Tjernlund LT4 Lint Trap for DEDPV Dryer Booster Fans

très bon article , très pratique pour intercepter la mousse que la sécheuse laisse passer.

This unit does an excellent job of collecting the large amount of lint that passes through the dryers internal lint screen. I would recommend using hvac (Not gray duct) tape to seal all seams inside and out as to prevent lint from catching on the sheet metal edges. The inlet and outlet are also the same diameter, so it is necessary to use a coupler when connecting the output side to rigid 4" tapered metal ducting. I also fabricated a bracket out of a piece of aluminum to secure it between wall studs rather than relying on the ducting itself to support the unit in the wall cavity. The unit seals well. It does get a bit warm to the touch when the dryer is running, but there is hot air passing through it, so that is to be expected. It never reaches a point where it cannot be touched though, and removing it while dryer is running is not the brightest idea anyway. When used in conjunction with a booster fan, this helps eliminate clogging and fire hazards due to lint buildup. I ran this unit without a booster for about 2 weeks before getting around to installing a booster and it had no adverse effects on dryer performance, and when I did open up the new ducting I installed after those two weeks, there was virtually no lint in the 4" rigid ducting over a 25 ft run. I am using this unit now in conjunction with a fantech booster installed approximately 8 ft after the trap unit. It does appear that the suction created by the booster is making the screen in the unit a bit more "flexible" than it was before the fan was installed, so time will tell if the screen holds up. Overall a great addition to control lint and protect from a potential fire.

This lint trap was required by Code (The inspector let us know early on) since we needed a booster exhaust fan (also Code required) because of the length of the duct. The first time we used it, we understood the reason for the Code requirement. There was a bunch of lint the dryer lint filter missed. I guess I shouldn't be surprised. My old house always had lint around the dryer vent outside. You certainly don't want all that lint plugging up your booster fan and having to try and clean it out. This was a good long-term investment. I'm not super impressed with the seal between the door and the wall, but the booster fan is probably creating a slight negative pressure. I see no signs of lint building up around the door (on the wall) The filter housing is very sturdy. It has a clean look on the wall too. I don't recall if we had to "crimp" the exhaust side to fit inside of the next length of pipe, but a stove pipe crimper works well. YouTube also has videos on how to do it with other tools.

This was the answer to the problem works great stopped the warnings on the dryer and dryer works only half the ti,me to dry the laundry thanks

Easy to mount, easy to clean