Detector and call point layout, loops, cause and effect, EN 54 and NFPA 72 practice.
What aspirating smoke detection is, where it beats point and beam detectors, the EN 54-20 sensitivity classes and the design rules for sampling holes, transport time and exhaust.
Aspirating Smoke Detection: When and How Read More »
How to space voice alarm loudspeakers so messages are both loud enough and intelligible: coverage diameter, overlap, tap power, level check, STI targets and amplifier loading.
Voice Alarm Speaker Spacing and Intelligibility Read More »
How to size fire alarm standby batteries: the formula, which standby and alarm durations apply under EN 54 practice and NFPA 72, and a worked example from currents to battery size.
Fire Alarm Standby Battery Calculation Read More »
Where manual call points go, how high to mount them and how to check walking distance on the plan, with EN 54-14 practice and the NFPA 72 equivalents side by side.
Manual Call Point Placement: Distances, Heights, Exits Read More »
How to build a fire alarm cause and effect matrix from the fire strategy: rows of inputs, columns of outputs, clear actions in every cell, lift and suppression logic, sign-off and testing.
How to Write a Fire Alarm Cause and Effect Matrix Read More »
Key fire alarm design values under EN 54 / CEN/TS 54-14 and NFPA 72 side by side: detector coverage, call points, sound and visual alarms, zoning, cabling and standby power.
EN 54-14 vs NFPA 72: Fire Alarm Design Differences Read More »
How to place optical beam smoke detectors in large spaces: spacing between beams, distance to walls, mounting height, rigid fixing and a worked warehouse example.
Optical Beam Smoke Detectors: Where and How to Place Them Read More »
Detector spacing is a distance rule, not an area rule. Here are the smoke and heat detector radii, corridor, beam and slope rules, the NFPA 72 equivalents and a full office floor counted step by step.
Smoke Detector Spacing (and Heat Detectors): Practical Rules Read More »
A conventional panel knows the zone; an addressable panel knows the device. Here is how each system works, a simple way to choose, and the alarm sound and visual rules that apply to both.
Conventional vs Addressable Fire Alarm Systems Explained Read More »
Good loop design is mostly bookkeeping: an address budget with 20 % spare, isolators that respect the 32-detector rule, zones a fire fighter understands and cables that survive the fire. A two-loop office example shows every step.
Fire Alarm Loop Design: Addresses, Isolators, Zones and Cables Read More »