- Tjernlund LB2 No-Clog, Zero Maintenance DEDPV Dryer Duct Booster Fan with Automatic Activation

This fan is a beast! Moves air like a jet engine slightly above idle. I had to mount it horizontally above my first floor with has a 2 x 12 stud bay. That was barely enough room for the install. I also had a challenge with the silicon pressure sensor tube, in that orientation (180 degree flip wouldn't work because the tube would then be pointing down and collecting moisture) the tube can get pinched by the bracket. I had to sleeve the tube with polyurethane tubing to create a stiff sleeve to protect it. Also, my first install didn't work. The fan would run its calibration for 7 seconds exactly and then after 5 minutes of quiet time when the dryer turned on it failed to switch on. I removed my install and after some digging with AI I bridged pins 1 & 2 at J9 on the PVC Ver 02 board. This, supposedly, puts the fan into a higher sensitivity mode and it seemed to work. I used a 2.54 mm jumper cap to bridge the connection. After a bench test (leaf blower in the garage) it worked and I was comfortable enough to wrestle it back into position in my ceiling. The fan works great now. Every once in a while it has some logic fault but I plugged it into a remote switch so can I can turn it off and have it recalibrate which fixes any issues. It doesn't happen often but when it does it's nice not to have to go unplug it or trip circuit breakers. Please contact company support, I solved my problem but not sure the company would have made that recommendation. My run is not that long, maybe 20-30 feet which is at the bare minimum for this unit. I, however, am a believer in moving a lot of air through a dryer and can attest that my clothes dry in half the time. I hope to never have to climb up there to clean it out but we shall see in a year or two. This is a huge step up from Fantek which I had before and had to drill holes in the housing to blast lint out of it with my air compressor. Keep in mind his fan is mounted with rubber shock absorbers but I also screwed the bracket onto my ceiling joists with rubber pads under the bracket for more vibration absorption. So far it has been quiet and moving a ton of air through my duct. Very happy although it took a lot of trial and error to get it working in my location.

Our dryer vents up into our attic. Ive put off getting a booster fan for many years. We bought a new washer dryer set and I had to finally put one in. I looked at all the booster fans available and decided to drop the coin on this unit. I gave it four stars for ease of install. Some notes about that. The instructions are VERY good, but if you do not have DIY skills it may challenge you a bit. But, if you can run some ducts, wire up a outlet, and read a measuring tape, it shouldn't be too difficult. The one goof I made is I installed it backwards at first. As it senses pressure to turn on it didn't work. totally my fault. I turned it around and viola! This thing is very sensitive. Pressure wise I mean. I had it all hooked up and was testing it. Everything worked great. My dryer was pulled out from the wall about 2'. So I pushed it back and in doing so the flexible ducting from the dryer to the wall changed shape a bit. Tried the dryer again and the booster fan wouldn't turn on. No big deal just had to re-calibrate the fan. Which just involves unplugging it and plugging it back in. One thing I have noticed with my washer and dryer being in my garage is I do have to re-calibrate the fan with the season changes. Again no big deal, just unplug and plug back in. The BEST part about this fan is the amount of time it has taken off our laundry cycles. We went from over and hour to dry a big load, to less than 30 minutes. I have never had it not turn on, has a ton of power, and its dang quiet. After reading some reviews on other fans, just spend the extra $$ and buy this one. Buy once cry once. 5 years later and the unit is still going strong. The recalibration issue with the seasons has happened less and less. I don't think I've had to do it for about 2 years. The one thing I forgot to mention is, make sure you clean your lint trap EVERY LOAD. You should be doing this anyway, but especially with this booster. We keep a basket right in front of the dryer to drop the lint into and it has become a habit.

I just finished installing an LB2. In my case, the solid 4” vent went straight up an 8 foot ceiling, came out of top rack, went into an Omni-elbow, another straight pipe at a 30 degree angle for 6 feet, and then a final elbow to go out the roof. When we moved in, clothes wouldn’t dry at all. We cleaned out 3 shopping bags of lent, and then the dryer worked great. The next year, it wasn’t very dirty, so we left it for 5 years and then it didn’t dry well at all. Again we cleaned it and bought this LB2. Some Mounting Tips: Mine didn’t come with instructions, but it came with brochures. From the brochures, I was able to figure out how to attach the included mount to the actual LB2 itself. Then I realized, the mount needs to be mounted such that the bottom of the “L” was actually under the LB2. Since it would be difficult to attach the mount to a surface with the LB2 attached, I realized the mount needed to be attached to a mounting structure first, and then the LB2 attaches to the included mount. Preparation and Mounting: First, I did some electrical work in the attic so I would have a plug close to the motor. That took a few hours in my case. Second, I took out the 6 foot pipe that went to the roof. I cut a 6 inch piece of treated 4x4 I had left over from when I built my fence. I used strong wood glue and 4 inch screws to attach the 4x4 to a cross beam. I mounted the LB2 and then I used the stiffer flexible aluminum piping to attach it all together. I also got a 4 inch y from Amazon and hooked that up as a future “clean out” so I could clean the lent from the attic side in the future. Low-Voltage Details: The low-voltage cord was super long—way too long for me. I recommend using a 1-gang low-voltage bracket to attach the wall plate in the laundry room. I know the plate makes it look like a 2-gang, but there’s only screws for the 1-gang. I cut the cord way shorter with plenty of slack still. Stripped it (18 gauge solid) and the didn’t know how to hook up the wires to the plate. It’s labeled, but in my experience, G is for ground. But there’s G, R, and Grnd. And the colors were G, R, W. So I googled and found —-oh, there were instructions !!! Lol!! The white cord goes to Grnd, which was my first guess anyway. Pressure Tube: After having seen the instructions, I checked the little pressure tube. Glad I did before I plugged the LB2 in. Because the nipple had punctured through the tube. So, I pulled off the tube and snipped a bit off and reconnected it. That worked perfectly. Calibration and Success: After having found instructions, I followed them regarding the “calibration process” and it seemed to work perfectly. First “test” with the dryer after calibration worked great. We washed a load of sheets and blankets and it took the dryer 50 minutes. That’s about typical for that load when the dryer vent is clear. So, it seemed to be no big saver with that datapoint, but the LB2 turns on and off correctly. We washed towels and it took 1 hour and 42 minutes. When the vent was clear, it typically took 1 hour 50 minutes. But…the dryer actually ran correctly with the automatic setting. That’s never happened before. Normally, when we would run it with that setting, it would kick off after an hour and not be dry. So we would have to use “timed dry” for 50 more minutes. All in all, houses shouldn’t be designed so that dryer vents go up or anything. They should go straight out. Boom. Then no problems. Real world, this LB2 is helping our dryer actually work properly, will keep the vent clear by blowing the lent from the vent with little clogging, and is certified for gas dryers, so we may switch to that in the future. The install took 8-10 hours, including electrical work, spread out over 3 days. But I’m a DIYer and I’m not that smart. Fortunately, I have a little common sense. I’d buy it again and would recommend. But deck the area of the attic first if you can.

Installed the duck fan for my dryer and it was an incredible improvement in drying time and efficiency. Cut my time in half. Unfortunately I have been getting a red flashing malfunction light only 2 weeks after installation every time I use it. And the fan no longer automatically turns off when the dryer stops. Just keeps going. I have to go into the attic and unplug it. Now the red light flashes while it's even drying. And the green light which says everything is okay stays eliminated. I sent an email to the company and they did not respond. Very disappointed that it is malfunctioning within 2 weeks after installation

My new home here in Texas was constructed by Ashton Woods, a very large corporation. After moving in, my brand new LG dryer started taking longer and longer to dry a load of clothes. This state of affairs worsened over time until a warning light came on alerting me that the dryer was not venting properly. We discovered that the dryer vent (mounted on our very steep roof) had become totally clogged. The builder vent itself was small and cheaply made. It had a mesh screen over the vent opening in violation of the building code which prohibits mesh because it jams up with lint and becomes a fire hazard. After researching the best solution to this problem, I found an excellent dryer vent made by Dryerjack in Florida - terrific product that has a damper that opens when the dryer is blowing exhaust but closes completely when the dryer is not in use - no metal mesh and no way for it to clog up. My research also led me to the Tjernlund LB2 dryer duct booster. I was impressed with what appeared to be its old fashioned solid build and design. I considered its cost of $310.00 expensive but if it kept my dryer duct free of lint and thus preventing a fire, that its cost was reasonable. Opening the box you immediately are impressed with the quality of this unit -- solid as a T51 tank. My very skilled contractor installed it in my attic. It worked great - first load of laundry dried in shorter time than usual. However, the following day, the Tjernlund began cycling on when no laundry was being done --- no one using the dryer. Turned out that high wind coming into the garage when the door was open caused the problem, and over time, the problem went away. Technical support for this issue was very good. Update March 12, 2017: After many weeks of use, I can say that this dryer blower is excellent (though somewhat expensive). Before installing this dryer blower, the dryer lint screen was always filled with lint. Additional, there was always a significant accumulation of lint inside the slot where the lint screen is housed. The Tjernlund, however, is so effective at pulling the airborne lint up into the exhaust duct and out of the house, that the amount of lint on the lint screen after drying a load of towels for example is reduced 75-80%. Instead of a thick coating of lint on the screen, there is just a minor amount. As for lint accumulation in the slot where the lint screen is housed in the dryer, the Tjernlund has completely eliminated lint there. The blower is so powerful and effective that lint is whisked up the exhaust pipe and out the house before it can accumulate in the dryer and on the lint screen. Additionally, there is a significant reduction in the time it takes to dry a load of clothes reducing our electric bill. Finally, the dryer itself is now allowed to work at peak efficiency and will obviously have a longer working life. I feel that the Tjerlund has eliminated the danger of dryer/lint originated house fire, that it is worth the cost thus five stars.

After moving into my new home, I noticed that my Electrolux dryer was taking an unusually long time to dry clothes. The heating element even burned out twice within a couple of years. Since my current Electrolux washer and dryer set was aging and showing signs of wear, I decided to replace them with a high-end LG washer and dryer. However, with my new LG dryer, I started encountering D80 and D90 errors. These errors simply indicate that 80% to 90% of the airflow within the dryer is restricted. I began researching the potential cause of this issue. As the home was relatively new, I decided to check the dryer vent. To my surprise, there was a shocking amount of lint buildup after such a short period of time. It became clear that the dryer was not venting properly. I discovered that the dryer vent, mounted on the roof, had become clogged. The way the builder had installed the vent created excessive bends, which caused lint to build up rapidly. After exploring various solutions, I opted for the Tjernlund LB2 Dryer Duct Booster. It is a well-made and thoughtfully designed product. The fan blade design and application are designed to minimize the need for frequent cleaning. While it's not the cheapest option, it effectively prevents lint buildup in the dryer duct, eliminating heating element burnout and error codes. The initial unit I received had a seized motor, a common occurrence in these types of products. However, it was promptly replaced, and the new unit has been working flawlessly. I installed it in the attic, and it has successfully eliminated error codes and significantly reduced drying times. If you're comfortable with DIY projects, installing the Tjernlund LB2 Dryer Duct Booster is relatively straightforward. Just be sure to carefully read and follow the instructions. Investing in this product will surely be worthwhile. Would have been 5 stars if the 1st motor wasn't frozen out of the box.

We moved into a new home; as soon as we moved, we started seeing a code on our dryer indicating that either the dryer exhaust run was too long or we had lint buildup. The run was about 30 feet total; but, effective distance was 40 feet with two 90 degree turns. We started by cleaning out the exhaust pipe; we removed about a five gallon bucket full of lint from the previous owners. Unfortunately, after removing the lint, we were still getting the code; so, we purchased both the Tjerlund fan and the lint trap. We installed both and immediately had an error message (blinking red light) indicating that there was heat buildup. That didn't make sense since our line had been cold for several days and didn't run long enough to buildup any heat before the fault came up. I called the support line on a Sunday (when they weren't open) and left a message. We didn't hear back; so, I called several days later. On my second call, I reached a very friendly technician on the line. He clearly had access to a knowledge base and went through different scenarios that might be causing my issue. After some time spent diagnosing on the phone, we identified that the issue was with one wire on the fan unit; that wire didn't have the insulation stripped back enough. A quick adjustment and everything was working as expected. We are now about two weeks into owning this successfully installed. Sometimes, when the dryer is running late at night and the house is quiet, you can hear it kicking in; but, it's generally pretty quiet. We have 6 people living in our house; so, our dryer is running a ton. Just two weeks in, we already had to clean out the newly-added inline lint trap (already was getting the code on our dryer again); so, that shows you how much lint really gets by the lint trap in the dryer. It's nice to know we can clean this simple lint trap regularly and, hopefully, not have to worry about much lint clogging our system or even having to run through this fan. Ideally, it would have been great to have the fan fully-functional from day one and not have to call support; but, the technician was very helpful. I could tell he really cared about making sure this worked. Had the diagnostics not addressed the issue, he didn't have any problem with me returning to amazon, especially within the first thirty days. My advice to folks purchasing this product: - Don't buy unless you plan to install relatively-quickly. I would not want to take a chance on owning it a while and then have to try returning it outside the 30-day window. - Make sure you look at your existing dryer exhaust line to think through how you might need to install and also review the technical installation guide. There are very-specific rules about where to install this in the line (distance to the fan with or without an added lint trap, distance from end of line, distance from 90-degree turns). You want to make sure you can install this in your home before you purchase and also think through how you might hang it in that specific location. I had to build a frame out of 2x4s and hang the fan from that to support the fan in the ideal location. - You are NOT supposed to buy this if your effective distance is less than 30 feet (total distance of the pipe + 5 feet for each 90-degree turn). Do that math before you buy or you may end up not being able to use the fan. It's one of the first questions the technician asked me. - Just buy the extra lint trap. It works and is nice to have. I'm sure this will prevent me from having to clean the exhaust line as often and will preserve the life of the fan. - Consider installing on a weekday so you can easily reach customer support in case you have an issue. - Plan your installation appropriately if you need your dryer often and especially if you install on a weekend when their support desk is closed. We run our dryer multiple times every day. When we installed this and the fan didn't work, we were SOL until it worked again. I had to remove the fan and then try to reconnect the exhaust duct again...not easy when you've adjusted the entire exhaust line to now fit an offset fan (vs. inline). You have to have extra ductwork and foil-based duct tape on hand to make all the adjustments and also be prepared to adjust everything back if there is an issue (or not have a functional dryer until it works). If you follow the advice above, I suspect the fan works for the majority of the installs; I'm just suggesting you be prepared in case it doesn't.

After researching dryer booster fans I decided on this one and I’m so glad I did! It’s a well made product and it is fairly simple to install (I have worked in construction for 20 years). I used it in our manufactured home that is pit set and I had to run the dryer duct up the interior wall and over to an exterior wall to vent properly. It was harder to re-route my duct work in a 2x3 wall than it was to install the booster fan and get it operating properly. Only snafu we have is somehow the sticker for the faceplate was thrown away in the midst of our project. Not a manufacturer problem, I didn’t pay attention to what I was throwing away. The fan has been being used for the past 5 weeks and my wife loves it because she says the dryer is drying clothes faster than it did without the booster in our old house. I highly recommend this product!