The former Lyon manager replaced Tim Sherwood on a three-and-a-half-year deal earlier this month.
Guzan, 31, was speaking to AVTV ahead of Garde’s second game in charge at Everton on Saturday afternoon, when Villa will be looking to pick up their first Premier League win since the 1-0 opening day victory over Bournemouth.
A dismal start to the campaign under the now departed Tim Sherwood sees the club sitting bottom of the table with just five points from 12 games, but the new manager’s arrival has led to renewed optimism about their survival chances
The former Lyon boss’ first match at the helm against Manchester City prior to the international break saw his side hold the top-flight leaders to a 0-0 draw at home to end a seven-game losing streak in the league, and the team now goes into the Toffees clash after getting the chance to work with him for the first time at length over the past fortnight.
Guzan has not spent as much time with the ex-Arsenal midfielder as some of his teammates after being on US national team duty, but the American custodian has certainly noticed a difference around the club in recent weeks.
“It’s been really good,” he told AVTV. “Obviously he brings a bit of a calmness with his demeanour in terms of in the dressing room and on the side of the pitch.
“He gives guys confidence to go and play and express themselves and I think that’s important. Obviously the result against Manchester City was a positive one and hopefully something we can build on.”
Guzan has endured a largely disappointing 2015 due to a string of costly errors creeping into his game, but he seemed to be influenced by the new manager effect against City after putting in a stellar performance to help earn his side a precious point.
However, the former Chivas USA stopper insists that much of the credit for the result has to go to centre-back partners Micah Richards and Ciaran Clark for enduring a second-half onslaught from Manuel Pellegrini’s man to preserve the clean sheet.
“They were fantastic,” added Guzan. “Every week, it’s hard to fault them because they throw their bodies on the line for tackles, for balls in the air, second balls – it’s not always an easy task.
“And so for them, especially playing a team like Manchester City, I thought they were brilliant.”
Whether Guzan and the Villa defence will have to produce more heroics at Goodison Park this weekend, though, remains to be seen.