Product Overview

LB2 Dryer Duct Booster for Residential
Electric and Gas Clothes Dryers
Meets UL 705 DEDPV Requirements / Complies with IRC-2015
2
Designed to provide years of reliable performance
Rubber isolated
mounting bracket
eliminates vibration
transfer. Rotates
360º to accommo-
date any mounting
orientation.
3”deep dryer duct
connections for easy
duct attachment.
Redundant
High Limit
Pressure Sensor Thermister
Micro-Controller
PSC
permanently
lubricated ball bearing
motor is not exposed to
heat, lint or moisture.
Uses less power than a 50
watt light bulb.
Install and plug-in. Pressure and tempera-
ture sensors self calibrate to automati-
cally sync the Booster Fan operation with
your clothes dryer operation.
Status Panel confirms proper Booster Fan
operation while the dryer is running and
alerts user to duct blockage, fan failure
and excessive exhaust temperatures. The
Booster Fan will deactivate if excessive
temperatures are detected.
On-board multi-functional control
Typical Laundry Room Installation Typical Closet Installation
佡 Duct lengths are commonly stated in equivalent
feet. Most residential clothes dryers are rated for
a maximum exhaust duct length of 25 equivalent
feet. At 25 equivalent feet or less the dryer’s
blower can maintain a proper exhaust velocity to
efficiently dry the load of clothing and exhaust lint
to the outdoors.
佡 With 4 inch duct, 90 degree elbows are equivalent
to 5 feet of straight duct resistance. Three elbows
and 10 feet of straight duct are equal to the 25
equivalent foot limit, so it is very easy to exceed
the maximum duct length.
佡 Elbows connected to elbows chokes exhaust flow.
佡 Gravity fights moist, lint-laden exhaust in
vertically run, roof terminated ducts.
Give your dryer duct a boost by
adding a Tjernlund LB2
佡 Reduce lint build-up and duct cleaning.
佡 Save energy, reduce drying times by up to 50% .
佡 Boost exhaust velocity in ducts up to 150
equivalent feet long.