By the SightShield team · · 4 min read
Why central vacuum quotes vary so much
Two quotes for a central vacuum system for the same villa can differ widely, and both can be fair. A central vacuum is not one product off a shelf: it is a power unit, a network of pipes inside the walls, a set of wall inlets, and a hose kit, all sized to your floor plan. Change any one of those and the price moves. Knowing what each part contributes lets you compare quotes line by line instead of just looking at the total.
The main cost components
| Component | What changes the price |
|---|---|
| Power unit | Suction power and airflow, motor type, filtration (bagged, cyclonic or both), noise insulation and brand |
| Piping and fittings | Total length of pipe, number of floors, number of bends and how the pipe is routed |
| Wall inlets | Number of inlets, style (standard, retractable hose, kick-plate) and finish |
| Hose and accessories | Hose length, on/off switch in the handle, electric power brush, tool kit and storage |
| Installation labour | New build (open walls) or retrofit (false ceiling, chasing, conduits), and site access |
| Exhaust and electrical | Venting the exhaust outdoors and a dedicated power point near the unit |
Power unit: the biggest single item
The power unit is chosen for the longest pipe run and the area it must serve, not for the number of rooms. A small apartment can run on a compact unit; a three-floor villa with long runs to the far bedrooms needs a stronger motor to keep suction at the last inlet. Units with two motors, better filtration or heavy sound insulation cost more. Buying a unit that is too small is false economy: suction drops at distant inlets and the motor works harder, which shortens its life.
How to size a central vacuum power unit →Inlets and piping
Each wall inlet typically covers 60 to 80 square metres with a standard 9-metre hose, so a 3,000 sq ft villa usually needs four to six inlets. Every inlet means more pipe, more fittings and more labour. Piping is dedicated central vacuum PVC with long sweep bends; ordinary plumbing elbows cause clogs and should never appear in a quote. Multi-storey homes need a vertical riser, usually through a duct, wardrobe or service shaft.
New build vs retrofit
The cheapest time to install is during construction, when pipes go into walls, slabs or false ceilings before plaster and paint. In a finished home, the installer has to route pipes through ceilings, cupboards, ducts or surface conduits, and sometimes chase walls and repair them. Retrofit labour is higher and some inlet positions become impractical, but most homes can still be fitted.
Fitting a central vacuum in an existing home →Two example homes
- Three-bedroom apartment, 1,600 sq ft, retrofit: a compact power unit in the utility area, two or three inlets reached through the false ceiling, a 9-metre hose and a basic tool kit. Modest piping, but labour depends on how much ceiling is already open.
- Duplex villa, 3,500 sq ft, under construction: a larger unit in the store room or garage, five or six inlets across two floors, a kick-plate inlet in the kitchen, a 12-metre hose with power brush, and a riser through the staircase duct. More material, but no breaking or repair work.
Running costs
Running costs are low: electricity while it runs, bags or filters depending on the type, and occasional motor service. Bagged units need replacement bags every few months; cyclonic units need the bin emptied and the filter cleaned. Motors with carbon brushes eventually need new brushes after many hundreds of hours of use. Ask for the price and local availability of bags, filters and brushes before you buy, because an imported consumable that is hard to find becomes a real cost.
Bagged vs cyclonic central vacuums →How to compare quotes
- Ask for the power unit model, its airflow and suction figures, and the maximum pipe length the maker allows.
- Check the number and positions of inlets on your floor plan, and that every room can be reached with the quoted hose length.
- Confirm the pipe and fittings are made for central vacuum systems, with sweep bends.
- Check what is included: hose, tools, power brush, wall hangers, exhaust venting and electrical work.
- Compare warranty on the motor and on workmanship, and who services it locally.
Getting a firm price
A useful quote needs a floor plan and a site visit. We mark the power unit location, inlet positions and pipe route on your plan, then price it item by item so you can see where the money goes and adjust the number of inlets or accessories to suit your budget.
Ask about our centralised vacuum service →Quick answers
Is a central vacuum expensive to run?+
No. It uses electricity only while running, plus bags or filters and occasional motor service. The cost of consumables depends on the brand, so check local availability before buying.
Does the number of inlets change the price much?+
Yes. Each inlet adds pipe, fittings and labour. Good planning places inlets so each one covers as much floor as possible with the hose length you choose.
Is it cheaper to install during construction?+
Yes. Pipes go in before plastering, with no breaking or repair work, and inlets can go exactly where you want them.
Can I add inlets later?+
Often, if the pipe network can be extended and the power unit has spare capacity. It is easier to plan an extra inlet or a capped pipe at construction time.