Assistant coach Alex Armstrong said the team took the first period of the game to adjust to playing in the 35-degree heat but once they hit the front they didn't look back.
"It was a good result but I think we struggled in the first 20 minutes to cope with the conditions but once we got our noses in front we were comfortable," Armstrong said.
"We came in at halftime and made one or two changes in terms of the shape. Then when we went out in the second half we just killed off the game and kept the ball really well and played the game how it should be in that heat."
Armstrong said the entire team could be satisfied with their effort but reserved some special praise for Rufer and captain Louis Fenton.
"Alex Rufer was outstanding up front, led the line and linked up the play very well and obviously scored the goal. The defenders stood up to a lot of heavy challenges and Louis Fenton - who was captain for the day - was absolutely outstanding and never stopped all game."
Looking ahead to Sunday's match with Papua New Guinea - who fell 1-0 to New Caledonia in the late Group B game - Armstrong said Friday's experience will serve the group well.
"We probably won't change much. Having had our game and understanding how it's played here in the islands now a bit better, we'll have a few fresh legs in there and we'll be able to adapt a bit better."
New Zealand's next match is against hosts Papua New Guinea on Sunday at 5pm (NZ time) with LIVE coverage on Maori TV.