LoopWatt: Fire Alarm NFPA 72

Build the device list once, inspect device by device, and generate an authority ready NFPA 72 report in one tap. Calculators cite the code. Fully offline.

LoopWatt is the offline field toolkit for fire alarm and life safety technicians who inspect, test, and maintain systems under NFPA 72. The inspection report is the product, and everything else supports it.

THE INSPECTION FLOW

• Build a building's device inventory once. Every future annual inspection starts from last year's list.
• Test device by device with big pass, fail, deficiency, and not accessible taps. Auto advance keeps you moving; the benchmark is about 1.76 minutes per device, so every saved tap is billable time.
• Add a note or photo when you need one. Running totals stay in view.
• One tap produces the NFPA 72 style Record of Inspection and Testing: a clean, authority ready PDF you sign and share from the field.

CALCULATORS THAT SHOW THE CODE

• Battery and secondary power sizing: 24 hour standby plus the alarm period, with the aging factor and the next standard battery.
• Notification appliance circuit voltage drop to the 16 volt floor, lump sum or point to point.
• Audibility, visible notification candela, and detector spacing with the half spacing and 0.7 methods.
• Every result shows the formula, the worked steps, and the NFPA 72 citation for your selected edition (2016, 2019, 2022, 2025).

TROUBLESHOOTING AND REFERENCE

• Guided decision trees for ground faults, opens, signaling line circuit trouble, nuisance alarms, notification circuits, battery and power, and communicator failure.
• A trouble family reference and a panel brand library covering the major manufacturers.
• Chapter 14 inspection and testing frequencies, candela and spacing tables, the device current draw library, NEC Article 760 wiring, and end of line resistor values.

FORMS AND DOCUMENTATION

• Record of Completion, acceptance and commissioning checklist, detector sensitivity record, deficiency report, service work order, and a job hazard analysis, all to PDF.
• Reusable company, crew, and site profiles. Photo and signature capture. Combine a whole site into one packet.

NEVER LEAVE A SYSTEM IMPAIRED

• The impairment workflow tracks every step: notify the authority having jurisdiction and the monitoring company, place the system on test, post a fire watch, and confirm restoration. Reminders fire until you close it.

BUILT FOR THE FIELD

• Fully offline. Every reference, calculator, form, and tree ships inside the app. Outgoing email queues until you find signal.
• Glove friendly: big tap targets, high contrast, big readable numbers.
• 100% private: no account, no server, no analytics, no ads, no tracking.

FREE AND PRO The reference library search, unit conversions, and end of line resistor reference are free forever. LoopWatt Pro unlocks the full calculator suite, the inspection flow with PDF reports, all forms, and the guided troubleshooting trees, as a monthly or annual subscription or a one time lifetime unlock.

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LoopWatt is a field aid, not a substitute for NFPA 72, NEC Article 760, NFPA 101, the engineered drawings, or the manufacturer manuals. Work must be performed and verified by a qualified, certified person (NFPA 72 Chapter 10). Calculations are estimates to be verified by a qualified person.