Tjernlund DBM4 Duct Booster Fan
The DBM4 Duct Booster Fan is the third Tjernlund product on this list, and for a good reason. It’s made of 24 gauge galvanized steel. This is a significant step up to the competition, as most companies don’t use the same grade of steel and they sometimes make the entire unit out of plastic.
With this model, you get an electronic connection box, riveted to the outside of the unit. The motor is nothing to scoff at, exerting 143 watts of power. It’s fairly powerful, and the whole system runs smoothly, but it can get a bit noisy.
As an axial fan, it’s bound to have some difficulty working under a high static pressure, which is why some units can get a bit noisy and cause plenty of vibrations. You can get a speed control unit to help limit the vibrations, which means more money out of your pocket.
The installation of this duct system is pretty simple, but the unit is a bit heavy. You might want to leave the installation to a professional handyman.
It comes with instructions to program the dryer booster fan to fit your specific needs – more moisture, more heat, you can set it up however you want. However, this model requires a lint trap to operate correctly, and you’ll have to buy it separately.
All in all, the DBM4 dryer exhaust booster fan is a powerful and reliable tool, but it can be a bit loud.
Pros and highlights
- Decent amount of power
- Gas compliant
- Easy to program
- Low power consumption
- Sturdy all-steel construction
Cons and potential flaws
- Requires lint trap
- Can get noisy and vibrate a lot
- You might need to get a separate speed control unit
- A bit pricey