Location
Manchester combines a busy regional core, extensive pre-1945 housing stock and persistent NO₂ along key corridors. Indoor air rarely meets WHO 2021 thresholds without active intervention.
Outdoor PM2.5
Above WHO 5 µg/m³
NO₂ hotspots
A57, A56, Mancunian Way
CAZ
Greater Manchester (paused)
Housing stock
Victorian terrace heavy
Manchester's annual PM2.5 sits above the WHO guideline, with elevated NO₂ around the Mancunian Way and inner ring road. The city's pre-1945 terraced stock — much of it retrofitted for energy efficiency without parallel ventilation upgrades — produces high rates of condensation, damp and mould in winter.
Modern central offices and apartments rely on mechanical ventilation; performance varies widely depending on commissioning, filter spec and maintenance.
Terraced housing. Post-retrofit air-tightness without MVHR or trickle upgrades — damp, mould and CO₂ accumulation. Humidity & health →
City-centre offices. Roadside NO₂ infiltration, recirculation-heavy AHUs, drifting setpoints. Office air quality →
Schools. Classroom CO₂ regularly above 1500 ppm during heating season; PM2.5 spikes near drop-off zones.
Pair envelope sealing with mechanical ventilation and ePM1 50% (MERV 13) or higher filtration. Add continuous PM2.5, CO₂ and humidity monitoring — assumptions about Manchester's air rarely match measurements. IAQ monitoring →
We deliver IAQ testing, VOC and mould investigation, ventilation assessment and continuous monitoring across central Manchester, Salford, Trafford, Stockport and the wider M60 catchment. Same-week site visits for urgent cases; reporting against WHO, BS EN 16798-1, WELL and BREEAM benchmarks.