor Dryer Duct: