Methane is a colourless, odourless, flammable gas which is lighter than air.
The familiar smell of natural gas when used as a fuel is achieved by the addition of an odorant, as a safety measure.
Natural Gas/Methane is reportedly 86-105 time more powerful than CO2, as a greenhouse gas at disrupting the climate according to climate change scientists.
Therefore an installed gas control system that quickly and safely identifies any possible gas escape should be employed for the long term economic, environmental and safety benefit of the site.
There is legislation and design standards based around gas safety for education buildings, these include the use of gas pressure proving for teaching spaces and gas detection for areas of plant/boiler rooms.
Monitoring for a gas leak with valve isolation is used as way of reducing identifiable risks. It is seen as a measure to help confirm the integrity of the installation and if a leak is detected to isolate the gas valve to prevent continual gas escape and to instigate an investigation and repair.