"Anything that is designed to keep you warm generates heat and is a potential fire risk if not used properly," Fire and Rescue NSW zone Superintendent Tom Cooper said.

He told the Leader the devastation left behind long after the flames of a house fire are doused can be haunting for residents and first responders alike.

"We see people on their worst day," he said.

"Even if no one gets injured, your home can be severely damaged by a kitchen fire and your house could be out of action for ages.

"There are irreplaceable things that get damaged or lost and people are really put in a devastating situation."

Superintendent Cooper said firefighters were urging residents to "be safe not sorry" as they try to warm up their homes in the wintry weather.

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He said the number one priority was making sure smoke alarms were operating smoothly.

"It can't save your life if it's not working," he said.

Superintendent Cooper said most home fires can be avoided if safety is put first.

That includes dusting off heaters and making sure electrical chords are in good nick, ensure chimneys are clean and working, burn hardwood rather than old furniture, don't bring outdoor heaters in and don't put anything too close to heaters or fires, or where things could fall onto them.

He said going to sleep at night counted as leaving heating appliances unattended and urged everyone to act with caution.

Fire and Rescue NSW staff are on hand to help with smoke alarms and other questions. People can visit the station or book a home fire safety visit online.

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