Citing continued escalation in raw material costs, Hollingsworth & Vose announced 2-5% price increases for its High Efficiency & Specialty Filtration business, which serves HVAC, clean room, facemask, appliance, analytical and other markets. New prices for glass and synthetic filter media will be effective by February 1, 2011 or as contracts allow. The increase will vary by product, grade and region depending on material cost escalation.