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Standard Features * 2501 -Square or rectangular for vertical mount only
Designer Color or Plated Metal Finish available on this product
Ceiling opening must be 4” larger in length and width than the nominal duct size
Designed to minimize vision into the air duct
Square to round transition collar
2" 3 Hour Vertical Mount Fire Door 2561-30X26 Step Down Ceiling Diffuser Standard Features * 2501 -Squareh3. Standard Features * 2561 Square or rectangular fire door for vertical mount only. Maximum dimension 48w, 49h. For damper free area chart A click here * 2563 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 48w, 41h. For damper free area chart B click here * 2565 Round fire door for vertical mount only. Available 4" thru 40" round. * UL and California State Fire Marshall approved * 2" thinline frame *
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