How often do Fire Alarm systems require maintenance?

Under the requirements of BS5839, (for a Part 1 System or a Grade A Part 6 System) a minimum of 2 visits are required per service year.

This is because of a specific clause written in the standard which states intervals between inspection/servicing visits should not exceed 6 months.

If visits are completed at intervals of greater than 6 months the system would be deemed as non-compliant, therefore companies offering 1 visit a year is not-compliant.