TjernlundLB2 No-Clog, Zero Maintenance DEDPV Dryer Duct Booster Fan with Automatic Activation

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.

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 begancycling 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.

Great dryer booster fan. Clothes are drying in half the time. However you have to pay close attention to the installation instructions. If you do then it will work nicely but it is really important to install it correctly

Lo compré ya que en la casa la instalación que tenía la casa para la salida del aire de la secadora baja por dentro de la pared (1 metro), continua por debajo del piso (2.5 metros) y se eleva unos 20 cm para salir al patio, son 4 codos pero al final de la tubería se reduce de 4" a 3", todo esto es más de lo recomendado para el largo de tubería y para secar la ropa tenía que hacer 3 ciclos completos. Desde que se instaló se ha reducido más de la mitad el tiempo de ciclo, en único detalle es que marca obstrucción en tubería relativamente seguido y hay que recalibrar, creo que es tema de la mala configuración de tubería que se tiene en la casa. Lo instale a nivel de piso para cumplir con la distancia entre secadora y el booster. Totalmente satisfecho

Fantastic product. Install time was around 2 hours for a non professional and it was easy. I was really impressed with the auto calibration and included status operation panel. The operation is automatic when dryer turns on and it runs fairly quiet. There is no vibration transferred to the joists. Spending the extra money was well worth it.

Awesome product. Had to buy the lint trap because of my setup. Reduced drying time by at least 30%. Pressure sensing system with indicator panel work great. The price is hard to swallow but I don't think the quality compares to anything else.

This is a great product