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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18
*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches
For evaporative coolers or central blower systems
103 - three way
T-Bar Modular Core Diffuser with Round Collar 18-20
Designed for return applications and as a vented access door to equipment
4" Horizontal/Vertical Mount Fire Damper 2634-44X12 Step Down Ceiling Diffuser *Note: Ceramic fiber blade insulationh3. Standard Features * 2633 Square or rectangular out of airstream fire damper for vertical mount only. * 2634 Square or rectangular Spring actuated (6) out of airstream fire damper for horizontal or vertical mount. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Maximum dimension 60w, 52h * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion
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