Equipment & Monitoring

Equipment should support a protection strategy. Buying instruments and filters without a defined function often creates false confidence.

Functional categories

• Air: fan, filtration, ducting, valves and pressure measurement.
• Radiological monitoring: instruments selected for the measurement objective.
• Power: resilient supply for critical ventilation, monitoring, controls and communications.
• Control: local controls, remote activation, status feedback and manual override.
• Communications: reliable access to official information and system status.
• Habitability: water, sanitation, lighting and environmental monitoring.
• Contamination control: defined clean/dirty interface and suitable consumables.

Remote activation

A protected ventilation system can be designed so that it can be activated remotely when occupants are away from home. This can allow the protected space to be placed into its defined operating state before occupants return, where that is appropriate for the scenario.

Remote control should be an additional capability, not a single point of failure. A robust design retains local controls and manual override, provides positive confirmation of system state, and does not depend exclusively on a cloud service or the household internet connection.

Operation during grid failure

Loss of mains electricity should not automatically mean loss of protection. Critical loads can be placed on a backed-up electrical circuit supplied by a home battery, dedicated battery system or other suitable emergency-power source.

The design basis should identify the actual critical load — typically ventilation, controls, pressure sensing, selected monitoring and communications — and calculate the required autonomy from measured or specified power consumption. The complete chain matters: battery capacity, inverter capability, transfer behaviour, protected circuits, startup currents and system restart after an outage.

Fail-safe control architecture

1. Local first: the shelter must remain operable without internet access.
2. Remote second: authenticated remote start/stop and mode selection can be added for convenience and early activation.
3. Status feedback: remote activation should confirm fan operation, pressure differential, power source and relevant alarms.
4. Power resilience: critical shelter functions remain on backup power during a grid outage.
5. Manual override: occupants must be able to operate the system locally if automation fails.
6. Defined recovery: behaviour after power loss, inverter transfer or communications failure is specified and tested.

Specification before procurement

ShelterFactor will focus on performance requirements, compatibility and validation rather than generic product lists. Remote control and backup power should therefore be commissioned as part of the protection system, not treated as unrelated smart-home accessories.