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Skilled trades updates

A new skilled trades certification has been announced by the Province. Learn more about how it affects our gas and electrical clients.  

An air handling unit dispersed dangerous concentrations of carbon monoxide in the hallways of a residential building

Incident Investigation

An air handling unit dispersed dangerous concentrations of carbon monoxide in the hallways of a residential building

September 30, 2021

Gas

Reference Number:

II-1261773-2021 (#24231)



Location: Surrey

Regulated industry sector: Gas - Natural gas system

Incident overview

An air handling unit created conditions which allowed high concentrations of CO to be distributed throughout common hallway areas of a building on two separate occurrences. After investigation, it was noticed that the ducting filters had become blocked. Also, there were unsealed gaps between the filters and the blowers. These conditions allowed the boilers in the mechanical room to produce high levels of CO which were then distributed by the air handling unit into the building.

 

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