0000899140-98-000335 SC 13G 1 19980810 NASD AAVID THERMAL TECHNOLOGIES INC 0001003481 3679 020466826 DE 1231 SC 13G 34 005-49563 98680773 ONE KOOL PATH LACONIA NH 03247 6035283400 P O BOX 400 LACONIA NH 03247-0400 WARBURG PINCUS ASSET MANAGEMENT INC 0000032835 013267350 0531 SC 13G 466 LEXINGTON AVE 10TH FLOOR NEW YORK NY 10017 2125930300 466 LEXINGTON AVE NEW YORK NY 10017-3147 WARBURG PINCUS COUNSELLORS INC 19920929 EMW COUNSELLORS INC 19600201 SC 13G 1 000089914098000335-001-seq1-sc-13g.txt INITIAL SCHEDULE 13G FILING