Overhead electrical distribution lines are traditionally constructed with bare aluminum or copper conductors energized at thousands of volts. This presents a danger to people and wildlife from ...
SMACNA has released its new edition of the Fire, Smoke, and Radiation Damper Installation Guide for HVAC Systems. The sixth edition features a slew of new information regarding damper installations ...
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 ...
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