By the SightShield team · · 3 min read
Yes, most finished homes can be fitted
Central vacuum systems are easiest to install while a house is being built, but that does not rule out finished homes. Installers have long retrofitted them into existing houses by using spaces that already exist: false ceilings, service ducts, wardrobes, under-stair cupboards and the gap behind kitchen units. The question is not whether it can be done, but how neatly, and how many inlets you can place where you want them.
How pipes are routed in a finished home
| Route | Where it works | What to expect |
|---|---|---|
| False ceiling | Apartments and villas with gypsum or grid ceilings | Pipes run above the ceiling and drop to inlets inside walls or cupboards; a few ceiling panels are opened and refinished |
| Service ducts and shafts | Multi-storey villas and duplexes | A vertical riser connects floors without breaking slabs |
| Wardrobes and cupboards | Bedrooms and utility areas | Pipes run at the back of a cupboard, with the inlet on the side panel or a nearby wall |
| Wall chasing | Brick walls, short drops from ceiling to inlet | A narrow groove is cut, the pipe is laid in, and the wall is plastered and painted |
| Surface conduit or skirting | Where nothing else is possible | Neat but visible; used for short runs |
Where the power unit goes
The power unit is mounted where its noise and exhaust do not matter: a utility balcony, store room, car porch, garage or terrace room. It needs a power point close by and a route for the exhaust to the outside. In apartments the utility balcony is the usual choice; in villas, the garage or a room under the stairs. Placing it near the middle of the pipe network keeps runs short and suction strong.
The retrofit process step by step
- Survey: the installer studies the floor plan, ceilings and ducts and marks possible inlet positions.
- Hose test: a hose of the planned length is stretched from each proposed inlet to confirm it reaches every corner, including behind doors and beds.
- Route planning: the shortest pipe path from each inlet to the power unit is drawn, avoiding beams and other services.
- Installation: ceiling panels are opened, pipes and low-voltage control wires are laid, and inlets are fixed.
- Finishing: walls and ceilings are repaired, painted and cleaned up.
- Testing: suction is checked at every inlet, and joints are checked for leaks.
How much mess to expect
In a home with false ceilings, a retrofit typically takes one to three days and involves a few opened panels and short wall chases. Homes without false ceilings need more chasing or visible conduit, and plastering and painting add time. Furniture near the work areas should be moved or covered. A careful installer vacuums up its own dust, and with a working central vacuum, that is the first job it does.
When retrofit is not worth it
- A small flat with solid concrete ceilings and no false ceiling, where every route means heavy breaking.
- A rented home, unless the owner agrees and you will stay for years.
- Homes planned for major renovation soon: wait and install during the renovation.
- Where the only possible power unit location is inside living space, with no way to vent the exhaust.
Combine it with other work
The best moment for a retrofit is when ceilings or walls are already open — while installing a false ceiling, rewiring, fitting home automation or doing interiors. Coordinating with your interior designer means the pipes are hidden at no extra breaking cost and inlets can be matched to switch plates and finishes.
Our centralised vacuum installation →Quick answers
Can a central vacuum be fitted in an apartment that is already finished?+
Usually yes, especially if it has false ceilings. Pipes run above the ceiling and drop to inlets in walls or cupboards, with the power unit in the utility area.
How long does a retrofit take?+
Typically one to three days for a home with false ceilings, longer if walls need chasing and repainting.
Will retrofit pipes be visible?+
Normally not. Pipes go inside ceilings, ducts and cupboards. Surface conduit is used only for short runs where nothing else is possible.
Is suction weaker in a retrofitted system?+
Not if the pipe runs are planned well and the power unit is sized for the longest run. Too many bends and long detours reduce performance.