I studied at Rensselaer Polytechnic in New York and they have a campus-wide steam system. There are tunnels below the ground connecting every building. It is somewhat common to see in that region.

pfSense is great!!! I bought a Netgate router which comes with pfSense Plus.

OP, consider buying a Netgate router if you want no hassle, or if you’re up for installing an OS then you can put pfSense on a custom platform like ZimaBoard or Protectli.