Speech Guard System Technical Data Sheet
Speech Guard G2 Plenum Return Silencer Sheet ID – 1133.3538.2019
Speech Guard is installed within the ceiling plenum, as open return grills provide a significant pathway for speech to escape from private offices and meeting rooms to be heard in neighboring spaces. This installation additionally reduces any noise from the plenum entering the office via this pathway.
Benefits: This product is part of the Speech Guard System that blocks the audibility of crosstalk that normally happens with drop tile ceiling systems. This system eliminates sounds associated with distraction and reduced productivity. Durable toughness provides increased resistance to damage that can occur from shipping, handling, installation and servicing. If cleaning is necessary, the surface may be cleaned using standard industry-recognized dry methods.
Composition and Materials: The Plenum Silencer has a Mat-Faced Finish, produced with a core of strong glass fibers and bonded with a thermosetting resin. The air stream side of the air flow duct features a black fiber glass mat, with a fire-resistant foil scrim on the exterior, extending the full width of the chute.
Application Examples: Speech Privacy and Noise Reduction in office buildings, conference rooms, HR departments, Legal departments and medical facilities.
Speech Guard G2 Plenum Return Silencer
Sizes available for the following standard ceilings:
2×2 or 2×4 ceiling grid systems
Color – Black
Hood Size – 31”w x 9”h x 1”t
Chute Size – 18” high oa, trimmed – 14” oa
Mat Size – 24”w x 24”w x ½”t
Fire Classification: Class A, Testing Method
Mat-Faced air flow meets the Surface Burning Characteristics and Limited Combustibility of the following standards:
ASTM E84 (UL 723), NFPA 90A and 90B, Canada: CAN/ULC S102-M88
Maximum Flame Spread Index: 25
Maximum Smoke Development: 50
Operating Temperature (max.) – ASTM C411 250° (121° C)
Air velocity (max.) – ASTM C1071 5000 fpm (25.4 m/sec)
Internal Pressure (max.) – UL 181 2° w.c. (498 Pa)
Fungi resistance – ASTM C1338 Does not breed or promote
Fungi resistance – ASTM G21 No growth
Bacteria resistance – ASTM G22 No growth
Water vapor transmission – ASTM E96 < 0.02 Perms
Water vapor solutions – ASTM C1104 < %5 by weight