What caused the carbon monoxide leak in the Regina apartment building?

The Regina fire chief stated the carbon monoxide leak was caused by a critical failure in a boiler, with the building owner suggesting an internal explosion in a newly installed boiler. Investigations are ongoing.

Why did the carbon monoxide detectors in the Regina building reportedly not go off?

Tenants have questioned why the carbon monoxide detectors in the building failed to activate during the incident. Management stated detectors were in 'needy places,' but investigations are looking into the alarm system's malfunction.

When did the tragic carbon monoxide poisoning incident occur in Regina?

The carbon monoxide poisoning incident that resulted in the death of an 11-year-old boy occurred on December 19, 2025, in a Regina apartment building.

Home / Disasters and Accidents / Silent Killer Strikes: Boy Dies Hours After CO Alarm Ignored

Silent Killer Strikes: Boy Dies Hours After CO Alarm Ignored

8 Feb

•

Summary

A boy died from carbon monoxide poisoning hours after a detector alerted a neighbor.
Building owner claims boilers were commissioned day before the fatal incident.
Tenants question why CO alarms in the building failed to activate.

An 11-year-old boy, Henry Losco, died from carbon monoxide poisoning in a Regina apartment building on December 19, 2025. This occurred mere hours after a neighbor's carbon monoxide detector activated. The neighbor reported opening a window and using a fan after being told by maintenance to do so, regretting not pushing for further action.

Tenants are demanding accountability, as many CO detectors in the building reportedly failed to sound during the incident. Emails show a tenant repeatedly questioned the building management about the alarms and requested detectors in every apartment. Management eventually responded, stating detectors were in 'needy places'.

The building's owner, Mark Frentz, indicated that two new boilers were commissioned on December 18, 2025, the day before the death. The Technical Safety Authority of Saskatchewan (TSASK) confirmed they inspected the boilers on December 18 and found them to be operating correctly. However, the Regina fire chief later stated the leak stemmed from a 'critical failure in a boiler'.