EXHIBIT 3.39

                CERTIFICATE OF LIMITED PARTNERSHIP OF RANGAIRE LP

      This Certificate of Limited Partnership of Rangaire LP (the
"Partnership"), dated December 20, 1996, is being duly executed and filed by
Rangaire GP, Inc., as general partner, to form a limited partnership under the
Delaware Revised Uniform Limited Partnership Act.

      1. Name. The name of the limited partnership formed hereby is Rangaire LP.

      2. Registered Office. The address of the registered office of the
Partnership in the State of Delaware is c/o The Prentice-Hall Corporation
System, Inc., 1013 Centre Road, Wilmington, New Castle County, Delaware.

      3. Registered Agent. The name and address of the registered agent for
service of process on the Partnership in the State of Delaware is The
Prentice-Hall Corporation System, Inc., 1013 Centre Road, Wilmington, Delaware
19805.

      4. General Partner. The name and the business address of the general
partner of the Partnership is Rangaire GP, Inc. c/o Nortek, Inc., 50 Kennedy
Plaza, Providence, Rhode Island 02903.

      5. Effective Date. The effective date of this certificate shall be January
1, 1997.

      IN WITNESS WHEREOF, the undersigned has executed this Certificate of
Limited Partnership as of the date first-above written.

                                               RANGAIRE GP, INC.

                                               By:/s/ Richard J. Harris
                                                  ------------------------------
                                               Its:
                                                      Richard J. Harris