Central vacuum installation cost depends mostly on how many inlet points you want and how accessible your walls are for running tubing.
What to look for
- Power unit size matched to your home's square footage.
- Number of inlets and their placement, since too few makes the system less convenient to actually use.
- New construction versus retrofit — retrofitting existing walls costs more due to the extra labor involved.
- Warranty on the power unit versus the tubing and inlets.