Product review (5 stars): Wow! Cuts more than 50% off the drying time
Our dryer duct vent runs from about 30 feet (including two 90 degree bends). It used to take our electric dryer about 100-120 minutes to dry a full load, while a half-load took around 1 hour. I just installed this dryer booster last night and tested it this morning. With the dryer heat set on medium, it took 20-25 minutes to dry a half-load. That's a terrific decrease in energy consumption that will pay for the booster within 2 years. With the added bonus of saving time.

It was fairly simple to install. I chose to use DryerFlex semi-rigid transition duct, and run the dryer exhaust through a secondary lint trap (Fantech). It also seemed a good opportunity to use stainless steel duct clamps.

For this installation, I needed longer rigid tubing (~6 feet) for the pressure switch. This tubing has to have a 1/4 inch outer diameter. 1/4-inch OD polyethylene ice maker tubing, available from Lowes/HomeDepot/Amazon is cheap (<$3 for 25 feet), and works great.

One last suggestion. I calibrated the pressure switch while running the dryer on the "Fluff/Air" cycle. This morning, the Dryer Booster cut in and out when I had an actual load in the dryer, and I had to re-calibrate it. It might save you time to do the initial calibration with a load in the dryer.