Professional Fire Alarm System Maintenance in London

In strict compliance with BS 5839-1 section 45, we ensure that $100\%$ of all detectors, call points, and sounders are tested over a 12-month cycle. For quarterly contracts, we test a minimum of $25\%$ of devices per visit; for bi-annual contracts, we test $50\%$ per visit.

Absolutely. True fire alarm maintenance goes beyond checking sensors. We test auxiliary relays to ensure the control panel successfully communicates with third-party systems—automatically releasing access-controlled doors, shutting down ventilation dampeners, and recalling passenger lifts during a simulated alert.

We test their sensitivity thresholds using specialised equipment. However, because ionisation detectors contain trace amounts of Americium-241 and are prone to false alarms from moisture, we will flag any aging units in your report and manage their safe disposal and replacement with modern optical or multi-sensor alternatives under Environment Agency guidelines.

Routine maintenance covers the testing of the system as it was originally commissioned. If structural changes or new partitions create "dead spots" or breach BS 5839-1 spacing rules, we can provide a separate variation quote to redesign, relocate, and re-commission the affected devices to keep the building compliant.

Yes. We don't just check the voltage with a standard multimeter. Our engineers use specialised battery load testers to simulate a mains power failure. This verifies that your standby batteries can truly sustain the system for the legally required 24-hour (or 24-hour plus 30 minutes of full alarm status) threshold.

If a fault renders a zone or the entire system inoperable, our engineer will immediately inform your designated Responsible Person on-site. We will issue an urgent "Critical Non-Compliance" notice and provide an immediate remediation quote, helping you implement a temporary fire watch if required by your insurance provider.

We coordinate sounder and voice-alarm testing during pre-agreed windows, typically early mornings or weekends. For critical environments like server rooms, we can temporarily isolate localised output relays or gas suppression systems during testing so that no accidental discharges or equipment shutdowns occur.

Yes. Infinity Fire & Security holds full, third-party modular BAFE SP203-1 accreditation for Maintenance. After every service, you receive a formal Certificate of Testing, which acts as your definitive legal proof of compliance during London Fire Brigade audits or health and safety inspections.

Yes. We check the physical housing, operation, and glass/plastic elements of all manual call points. We also verify that your on-site team has the correct testing keys and training to perform your mandatory weekly user tests, which we cross-reference with your logbook entries.