The NDP is calling on the Yukon government to hold a public inquiry into the January deaths of five people from carbon monoxide poisoning.

Official Opposition Leader Liz Hanson said Tuesday a public inquiry would allow for more information to be made public than a coroner's inquest would.

In a coroner's inquest, the jury is asked to come to a conclusion on how, when and where a person died.

Jury members are then given the opportunity to make recommendations on how a similar death could be prevented in the future.

Valerie and Bradley Rusk, their two children, Gabriel, 13, and Rebekah, 11, and family friend Donald McNamee were found dead in their rented Centennial Street house on Jan. 29.

The territory's fire marshal has submitted an investigation report to the Yukon coroner's office and the RCMP.

The report concludes that the ice blockage contributed a build-up of gases, including carbon monoxide, in the house.

When firefighters arrived at the home, the CO levels were measured at 10 times what would normally be picked up by a basic alarm system.

The report also determined that the inner lining of the brick chimney had deteriorated, and debris was found at the lowest point in the chimney.

This brick and mortar debris obstructed and slowed the flow of flue gases from the furnace to the exterior of the house.

"Low temperature flue gases coming from the high-efficiency burner in the boiler combined with the extremely cold temperatures at the time contributed to the build-up of ice.

"The combined factors were determined to be the cause of this tragic incident,” the report concludes.

Hanson suggests the report points to improper installation, namely a new high-efficiency furnace into an old chimney.

Fire marshal Dennis Berry said the coroner's investigation is ongoing. The most accurate information to date is what was released late last week, he said.

Those findings do not specifically mention the system's installation.

Sharon Hanley, the Yukon's chief coroner, said today she still has not decided whether to hold an inquest.

"We haven't completed our investigation,” she said. "Once that step is complete and all the information is gathered, it is something we will look at.”

Hanson said an inquest would only answer the question of how the people died based on a very narrow perspective.

"The ‘how' these people died needs to be expanded,” she said.

"Yukoners have a right to know how our laws, regulations, services and inaction failed these people.”

A public inquiry would cover topics like the Landlord and Tenant Act, gaps in the territory's inspection requirements and current training standards people who work with heating systems, Hanson said.

Cabinet spokesperson Elaine Schiman repeated the government's message since the tragedy happened, saying the appropriate course of action is to wait until the investigation is complete before deciding on a next step.