The helmet - the Guy Nelson Trophy - is to be presented annually to a Rural Fire volunteer in memory of Guy, but will stay with the Nelsons in the meantime while decisions are made on what the trophy will be presented for.
"You do so much more than save lives," Mrs Chadwick told the fire fighters.
"You give service over and above your other life. You're our treasures and I know you all get so much out of volunteering."
Mrs Chadwick also praised members of both the Rural Fire and New Zealand Fire services for successfully battling a major bush fire at Sulphur Point just last month.
"It could have been so drastic if not for your teamwork," she said.