Dryer Vent Extension

When dryer lint builds up in the dryer vent pipe, it can drastically slow down the time it takes to dry clothes. Danny demonstrates how a dryer vent booster fan (Fantech DBF110) can help solve the problem.

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Backed by his 40-year remodeling career, Danny served as the home improvement expert for CBS’s The Early Show and The Weather Channel for more than a decade. His extensive hands-on experience and understanding of the industry make him the go-to source for all things having to do with the home – from advice on simple repairs, to complete remodels, to helping homeowners prepare their homes for extreme weather and seasons.


  1. We are in need of an inline fan, but our ducting runs inside the walls and is not accessible except for the metal piece coming from the wall to the dryer, and the part the vents to the outside. Is there an inline fan that can be installed on the exterior, where the vent exhausts to the outside?

  2. Yes Kristi, there is an exterior fan that works just like the inline ones. They are more expensive 125+. I think fantech makes them as well. I could be off, I researched this last year. Just do a web search for exterior dyer booster fans. You should be able to find something.

  3. Is it common for a dryer boost fan to have water dripping from it??? I have noticed when my wife is drying towels for example there is a lot of moisture…. Water will actually drip from my dryer boost fan, which means my dryer ducting will rust out eventually??? This is in a new home, what should I do????

  4. I get water built up in my lines which are probably just a little to long, but are not clogged and my cloths dry in one cycle. I think this booster fan will help am i right?

    I have the same situation as Kristi my vents are inside the walls except for a 8 inch piect comming down from my celling. can this be hooked up there or is it to close to the dryer, will the prssure of the fan blow out my fire?

  5. WE live in a westward facing condo on the 12th floor in Denver, Co. I have the dryer vent booster and it has worked fine. I had a guy come and clean the venting which runs about 30′ to the outside. Since he was here the thing runs all the time if the wind is blowing hard from the West…. the dryer isn’t on it just goes on and runs and then stops and then the wind causes it to go on again??? There evidently is a baffle inside near the exterior and he did have to reattach it after the cleaning What is going on??? it didn’t do this before. is the baffle on backwards or what??

  6. All looks good except only using a brush with no air pressure to clean the dryer vent is pointless. We use a duct blower to blow air through the vent while also using a brush to make sure everything is removed from the corners etc inside the pipe. Using the blower also allows us to find and repair any breaks or leaks in the system. Using a 3 or 4 inch pellet chimney brush and poly rods allows us to clean the entire length of the system no matter how long.

  7. I have looked at many, many online Video Demos over the years and frankly VERY few of them were worthwhile to me.
    That is until today when i have, for the 1st time, found your site.
    I have looked at multiples of the Videos on your site and i just want to compliment you on how well done these Videos are.
    Your presentations are Straightforward, very easy to understand and follow, even for those who have never done what you are demonstrating. Your Presentations are filled with very easy to understand, step by step, Professional explanations that walks us each through what you are doing AND WHY IT NEEDS TO BE DONE and your tone of voice and easy going demeanor make us feel as if you really care about helping your listeners successfully understand what truly is the best way to do each particular Project.
    Just giving you and your site a 5 star review. A wonderful Job, Danny and Crew. Keep up the great work!
    This world needs more, authentically great, folks such as you

    jjeffrey hosman


  8. when venting the dryer straight up to the roof like it appeared in the video, is there a possibility of lint going onto the roof? is there a lint trap that needs to be installed lower?

  9. when venting out a stackable washer/dryer, I purchased a metal 4″ x 8’vent piping and attached it to the dryer. the laundry room in my condo has no way to vent outside and where should the end bucket be placed? on top of the water tank or on the floor.? please reply, I know as little turns as possible and more than 90 if possible. also water in tank to grab lint. thank you

  10. My dryer Vent does straight up to the roof from within the wall behind the dryer. No attic access. Is the fan on the dryer strong enough to always vent the dust out of the roof? If not, what do you suggest? If it needs a booster fan, where would you place it?

  11. Hello, I am looking for something a little similar to controlling heat, lint and moisture from my dryer which is in the interior half bath downstairs. The wall for the washer and dryer is directly vented into the garage. My house built in the late 70’s with 2 1/2 levels over the garage and up stairs for the main floor. The entire house is surrounded by brick on first floor. I want to point out when going into the garage, one step down is needed. The garage has one level of cinderblocks floor the perimeter of the garage. The vent for the dryer is not on the ground, but still messy. Can you please give any suggestions on containing the messy. Thank you, Susan

  12. I just blow out the dryer exhaust line with my leaf blower which has a round nozzle that fits right into the line. You should see the lint fly out of the outside vent!

    • Hi, Lakeesha,
      Many areas have a specialist who exclusively works on dryers and dryer vent extensions, but we’ve also seen heating, ventilation and air conditioning specialists work on these installations. Your best bet is to check the phone book and ask around to see what’s available in your area!
      Good luck. 🙂


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