8″ to Dual 6″ Y-Splitter

Description

8 inch to dual 6 inch Y-splitter — two machines, one exit

The duct y splitter 8 to 2×6 is the fitting for the constraint most home and small-shop miners actually face: two machines, one hole. Rented space, a finished basement, a garage with exactly one window that faces the right way — whatever the reason, a second penetration is off the table and both machines still have to vent. This wye merges two 6-inch machine lines into one 8-inch trunk that leaves through a single opening.

It is 336 mm long, and the length is the design. A wye that merges two 6-inch streams needs real distance for the branches to converge at a shallow angle; compress it and it stops being a wye and becomes a tee, which is the shape that costs pressure and makes noise.

One of the largest single-piece parts in the line, printed as one continuous body with no seam at the junction.

What it fits

Standard 8-inch duct on the trunk collar, standard 6-inch on both branch collars, rigid or flexible throughout. Every 6-inch shroud and silencer in the line connects straight to a branch — including the Antminer S19 / S21 Dual 120 mm to 6″ Duct Shroud and the 6″ expansion-chamber shroud silencer. The trunk takes any 8-inch duct, coupler, elbow or port.

For smaller branches — a power supply, an auxiliary fan — the part you want is the 6″ to Dual 4″ Y-Splitter. If you have the option of a second wall penetration, take it: separate runs behave better than any shared one.

How it is used

As a collector, two 6-inch machine exhausts converge into one 8-inch trunk and out through a single 8″ window port. As a splitter, one large exhaust divides between two destinations — a workshop that wants the heat, and an outside vent that takes it once the workshop is warm enough. Clamp all three collars, and hang the fitting properly: at 336 mm with two loaded branches it needs its own support rather than relying on the ducts either side.

Why the length is the feature

Merging air is about heading, not just area. Two streams arriving on nearly parallel paths join with very little argument; two streams arriving across each other trade momentum, shed turbulence, and push back down both branches. Getting a shallow convergence out of two 6-inch bores requires length, and this part spends it. That is also why it is physically large: the size is not packaging, it is the geometry doing its job.

Be clear-eyed about what a shared trunk does. Two machines on one line are aerodynamically coupled: the set of fans producing more pressure will dominate the trunk and push back against the other. It works, people run it, and it is the right answer when the building leaves no alternative — but a separate run per machine is the layout that behaves predictably.

• Merges two 6-inch machine lines into one 8-inch trunk across 336 mm of convergence
• Puts two machines through one wall penetration in rented or finished space
• Runs backwards to divide one exhaust between two destinations
• Mates every 6-inch shroud and silencer in the line directly on the branches
• Prints as one continuous body, with no glued seam at the junction

Specifications

Open source — the biggest drawing in the line, given away

This is the part that took D-Central Technologies the most work to draw, and it is published on the same terms as everything else we design: open source under CC BY-SA 4.0 at the 3D models download center, free to download, modify, remix, print and sell. Its card is the 8″ to dual 6″ wye model. If your two branches want to leave at different angles than ours do, edit the file.

Everything you need is in y_split_8_to_2x6.zip — the STL, the CC BY-SA 4.0 licence, and the installation and safety guide. What this listing sells is the finished wye, made to order in PETG and shipped from Montreal, Quebec, in black or in orange; it is a big part and a long build, which is a large share of why people buy it rather than make one. The file is free permanently, and buying the wye or giving at D-Central’s fund page is what pays for the next design.

Works with

• 6″ to Dual 4″ Y-Splitter
• 8″ Window Exhaust Port
• 8″ Duct Coupler
• 8″ 45° Duct Elbow
• Antminer S19 / S21 Dual 120 mm to 6″ Duct Shroud

Two shrouds, one trunk, one wall — every fitting from the same drawing set. See the D-Central shroud and ducting system.

Frequently asked questions