SCHOFIELD, Wis. — Greenheck’s HBT-221 rectangular bubble-tight damper is now available in larger sizes up to 48 by 52 inches in a single section. This allows larger openings to be filled with one ...
Description: Greenheck’s HBT-221 rectangular bubble-tight damper is now available in larger sizes up to 48x52 inches in a single section. This allows larger openings to be filled with one ...