Overall I would say this is a good product and worth the investment. It was easy to install for the most part. It does take some work to run power to the unit as well as connect the ducts. My main issue with the product, and the reason for only 4 stars, is that sometimes it gets stuck on and will run for hours until I flip the switch to shut it off. I connected it to a light switch near my crawl space entrance so I can shut it off via the switch. I am thinking about connecting that to a 3 way switch so I don't have to go into the crawl space every time I need to shut it off. I have had it happen twice. Not sure why it does this, but it does. But again, our clothes dry much quicker than before so it is worth the hassle for us. Definitely moves a lot of air. I am almost worried that it pulls too much air out of the dryer so it can't get as hot. The clothes don't feel hot when I open the drier, yet the clothes are dry so no worries I suppose.

the dryer duct from the previous owner was a flexible aluminum foil tube that had been snaked around numerous corners and bends. Installed actual vents and this dryer booster. Experience over the past month has been excellent. Comes on about a minute after the dryer starts and turns off a minute after. Seems to have shaved some drying time. I was a little nervous about the inline boosters and how effective they would be. This product seems like a hearty/beefy and high-quality solution. Installation was not difficult.

A few years ago I was shopping for a dryer booster fan and it came down to the Tjernlund and the Suncourt Centrasense. I ended up going with the Suncourt because it was less expensive, and I liked the fact that the sensor that starts the booster fan clips onto the 220 volt leads in the electric dryer and determines when the current is flowing and switches on and off within 15 seconds of the dryer starting and stopping. Read a lot of reviews that the Tjernlund's pressure sensing switch is finicky and error prone. HOWEVER, I went through 3 Suncourt's in 4 years! The fan blades were plastic and glued in, and inevitably they failed after 11 or 12 months. The company was great about honoring the warranty, but the 3rd unit they sent me was a refurbished one and was noisy from the start, and broke about 7 months in. I gave up on that brand, and decided to bite the bullet and pay the premium price for the Tjernlund. The install was basic, but could have used much clearer illustrations, and the written instructions seemed to be translated from another language. I was careful to check that the pressure sensor tube was not kinked or anything before installing. The calibration worked quickly, and the first couple of tests it ran smoothly, but on first load of actual laundry the fan did not shut off for about 3 minutes after the dryer stopped. The next couple of loads worked a little better, but I will be keeping a close eye on it, as I don't need the fan running for hours and overheating. Pros - fairly easy to install, and very quiet yet powerful. It is quieter than any of the Suncourt Centrasense fans we used. The lint handling advertised seems great. Cons - the sensor. Hope it works for the long run, and will shut off in less than 3 minutes after the dryer finishes.

Love the product, have a 35 foot run of dryer duct - checked the motor after a year, no lint at all. Nice side-effect, it also makes it much easier to access your dryer duct from the attic for cleaning. Really great product, worth the premium.

We have a very long dryer run, close to 35 feet 2 90 degree elbows, we were getting allot of lint below the drum and in the dryer vent. A technician came out because we were having an issue with the dryer not performing very well, he asked a few questions like what length is the dryer vent pipe? How many 90's / elbows are in the run? What is the vent pipe length allowed for your dryer? and a couple others. In my ignorance and probably from not reading the dryer manual I discovered that our vent run was too long and that was before accounting for the 90's. After doing some research I chose the Tjernlund duct booster because of the offset motor and reviews compared to the other booster motors. This was not an easy install (at least for me, and I am pretty handy) being in a cramped area of the attic and having to mount the unit inline with the pipe (which is at an upward angle and thru fire-break walls in the attic) was not the simplest thing to do. The 3/8" mounting nuts were not supplied with the unit (no biggie) so at first I used aluminum heat tape to mount everything then straps to secure in place, then went back and securely mounted using 2x4's and the mounting bracket. Running the indicator panel was also a pain as I had to run from attic down, had to go through multiple 2x4' stacked as it is a wall and had nails in it.... finally was able to get a long enough drill bit thru and snake the cable to eventually connect to panel. Fired the unit up and got the correct blinking lights. Has worked great, you can hear it if you listen for it, not so much when the dryer is running but it runs for about a minute (or two) after the dryer shuts off you can hear a little hum, not bad at all. Speed Queen Gas Dryer DF7000 Series I do not have an inline dryer lint trap. 4" duct mix of solid duct and flexible in the run.

I was lucky and had an easy access install. It took about 3 hours with minor reconfiguring of the vent duct. The laundry lady tells me dry time is about 30 faster. Which means 30 energy savings and less wear on the dryer. It is a little pricey but a worthwhile upgrade.

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.

This system is amazing. Installing on this fan is super easy. Cut drying time less than half. This thing is incredible, and looks pretty cool.

The unit was well designed too handle dryer lint and keep it moving through the ducts. It had all the right features for the job.It had a remote panel to monitor operation of the booster right at the dryer. This saves trips to the arctic to check on the booster.

One of the differentiators (aside of this unit not clogging) was the fact it is able to self-calibrate, thus precisely reacting to change in the air pressure and temperature change when the dryer is on.A high quality product built for ages. Not a flimsy popular alternative. The cost is justifies.

Are used to take several cycles to dry the clothes. Now they dry before the washer is done. Wish I had installed this couple years ago when I saw it.

Easy to install, works like a charm and is a perfect solution!

What I asked for

Our dryer vent is rigid well sealed metal and goes straight up 20' with 1, 90deg and 1, 45deg bend.We were consistently having issues with drying clothes and often getting 'smart' emails from our Lg dryer that the vent was obstructed (it was completely clear). This was after we replaced our new Samsung set (which REALLY had a hard time drying clothes).So I installed this device. Options for install on our retrofit were limited and I had to mount it lower than I would have liked. Per the instructions it was still mounted the proper distance from the dryer but it sometimes stays on when the dryer is off and done. I think getting it as far away from the actual dryer as you can is key. I've put it on a smart switch so it can be turned off/on again easily without having to climb in the attic.Honestly it is saving us so much money and time that I'm not mad at it.

My home inspector and I selected this brand and we are very impressed. The over all quality of manufacturing is outstanding, the mounting bracket is top quality. My dry vent run is 46 ft. and this fan has improved the dry time on the dryer. It has increased the amount of lint that I am now getting in the vent inside my dryer and has over whelmed me with the amount of link I am now getting pushed to the outside vent at the end of my run.... My home inspector is so impressed that he is going to recommend the product on all of his future inspections.

Really improved my electric dryer drying time. I was at the break even pt between really needed it (as the distance was right at the over-under length), but it really pushed the air through and I believe now thoroughly exhausts the dryer vent line. Overall, I am glad I bought the exhaust fan.

Just like any thermal hyrdro exchange using air as transport evacuation is key to efficiency.One cycle clothes dry.Remodel only let me have 1 option to ventUp and out long run lots of 90 degree turnsWOW this is THE way to go dryer does not struggle.With optional lint trap i doubt i will have plugged vent issues.Worth the moneySuper satisfied. Worthwhile. Purchase

LB2 Dryer BoosterIn my McMansion, the laundry room is pretty near the middle of the house, with the dryer vent duct heading straight up about 25 feet to the roof. Perhaps my dryer brand (LG) did not create the power to get the air out, but out cloths would never dry properly, take hours to dry, dry only on "bulky large" and have steam come out when the door was opened. We had an extended warranty with two visits from our service tech. New mother boards - no success. It took hours to dry any clothes, blankets, whatever. The "S" tube from the dryer to the wall would fill up with water - I suspected that this was NOT coming from the roof but collecting there as the dryer tried to push its hot / wet air out the roof. Speaking with neighbors who have the same model house, they stated that they had no issues.My wonderful wife would discuss this inefficient appliance every laundry day. I started to hang my cloths on the line outside. So I looked into dryer boosters - landing on the LB2. I loved the review that said it was expensive, weighed a ton and did a great job. I was careful with all my measurements for install. Fortunately the spot in the attic fell in a nice place, next to a vertical stud and a convenient "perch" for me to work. I assembled the pipe arrangement on the ground using 4" duct and fittings from my local Ace Hardware and Lowes (see photo). I built up 2 pieces of 2x4 bolted with lags and glued to the vertical stud.A key part of the LB2 is a thin air tube that controls the "start / stop" as it detects the dryer's airflow. My tube was "nipped" a bit on the pipe end. I cut off the bad part and reattached it. After install, plugging it in, it started just fine but I got a flashing red error code and the LB2 would not shut down. I called Bob at Tjernlund who helped me trouble shoot the problem. First he recommended I install a 4" backdraft preventer between the LB2 and the roof termination. A PVC backdraft preventer was installed but this did not solve the problem. The good news is that I could plug in the LB2 manually, have it run when we were drying out clothes. The bad news is that I had to climb a ladder into my attic every laundry day.Next Bob at Tjernlund recommended I look under the electronics access panel. Up in the attic, opened up the panel to see that the other side of that little air tube - It came "pinched" from the factory (see photo). I loosened the retaining bolt, and straightened the tube (see photo). It now works like a champ, automatically starting and stopping with the dryer. Recommendation: before installing in the attic, check both ends of the little tube - much easier on the ground than in the hot, dark, cramped attic. Hope this helps - I am open to questions. Knowing what I know now - I would purchase this again as our clothes are drying quickly now - one shot - dry. All the best.

Best dryer booster I have had. You must read and follow the directions to get a proper installation. The indicator light box is a nice feature. Gives peace of mind that everything is operating safely. Mounts on rubber bushings to reduce noise. Would definitely buy again.

Best dryer booster I have had. You must read and follow the directions to get a proper installation. The indicator light box is a nice feature. Gives peace of mind that everything is operating safely. Mounts on rubber bushings to reduce noise. Would definitely buy again.