Chimney Sweep for Gas Boiler?

I’ve been living in a brownstone I purchased two years ago. 4 years ago it was gut renovated with new HVAC everything and heat is from gas boiler. I’ve been getting calls from chimney sweeps and honestly didn’t even know I’d need such a service for this type of system. Do I? If so, how often? What do they clean? Forgive my ignorance and I see many old posts asking about sweeps, but none specifically addressing these questions. THANKS

By Brooklyn Willy |