Mr Horn said the team will be firefighting and helping with containment plans for at least 20 days with the potential to stay longer.
"They are all happy that they have been selected to go, but also a little bit apprehensive," he said.
Mr Lyall said he was reasonably apprehensive and nervous.
"It's a big unknown to me. I haven't been to Australia before. "I have been deployed within New Zealand for other jobs but not to go overseas. "I'm also excited, it's a new adventure to participate in."
"My wife has been amazing and she didn't hesitate, she said if you want to go, go."
Mr Lyall has two daughters aged 12 and 13 and a son aged 11.
"My girls said they were excited for me, but they were also very worried.
"All of my kids are really keen to be part of the volunteer fire service when they get older."