David Carrigg, The Province
The deaths of two Vancouver teens while holidaying in India is being linked to improperly installed gas hot-water heaters.

Now the families are warning visitors to India to make sure a bathroom has an open window if one of the heaters, known as gas geysers, has been installed.

"[Gas geysers] are being installed improperly by uncertified technicians all over Punjab," said Kalwinder Manhas, of Vancouver, whose 16-year-old son, Prabhjot (Justin), died in January.

"They have caution labels stating not to install them in a bathroom or kitchen without sufficient ventilation, but that's where they are still being installed."

Manhas, her husband and two sons went to the town of Paldi for a family wedding in January.

Manhas' inlaws had recently built a new home with a gas geyser in the bathroom. A geyser is a small water heater fuelled by propane which is cheaper than traditional electric hot water heating and more efficient than an open flame.