Exhibit 32.1
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 President and Chief Executive Officer of BTU International, Inc. (the “Company”), does hereby certify that to his knowledge:
| 1. | the Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2007 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and |
| 2. | 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/ Paul J. van der Wansem |
| Paul J. van der Wansem |
President, Chief Executive Officer and Chairman of the Board of Directors (principal executive officer) |
Dated: November 9, 2007