Hartman scored his second of the night 57 seconds later on a one-timer to make it 2-1 at 12:24. Fiala led a 3-on-1 and passed to Hartman for his third goal of the season.
"Today, I was just thinking about playing the right way," Fiala said. "Yeah, I mean just a simple game. Don't think about too much, scoring goals or whatever. We got chances today, you know? If you stop thinking, sometimes it works. And today, obviously it did."
Calle Jarnkrok increased the lead to 3-1 at 6:37 of the third period on a 2-on-1 with Kyle Turris.
"I think we're experienced enough now through last year and the tight, one-goal games we've had this year that we know how we have to play," Turris said. "You can't let up offensively, but at the same time you have to be smart and make good decisions to play strong defensively."
Viktor Arvidsson was awarded an empty-net goal at 17:42 to make it 4-1 after he was taken down by Golden Knights defenseman Nick Holden while trying to score. It was Arvidsson's eighth goal.