Sector hub
Plant Room & Boiler Room Gas Detection
Boiler houses combine large gas volumes, confined space and infrequent occupancy. Fixed detection with automatic isolation and monitored ventilation is the standard control.
- Methane detection at high level, CO at breathing height
- Slam-shut valve on the plant room gas main
- Ventilation proven and monitored, with BMS alarm routing
System architecture
Typical plant room design
- Detection panel at the entry door with repeat indication outside
- Methane heads above each burner and at the meter/regulator
- CO head at working height in the combustion area
- Automatic shut-off valve upstream of the boiler manifold
- Ventilation louvre or fan status monitored and interlocked
- Do-not-enter beacon and sounder at all access points
Ventilation monitoring
Where mechanical ventilation serves a plant room, its failure must isolate gas or raise an alarm depending on the risk assessment. Louvre position switches and differential pressure sensing are both used; both are commissioned with recorded set points.
Maintenance regime
- Annual gas-applied calibration of every head
- Functional test of valve closure and sounders
- Panel battery and fault-relay verification
- Review of any recorded alarm events with the duty holder
From our engineers' vans
Photos from real jobs — the equipment described on this page, installed and serviced by our engineers.
Frequently asked questions
Does every boiler room need gas detection?
Not automatically, but IGEM/UP/19 design and a site risk assessment commonly require it where the plant room is confined, below ground or infrequently occupied.
Should detection close the gas valve automatically?
In most plant room designs yes, on high alarm, with a manual reset so an engineer must attend before gas is restored.
Related guides
Gas Detection Systems
Fixed detection for methane, LPG and combustion areas.
Carbon Monoxide Detection
Fixed CO monitors for boiler and plant rooms.
Natural Gas Detectors
Methane sensor placement, LEL alarm levels and interlocking.
Gas Solenoid Valves
Normally closed automatic shut-off valves and diagnostics.
Gas Safety Control Panels
Interlock and proving panels, indicators and diagnostic codes.
Sensors & Controls
Air pressure switches, airflow sensors, current monitors, e-stops.
Parts in stock — ready to fit
Held in UK stock and carried on our vans, so most jobs are fixed in one visit.
Replacement gas interlock systems
Merlin, Medem, Intelligas, S&S Northern
In stock today
Air pressure switches
Fan & gas proving pressure switches
In stock today
Gas solenoid valves
Normally closed safety shut-off valves
In stock today
Quick release gas catering hoses
Commercial ranges, bays & mobile catering
In stock today
Super universal thermocouples
Fits most commercial gas appliances
In stock today
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