8-Inch Flex Duct Window Vent Port

Description

Overview

The exit point for a full-size 8-inch flex run: a 248 mm square plate that mounts in a window insert panel, plywood or a wall penetration and presents a male collar that 8-inch flex duct slips straight over. It carries the same plate features as the rigid 8-inch window port — countersunk mounting holes, gasket groove, gussets and insect-screen retention — with the duct interface swapped for a flex collar.

It is not a drop-in equal of the rigid port: the through-bore is 196.4 mm rather than 204.0 mm — 7.3% less free area, the geometric price of a collar the flex core can slip over. If your run ends in rigid pipe, the rigid port keeps the larger opening.

What it fits

• 8-inch flex duct — slips over the male collar, clamps on the land below the bead.
• A window insert panel, plywood sheet or wall penetration, through the countersunk mounting holes.

Measure before you order. Fit dimensions in this line are derived from published fan and chassis geometry and are not yet validated against measured production hardware. Check your flange size and clearances against the footprint below. If something does not fit, tell us — that is how the next revision gets better.

How it is used

Cut the opening, seat the plate, screw it down through the countersunk holes with a seal in the gasket groove, then slip the 8-inch flex duct over the collar and clamp it on the land. It is the last part in the run — everything upstream of it stays serviceable from inside.

The plate carries an insect-screen rebate with retention tabs. Screen material is not supplied — cut a disc of screen to the bore plus about 7 mm and press it into the rebate behind the tabs.

There is no backdraft flap, and there cannot be one: a gravity flap needs a hinge pin or live hinge plus running clearance, and a single-piece part cannot hinge. When the miner is off, outside air can come back through the opening. If you need backdraft protection, fit a commercial inline backdraft damper in the duct run, or blank the run off when the machine is down.

Why it helps

• Ends a full-size 8-inch flex run at the wall without a rigid stub or improvised transition.
• Insect-screen retention built into the plate; the screen disc drops in behind tabs.
• Same plate hardware as the rigid 8-inch port — countersinks, gasket groove, gussets.
• Honest numbers: 196.4 mm through-bore, 7.3% less free area than the rigid 8-inch port.

Specifications

Open source

This design is open source under CC BY-SA 4.0. The files are free to download at /3d-models/, and anyone may print, modify or sell them — that is the point. Buying a finished part from us is one way to support the work; the fund is another.

Works with

Pairs naturally with the rest of the 8-inch line:

• 8-Inch Window Vent Port (rigid — larger through-bore)
• 8-Inch Flex Duct Adapter
• Antminer S19/S21 Dual 120 mm to 8-Inch Shroud

See the full D-Central shroud and ducting system.

Frequently asked questions