A central vacuum for an RV, boat, or tiny home is a compact bagged power unit mounted in a cabinet or storage bay, one or two inlets, and a stretch hose that reaches the whole space. It gives you the two things a house system gives: the dirt and the noise are somewhere else, and there is no machine to store. What it does not give you is a house system’s suction, capacity, or run length. This guide covers how the compact units differ, how they are powered, how they mount, and where they fall short.
What a compact built-in unit is
The power unit is a small canister with a motor, a bag, and often a port on its face that the hose plugs straight into, so the unit itself is the inlet. Some models are remote-mounted instead, with the unit in a bay and a short run of pipe to a wall inlet in the living space. Bags are small and specific to the model. Several makers sell these for RVs, boats, garages, and small homes under the same part numbers; the use case does not change the hardware.
12V vs 120V
Most compact units run on 120V AC, which means shore power, a generator, or an inverter. That is fine at a campsite or a marina and inconvenient in a boondocking rig or at anchor, where running the inverter to vacuum pulls a meaningful chunk of a battery bank for a small motor. Some makers offer 12V DC versions for exactly that use, running from the house battery and drawing a few hundred watts for a few minutes. The 12V units are less powerful; that is the trade for not needing the inverter.
Check the model’s spec sheet for voltage and amps before buying, and match it to how you actually camp or cruise. A 120V unit is the right choice for a coach that is always plugged in. A 12V unit is the right choice for a van or a sailboat that lives off-grid.
| 120V AC unit | 12V DC unit | |
|---|---|---|
| Power source | Shore power, generator, inverter | House battery |
| Suction | Higher | Lower |
| Wiring | Plugs into a receptacle; a new receptacle is a licensed electrician’s job | Fused run from the 12V panel, sized to the draw |
| Best for | Rigs that are usually plugged in; boats at a slip | Boondocking, vans, sailboats at anchor |
| Watch for | Inverter capacity if used off-grid | Voltage drop on long thin wire |
Any new 120V receptacle for the unit, in a coach or on a boat, is line-voltage work for a licensed electrician or a qualified RV or marine technician, because RV and marine AC wiring has its own rules.
Stretch hoses
The hose is a stretch hose: compressed to a few feet for storage, expanding to roughly 25 to 35 ft when pulled out, with extension sections available. It plugs into the port on the unit or a wall inlet, and the unit starts when the hose is inserted, by a switch on the unit, or on some models by a remote handle. The hose stores in a cabinet or on a hanger rather than inside the wall. Stretch hoses are lighter and more compact than a house hose and less durable; they wear at the cuffs and lose stretch over the years, and they are the most common replacement part.
Mounting
Mounting matters more than in a house because the unit lives in a small enclosed space and rides down the road or across the water. The rules:
- Cooling air. Do not put the unit in a sealed locker. It needs air around it and a path for its exhaust, or it overheats and the bag loads with its own heat.
- Exhaust. The unit exhausts into the space around it. In an under-seat cabinet with a vent that is acceptable; in a closed wardrobe it fills the clothes with warm dust. Some units can be fitted with an exhaust run to the outside or to an open bay.
- Access. You have to change the bag. Mount it where the lid opens without removing the unit.
- Structure. Fasten it to a frame member, a cabinet face frame, or a backing plate, not to a thin panel. On a boat, mount above the bilge and away from spray.
- Inlet placement. If it is a remote-mounted unit with a wall inlet, put the inlet where the stretch hose reaches both ends of the coach. In a long fifth wheel or a boat with a cabin forward, you may want two inlets.
Limitations
These are small vacuums. The bags hold a fraction of a house unit’s bag, the suction is modest, and they are meant for crumbs, sand, dust, and pet hair in a few hundred square feet of mostly hard floor. They will not deep-clean a coach full of carpet the way a house system with an electric powerhead does, and a 12V unit will not match a corded portable. They also share every house central vacuum’s rules: never vacuum water or wet sand, never fine drywall dust, never anything that could smolder.
What to check before buying
| Check | Why |
|---|---|
| Voltage and amps on the spec sheet | 12V vs 120V decides where it can run |
| Bag part number and availability | Small-run bags go out of stock |
| Hose length when stretched and extension options | Must reach the far end of the coach around the furniture |
| Unit dimensions vs the cabinet | Plus clearance for the lid and cooling |
| Exhaust direction | Must not fill a sealed space |
| How it turns on | Hose insertion, unit switch, or remote handle |
| Filter behind the bag | Some have one; it needs changing too |
Common mistakes
- Buying a 120V unit for a rig that rarely plugs in.
- Mounting it in a sealed wardrobe.
- Fastening it to a quarter-inch cabinet side.
- Vacuuming wet sand at the beach.
- Letting the bag overfill because the lid was behind the cargo.
What to do next
The best RV central vacuums roundup compares current compact units by voltage, bag, and hose. If you are weighing a built-in against a portable for a small space, the central vacuum vs portable vacuums comparison is honest about where a portable wins. For a tiny home on a foundation rather than wheels, a small house unit with one or two inlets is often the better choice; the sizing guide covers the smallest house units.
Frequently asked questions
Can you put a central vacuum in an RV?
Yes. Compact built-in vacuums are made for RVs, boats, and small homes. The power unit is a small bagged canister that mounts in a cabinet, under a dinette seat, or in a storage bay, with one or two inlets and a stretch hose. Many RV manufacturers offer them as a factory option, and they are a common owner retrofit.
Are RV central vacuums 12V or 120V?
Most are 120V AC and run from shore power, a generator, or an inverter. Some makers offer 12V DC versions for off-grid use that draw from the coach or house battery. Check the model's spec sheet before you buy, and if you boondock often, decide whether you want to run the inverter to vacuum.
How does an RV central vacuum hose work?
It is a stretch hose, compressed to a few feet for storage and expanding to roughly 25 to 35 ft when pulled out. It plugs into the inlet, usually a port in the face of the unit or a small wall inlet, and some units turn on when the hose is inserted or by a switch on the unit. The hose stores in a cabinet or a hanger rather than in the wall.
What is the difference between an RV central vacuum and a Dustbuster?
The built-in unit is mounted and plugged in permanently, has a bag that holds far more than a handheld, exhausts away from where you are cleaning, and reaches the whole coach with one hose. A handheld is cheaper and needs no installation. In a small RV with hard floors a good handheld is a fair alternative; in a larger coach with carpet the built-in wins.
Where do you mount an RV central vacuum?
In a cabinet, under a seat, in a closet, or in a pass-through storage bay, wherever it can get cooling air, you can reach it to change the bag, and the hose port or inlet is convenient. Keep it out of sealed lockers where the exhaust fills the space, and out of bays where it will get wet or hit by cargo. Secure it to structure, not to thin cabinet panels, because it rides down the road.
Can you install an RV central vacuum on a boat?
Yes, the same compact units are sold for boats. The extra concerns are moisture, corrosion at the inlet contacts and the plug, mounting so the unit cannot shift in a seaway, and feeding it from shore power or an inverter. Keep the unit above the bilge and away from spray, and never vacuum water or wet sand with it.