Radel Fazleev and Landon Welykholowa each had a pair of goals for the Hitmen, who lead the series 2-1, Adam Tambellini had a goal and two assists and Travis Sanheim added a single goal.
Jaedon Descheneau scored once and set up five more for the Ice, Jagger Dirk had two goals and two assists and Sam Reinhart had a goal and four assists. Zach Franko and Luke Philp also scored to round out Kootenay's offence.
Calgary's Chris Driedger made 25 saves for the win. Mackenzie Skapski allowed seven goals on 28 shots for the Ice.