Abby Stonehouse scored two third-period goals.
It will be Janecke's fourth IIHF Women's World Championship appearance.
Josh Fleming made 35 saves in the victory.
Morgan Stickney notched her second career shutout in the road win.
"Comfortable is not the word. I would say excited ... I would say whatever the word is when you welcome a challenge."
"We need to start with that sort of back-against-the-wall mentality."