Watch the full video of the funeral in the video player above.

NORTH HAVEN, Conn. (WTNH) — The North Haven community continues to mourn the loss of beloved firefighter Matthias Wirtz, who died in the line of duty the day after Christmas.

A funeral service has held for Wirtz on Monday at St. Elizabeth of Trinity Parish at St. Barnabas Church. He was honored with a line-of-duty death funeral protocol.

Visiting hours were held Monday for Wirtz, with hundreds coming to pay their respects.

“Working on assignment, driving an engine and pumping the engine, something he’s always wanted to do,” Chief Paul Januszewski said. “He came to me a couple of months back when the assignment opened up, so I’m so happy I could fulfill his wishes.”

Fire officials said the 46-year-old was battling a four-family house fire on Quinnipiac Avenue on Dec. 26 when he collapsed outside the building while operating water lines. Medical care was provided on the scene before he was taken to Yale New Haven Hospital with life-threatening injuries. He was later pronounced dead at the hospital.

The state’s chief medical examiner determined that he died from heart disease.

Januszewski said Wirtz was “actively working under extreme environmental conditions to protect the lives of the occupants and fellow members of his crew inside the building.”

Wirtz was a 22-year veteran of the North Haven Fire Department and was among those who responded to New York City on 9/11. He’s remembered for his big smile, generosity and unwavering devotion.

“He was everybody’s friend. He was a great person. He was a great family man,” Januszewski said. “He would do anything for anybody.”

Wirtz is survived by his mother, wife and three stepchildren.

Among those who paid their respects Monday were Connecticut Attorney General William Tong.

“I just had a few minutes with his wife, Barb, and his mom, and his stepchildren, and during the holidays, it really underscores how much they have lost, and how much they have given,” he said. “Families in law enforcement do this together.”

Januszewski said that the condolences have been overwhelming. He estimates that firefighters from around the country will attend the funeral.

“It’s a reminder that the fire service is tight,” he said. “It doesn’t matter how far away you are. It’s the same job throughout the country, so when we all gather together for a purpose like this, you get to see some people haven’t seen before and make new friends.”

North Haven Public Schools were closed Tuesday. The department used the North Haven High School campus and district school buses to take people to and from the funeral.