The line set rough-in box
Lineset Box™
The exterior wall termination for the line set, condensation drain and low voltage wire. One molded piece, white or black, set at rough-in before the siding goes on.
Why it exists
The things that happen between rough-in and start-up
Up close
What you are installing
- Mounting flange12.16 by 7.18 inch flange with eight pre-drilled holes. It laps the cut edge of the sheathing and takes eight 3/4 inch deck screws.
- Open cavityOne open cavity, 10.63 by 5.65 inch, carries the line set, the condensation drain and the low voltage control wire through the wall.
- One piece moldingMolded in one piece from polypropylene. No assembly, no separate faceplate, nothing on the wall that can work loose.
- Made in the USAMade in the USA from UL-recognized polypropylene, UL 94 HB, UL File E130336. One clean termination point, easy install.
- Tapered backThe body tapers toward the back to clear the wall cavity, and sits 3.60 inch deep behind the flange.
Install
Four steps at rough-in
1. Cut the opening
Cut a 5-3/4 x 10-3/4 in rough opening in the wall sheathing during rough-in, before siding or exterior finish.
2. Set the box
Drop the box into the opening and seat the flange flat against the sheathing. The tapered back clears the wall cavity.
3. Fasten the flange
Drive eight 3/4 in galvanized deck screws or equal through the pre-drilled holes into the sheathing and framing. Screws not included.
4. Tape and run your lines
Seal the flange with flashing tape. Hole-saw the top for the line set and drain, then run the line set, drain and low voltage wire.
Specifications
Know before you cut
| Rough opening | 5-3/4 x 10-3/4 in, cut in the wall sheathing |
|---|---|
| Mounting flange | 12.16 x 7.18 in, 8 pre-drilled 1/8 in holes |
| Body through the wall | 10.63 x 5.65 in, 3.60 in deep behind the flange |
| Fasteners | 8 x 3/4 in galvanized deck screws or equal, not included |
| Carries | Line set, condensation drain and low voltage wire |
| Line set pass-through | Hole-saw on site: 1-7/8 in for a 7/8 x 3/8 line set |
| Drain pass-through | Hole-saw on site: 1 in for 3/4 in Schedule 40 PVC |
| When to install | During rough-in, before siding or exterior finish |
| Colors | White or black, same box |
| Made in | USA |
| Material | UL-recognized polypropylene, UL 94 HB, UL File E130336 |
| Weight | 10.45 oz |
| Patent | Patent pending |
FAQ
Common questions
What size rough opening do I cut?
Cut a 10-3/4 x 5-3/4 in opening in the sheathing during rough-in, before siding goes on. The body is 10.63 x 5.65 in and sits 3.60 in behind the flange, so it clears a 2x4 wall.
Does it have knockouts?
No. Hole-saw the top of the box on site to fit the job: 1-7/8 in for a 7/8 x 3/8 line set, 1 in for a 3/4 in PVC condensation drain. Seal every hole with silicone.
What comes in the box?
The box only. It takes eight 3/4 in galvanized deck screws or equal through the pre-drilled flange holes, and flashing tape to seal the flange. Neither is included.
Can I use it on a mini split job?
Yes, on the outside wall, for the line set, drain and low voltage wire. If you need the rough-in box inside the wall behind the head unit, that is our Star Box.
Who makes the Lineset Box?
J.T. Products LLC, an HVAC hardware company in Warwick, New York, in business since 1999. Invented by John Tomaini after 40+ years contracting. Made in the USA from UL-recognized polypropylene, UL 94 HB.
