X0101 EFFECT 33 LIVE 2013-07-03 09:00:00

S-4

0001216596 NORTEK INC 333-189181 0001577421 2GIG Technologies, Inc. 333-189181-31 0001525187 Barcom Asia Holdings, LLC 333-189181-30 0001525188 Barcom China Holdings, LLC 333-189181-29 0001349885 Core Brands, LLC 333-189181-28 0001399563 LT Sale Co., Inc. 333-189181-27 0001302994 Broan-Mexico Holdings, Inc. 333-189181-26 0001302808 Broan-NuTone LLC 333-189181-25 0001303020 Broan-NuTone Storage Solutions LP 333-189181-24 0001302876 CES Group, LLC 333-189181-23 0001303002 CES International, Ltd. 333-189181-22 0001399572 CLPK, LLC 333-189181-21 0001525185 Ergotron, Inc. 333-189181-20 0001349883 Gates That Open, LLC 333-189181-19 0001399564 Gefen, LLC 333-189181-18 0001302907 Governair LLC 333-189181-17 0001399570 Huntair, Inc. 333-189181-16 0001399568 Huntair Middle East Holdings, Inc. 333-189181-15 0001302995 Linear LLC 333-189181-14 0001399560 Magenta Research Ltd. 333-189181-13 0001303071 Mammoth, Inc. 333-189181-12 0001349884 NORDYNE International, Inc. 333-189181-11 0001303073 Nordyne LLC 333-189181-10 0001349889 Nortek International, Inc. 333-189181-09 0000073373 NUTONE LLC 333-189181-08 0001303082 Operator Specialty Company, Inc. 333-189181-07 0001399573 Pacific Zephyr Range Hood, Inc. 333-189181-06 0001303019 Rangaire GP, inc. 333-189181-05 0001303021 Rangaire LP, Inc. 333-189181-04 0001303083 Temtrol, LLC 333-189181-03 0001525186 TV One Broadcast Sales Corp 333-189181-02 0001399576 Zephyr Ventilation, LLC 333-189181-01