Otamatea High School gym users were perplexed to see Orford working out in full firefighting kit as he trained for the event.
"I had to apologise to a few people for the hell of a racket I was making," he said.
Training runs up Mt Parihaka in Whangārei and Mt Manaia in Whangārei Heads – to name a few – also drew some confusion from passersby.
"I got a few weird looks running up the hill with the gear," Orford said. "People wonder what the hell is going on. I'd get asked where the fire is."
Orford and his Marsden Refinery work mates firefighters are spurred on in the gruelling challenge by thoughts of brave 6-year-old Florence London.
The small girl with a big smile was diagnosed with acute lymphoblastic leukaemia in February 2019 and underwent long bouts of intensive treatment at Starship Hospital.
"Florence is definitely our motivation," Orford said.
Although he admitted his competitive streak would help drive the previous winner in the event's grand masters division across the finish line.
"It's a head game," Orford said. "You hate it while you're doing it but then you get a massive adrenaline rush when you finish."
The fastest time last year was claimed by Auckland firefighter Josh Harrison who reached the top of the tower in 8 minutes 17 seconds.
Christchurch's Helen Sinclair was the fastest woman up the Sky Tower with a time of 13 minutes 28 seconds.