Plan central vacuum inlets by starting at the furthest corner of the house and placing each inlet where one 30 ft hose covers the most floor area, then repeating until every corner is reached with a few feet of slack. Most homes end up with one inlet per 600 to 1,000 sq ft, with the first inlet in a central hallway, one per large room, one for the stairs, a sweep inlet in the kitchen, and a utility valve in the garage. This page walks through the method and the trade-offs.
The furthest-corner method
Walk the house with a 30 ft hose or a 30 ft length of rope and work from the hardest spot inward. The steps:
- Find the furthest corner of the house from where the hallways meet. Stand there with the end of the rope.
- Walk the rope back toward the center of the house along the path a hose would actually take: around door frames, around the bed, not through walls. Where the rope runs out is the furthest point an inlet can be and still reach that corner. Mark the wall there, then slide the mark toward a spot that also covers the most other floor.
- From that inlet mark, sweep the rope through every room it can reach. Mark those rooms as covered.
- Go to the furthest uncovered corner and repeat.
- When every room is covered, walk every room again looking for the places the hose will snag: behind doors, around kitchen islands, up the full run of the stairs, under the dining table.
- Subtract 3 to 5 ft from the hose length for the wand and your reach, and confirm each inlet still covers its area with that margin.
Mark each final location on the floor plan with its height and the side of the stud it should sit on. That plan goes to the installer, or to you in the attic.
Hose length vs inlet count
Fewer inlets with a longer hose costs less to install; more inlets with a shorter hose is lighter to use every week. A 30 ft hose is the standard planning length because it balances reach against weight. A 35 ft hose saves an inlet or two in a large home, but it is heavier, takes more storage, and is more work to drag around furniture. Hoses longer than that are for specialty use. Plan on 30 ft; if a 35 ft hose is what you end up buying, the extra 5 ft is slack.
Retractable hose systems change the math because the hose lives in the wall and comes in 30 to 60 ft lengths, so one retractable inlet can cover far more floor than a standard one. See the retractable hose guide for what that does to the pipe.
| Approach | Inlets for a typical 2,000 sq ft two-story | Pros | Cons |
|---|---|---|---|
| 30 ft hose, standard inlets | 3 to 4 | Light hose, easy storage | More wall openings |
| 35 ft hose, standard inlets | 2 to 3 | Fewer inlets | Heavier hose, more to store |
| 50 ft retractable hose inlets | 1 to 2 | No hose to carry | Specific pipe requirements, premium cost |
Central hallways
The first inlet almost always goes in a hallway, because a hallway inlet reaches every room that opens onto it. In a typical ranch, one hallway inlet covers three bedrooms and a bath. In a two-story home, the upstairs hall inlet covers the bedrooms and the top of the stairs. Put it on a wall that does not have a door swinging across it, near the middle of the hall rather than one end.
Living areas
Large open rooms need their own inlet unless a hallway inlet reaches the far corner with slack. Place it on an interior wall near the middle of the room’s longest wall, not in a corner, so the hose radius covers the room evenly. Avoid walls where a sofa or entertainment unit will sit against the inlet; you will not want to move the furniture to plug in.
Stairs
Stairs are the most common cause of an extra inlet. The hose has to run the whole flight with enough slack to reach the landing at the far end. An inlet at the bottom landing works for most straight runs, an inlet at the top works for homes where the upstairs hall inlet is near the stair, and a midpoint inlet on a wall facing the stair is best when the layout allows. Test it with the rope; a stair that looks short is a long way for a hose that must also bend around the newel post.
Kitchens and the sweep inlet
Kitchens get two things: coverage from a nearby inlet, and a sweep inlet in the toe-kick of a base cabinet. A sweep inlet is a low slot that you kick open with your foot, sweep crumbs toward, and kick shut. It takes a short pipe run inside the cabinet toe-kick to join the nearest branch, so it is easy during a rough-in and a modest job on a retrofit if the cabinet base is accessible. VacPan is the best-known brand name; other makers sell equivalents. Put it where you sweep toward naturally, usually at the end of an island or near the sink, not where a stool will sit in front of it.
Garage and the utility valve
The garage gets a utility valve, a plain inlet without a decorative cover, mounted where the hose can reach both cars and the workbench. It is often fed straight off the trunk since the power unit is usually in the garage. The garage hose gets dirty, so many people keep a separate, older hose on a hanger there. Do not vacuum drywall dust, fine sawdust in volume, or anything wet through it; the clearing a clog page explains why.
Inlet height and door swing
Mount inlets at the same height as your electrical receptacles. It is the installer standard, it looks right, and it clears baseboards and furniture legs. Keep inlets out of the arc of a door swing so an open door never hides the inlet or hits a plugged-in hose. Keep them off walls where a dresser or sofa will stand. Inlets on interior walls are easier to install and avoid insulation; use an exterior wall only when there is no choice.
A planning table for a sample home
For a single-story 1,800 sq ft home with three bedrooms off a central hall, an open living and dining area, a kitchen, and an attached garage:
| Location | Covers | Why here |
|---|---|---|
| Central hall, mid-length, interior wall | Three bedrooms, both baths, hall | One hose length reaches every bedroom corner |
| Living room, interior wall near the middle | Living, dining, entry | Open area too far from the hall inlet |
| Master bedroom, wall opposite the closet | Master, master bath, walk-in closet | Far end of the house beyond hall reach |
| Kitchen toe-kick sweep inlet | Kitchen floor | Daily crumbs without a hose |
| Garage utility valve on the trunk | Garage, cars, porch | Fed directly from the unit |
Three finished inlets plus a sweep inlet and a utility valve; five openings total.
Common mistakes
- Placing inlets in corners, which wastes half the hose radius against walls.
- Forgetting the stair run and discovering the hose is 4 ft short.
- An inlet behind a door or behind furniture.
- Too few inlets because the installer’s package came with a set count.
- Skipping the garage utility valve, then hauling the house hose out to the car.
- Choosing an exterior wall when an interior wall 5 ft away would have worked.
What to do next
Mark the plan and count the inlets, then read the pipe and fittings guide to route each one back to the unit. If the house is built, the retrofit guide tells you which locations are easy to reach. If the walls are open, hand the plan to your builder with the rough-in guide. The DIY installation guide covers the rest.
Frequently asked questions
How many central vacuum inlets do I need?
Enough that a 30 ft hose from some inlet reaches every corner of every room with a few feet to spare. Manufacturers typically estimate one inlet per 600 to 1,000 sq ft of living space, but the floor plan decides it. A long ranch needs more inlets than a compact two-story of the same area. Count by walking the house, not by the rule of thumb.
Where should central vacuum inlets be placed?
In central hallways first, because one inlet there covers several rooms. Then in the largest rooms, near the center of the wall rather than in a corner. At the top or bottom of stairs so the hose runs the full stair. In the kitchen as a toe-kick sweep inlet. In the garage as a utility valve. Avoid spots behind doors and behind where furniture will stand.
How high should a central vacuum inlet be?
At the same height as your electrical receptacles unless the manufacturer specifies otherwise. That is the installer standard, it looks consistent, and it keeps the inlet door clear of baseboards. Retractable hose inlets are the exception; they mount higher, and the height depends on whether the hose runs up or down into the pipe.
Is a 30 ft or 35 ft hose better?
A 30 ft hose is the planning standard because it is light enough to carry and long enough to cover most rooms from a hallway. A 35 ft hose lets you install one or two fewer inlets but is noticeably heavier and harder to store. Plan for 30 ft; if you buy a 35 ft hose later, you simply have more slack.
Should I put a central vacuum inlet in every room?
No. That is more wall openings and pipe than you need, and more inlet doors to leak. One inlet in a hallway covers the bedrooms off it. Put inlets where one hose length covers the most floor, and add inlets only where the hose cannot otherwise reach.
Where does the inlet go on a staircase?
Either at the bottom landing or the top, positioned so the hose runs the full stair with slack to reach the landing at the other end, or at a midpoint on a wall that faces the stair if the layout allows. Stairs are a common reason for one extra inlet; test it with the rope before you commit.