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Exhibit 31.1
 CERTIFICATION AS ADOPTED PURSUANT TO
SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
  1.
    
    I have reviewed the Annual Report on Form 10-K of Aavid Thermal Technologies, Inc.2.
    
    Based on my knowledge, this annual report does not contain any untrue statement of a
material fact or omit to state a material fact necessary to make the statements made, in
light of the circumstances under which such statements were made, not misleading with
respect to the period covered by this annual report;3.
    
    Based on my knowledge, the financial statements, and other financial information
included in this annual report, fairly present in all material respects the financial
condition, results of operation and cash flows of the registrant as of, and for, the
periods presented in this annual report;4.
    
    The registrants other certifying officers and I are responsible for establishing and
maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-5(f)
and 15d-5(f) for the registrant and have:
 a.)
    
    designed such disclosure controls and procedures, or caused such disclosure
controls and procedures to be designed under our supervision, to ensure that material
information relating to the registrant, including its consolidated subsidiaries, is made
known to us by others within those entities, particularly during the period in which this
annual report is prepared;b.)
    
    evaluated the effectiveness of the registrants disclosure controls and procedures
and presented in this report our conclusions about the effectiveness of the disclosure
controls and procedures, as of the end of the period covered by this report based on such
evaluation; andc.)
    
    disclosed in this report any change in the registrants internal control over
financial reporting that occurred during the registrants fourth fiscal quarter that has
materially affected, or is reasonably likely to materially affect, the registrants
internal control over financial reporting; and
 5.
    
    The registrants other certifying officers and I have disclosed, based on our most
recent evaluation, to the registrants auditors and the audit committee of the registrants
Board of Directors (or persons performing equivalent functions):
 a.)
    
    all significant deficiencies and material weaknesses in the design or operation of
internal control over financial reporting which are reasonably likely to adversely affect
the registrants ability to record, process, summarize and report financial information;
andb.)
    
    any fraud, whether or not material, that involves management or other employees who
have a significant role in the registrants internal controls; and
 6.
    
    The registrants other certifying officers and I have indicated in this annual report
whether there were significant changes in internal controls or other factors that could
significantly affect internal controls subsequent to the date of our most recent
evaluation, including any corrective actions with regard to significant deficiencies and
material weaknesses.
  /s/ Bharatan R. PatelBharatan R. PatelChairman, President and Chief Executive Officer