Page 283 - FanPedia - By Twin City Fan and Blower

FAN-PEDIA

Published by TECHNICAL DESCRIPTIONS
Twin City Fan & Blower

©2017 TCF.COM

INLET BOX – INTEGRAL (ATTACHED) INLET BOX
Inlet boxes are used when the installation does not allow for a straight run of duct into the fan. The
inlet box is designed to minimize the system effect of a 90 degree turn into the fan. Attached inlet

boxes are integrated into the inlet side of the fan housing. The Inlet box is supported by the fan.

INLET BOX – DETACHED INLET BOX (BOLT ON)
Inlet boxes are used when the installation does not allow for a straight run of duct into the fan. The
inlet box is designed to minimize the system effect of a 90 degree turn into the fan. The Bolt On

design is bolted directly to the inlet flange of the fan.

INLET BOX – DETACHED INLET BOX (FREE STANDING)
This is the same concept as the detached inlet box except it can be mounted separate from the fan
and is fully supported at the floor.

Inlet/Outlet Flex Connectors (Round and Rectangular)
Flex connectors reduce vibration transmission to/from connecting ductwork and allow for some
misalignment in the installation. Flex connectors are required on all isolated fans and can be
provided by TCF or the customer. Flex connectors are shipped loose for field mounting.

Inlet Silencer (with Support Leg)
Constructed of welded steel with acoustical absorption material to reduce noise emanating from fan
inlet. Flanged connection is suggested for mounting to the inlet of the fan. The opposite end of the
silencer can be furnished with an inlet venturi, inlet flange, or inlet pipe assembly. Unless otherwise
specified, the silencer will be furnished with flanges (punched) at both ends.

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