Four stages. One column. No excavation. The full technical story of how we transform Britain's existing street infrastructure into a distributed clean air network.
The Clean Air Initiative column integrates air filtration, low-power cellular connectivity, and environmental sensing into a complete replacement lighting column — factory-fitted, connecting to the stub of the existing post.
A complete replacement column, factory-fitted with the full filtration stack and sensing system, connecting to the stub of the existing post — reusing the foundation and power supply already in the ground, with a connection section that adapts to site condition. Available in standard RAL colours to match local street furniture specifications.
Installation by existing lamppost maintenance contractors — the same teams that change bulbs and service street lighting. No specialist skills. No heavy plant. No road closures.
Air is drawn in through the ground-level intake grille at 100–200mm above pavement — the height where pollution is most concentrated. It passes through four filtration stages before being exhausted as clean air above head height.
The filtration cartridge is a single modular unit, secured behind a tool-access maintenance panel so it stays tamper-resistant on a public street while remaining quick for an authorised technician to swap during routine visits. Target replacement interval: 6–12 months.
Each stage targets a different class of pollutant. Together they achieve near-total removal of the most harmful particles and gases from processed air.
Each unit carries its own low-power cellular IoT module (NB-IoT / LTE-M) — the same class of connectivity used by councils’ existing smart streetlight systems. No fibre, no pavement works, no shared hub: every post reports independently, so a damaged unit takes out one data point, not a street. A unit that goes silent is itself an alert. For off-grid sites — rural roads, motorways, export markets — a satellite-connected variant is available.
The unit runs from the existing street lighting circuit. The exact power budget — how much air the fan can move within a column's supply — is precisely what our current CFD engineering study is quantifying: we publish measured figures, not guesses. Connectivity and sensing draw single-digit watts; the fan is the main load.