
A warning was issued in early January after two separate house fires in 24 hours in Christchurch were caused by the "prohibited" Serene bathroom heaters.
WorkSafe issued a ban on the sale and use of the Serene S2068 heaters in February 2024 due to safety concerns, such as overheating and a design flaw that makes it dangerous when left on for extended periods.
On Monday, the Ministry of Business, Innovation and Employment (MBIE) said it "is aware of approximately 28,000 Serene S2068 Heaters still in properties across the country, despite a compulsory recall and a prohibition to use".

"So far, since the recall was announced last year, around 16,000 heaters have been decommissioned by electricians or returned to the store they were bought from.
"That’s a fantastic figure to see, knowing that 16,000 of our homes are safer, and a lot of that work is down to the committed electricians and suppliers working across the country to support this recall.
"However, we want to see that figure rise. We know over Christmas there were two fires because of these heaters, and as the heaters get older and the known issues inside them get worse, and as we get into colder months, we are likely to see more and more fires occur.
“Don’t let the next fire be in your home. We urge you to check your bathroom, your parents’ bathrooms, your rentals, your hotel or motel’s bathroom, wherever you find yourself. If you find a S2068 Serene Heater, turn it off, don’t use it, and contact the supplier it was bought from."
Caplin said MBIE has been working with stakeholders, such as Master Electricians, to improve the information available around the recall.
"It’s so important to check for these heaters," said Caplin.

"We've heard from our overseas counterparts that they only see around 20% of the products returned when a recall is issued.
"The fact that we have almost 37% returned really highlights the work being done, but also the need for more people to make sure they are checking their bathrooms."
- To find out more about how to check if your heater was included in the recall, what other models pose a risk, and what you can do if you have one of these heaters on the Consumer Protection website.