EXHIBIT 32.2

                            CERTIFICATION PURSUANT TO
            SECTION 1350, CHAPTER 63 OF TITLE 18, UNITED STATES CODE,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to Section 1350, Chapter 63 of Title 18, United States Code, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned, as
Vice President, Corporate Controller and Chief Accounting Officer of BTU
International, Inc. (the "Company"), does hereby certify that to his knowledge:

      3)    the Company's Annual Report on Form 10-K for the year ended December
            31, 2005 (the "Report") fully complies with the requirements of
            Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

      4)    the information contained in the Report fairly presents, in all
            material respects, the financial condition and results of operations
            of the Company for the periods covered by the Report.

                                    /s/ Thomas P. Kealy
                                    -----------------------------
                                    Thomas P. Kealy
                                    Vice President, Corporate Controller
                                    and Chief Accounting Officer (principal
                                    financial and accounting officer)

Dated: March 30, 2006