Alan wrote
Rod Speed wrote

The real problem with the cost is that only a tiny subset
of houses ever have a fire that sprinklers would help with.

You will not be able to get house/building
insurance without a sprinkler system

Don't believe that. That hasn't happened with back
to base alarms or with fire extinguishers in cars either.

- an it will have to be maintained on an
annual basis by a "professional" organisation.

Don't believe that either, that hasn't happened with alarms
or with the electrical or water or gas supply either.