Enclosed Parking Structures
Explore our complete solutions available for multi-story and other enclosed parking structures.
Carbon monoxide (CO) and nitrogen dioxide (NO₂) are serious health risks in enclosed UK car parks and parking garages, where vehicle emissions can build up quickly. High-traffic areas such as shopping centres, commercial buildings, and transport hubs require reliable monitoring to keep drivers, pedestrians, and staff safe.
S&S Northern’s CO and NO₂ monitoring systems deliver real-time detection, triggering ventilation and alerts to maintain safe air quality. Designed for multi-storey and underground car parks, our sensors provide long-lasting, dependable performance while ensuring compliance with UK safety standards.
All products adhere to:
HSE
Document F
BS EN 50545-1
High performance safety products for enclosed parking structures
Frequently asked questions
Why do I need to detect for CO and NO2 in these spaces?
CO and NO2 are two toxic gases that emit from the exhaust of diesel and gasoline fueled cars. CO is an asphyxiant that has a 220% greater binding affinity with blood cells than oxygen has. NO2 is a respiratory irritant that inflames the lining of the lungs and reduces the bodies immunity to lung infections.
BS EN 50545-1 requires CO and NO₂ gas detection in enclosed car parks, triggering ventilation and alarms at defined concentration thresholds. It covers sensor placement, accuracy, calibration, response times, fault monitoring, and ensuring systems reduce gas exposure to safe levels.
How many gas detectors do I need?
As a general guideline, one detector can cover a 15-foot radius per sensor.
Why would I want a gas detection system?
Gas detection systems can significantly reduce energy consumption and costs, as code requires ventilation to operate continuously or at a reduced rate with a gas detection system and ramp up in the case of significant gas levels.
Can I integrate the detectors with a control panel?
Yes, integration between the detectors and a control panel is possible using our ParkSafe panel. It directly manages ventilation systems via 6A relays that respond to gas alarm levels and includes a 0–10V output for controlling variable frequency drives (VFDs).
Is it possible to communicate with the building management system through BACnet?
Depending on the application, our CO and NO₂ detectors can communicate either with the ParkSafe control panel or directly with a Building Management System (BMS) to control ventilation based on the programmed sequence of operations.

