It’s getting hot in here!

The smokin’ FDNY employees featured in the department’s new “Calendar of Heroes” were heating things up as they offered selfies and signatures to customers at a promotional event on “Giving Tuesday.”

The 24 firefighters and other workers starring in the department’s 2026 men’s and women’s calendars were all smiles — and muscles — as they greeted excited fans at the Fire Zone gift shop in Midtown Manhattan.

“I mean, look at this! It’s pretty amazing,” said California resident Jennifer Holmes, who was visiting the city for her birthday and stopped by.

“I always have such respect for firemen. … When I saw they were doing the event, we wanted to support them,” Holmes told The Post after posing with the men’s cover model.

Event-goers were able to purchase the ca

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