Heating a bunker, is that even possible?

Hello,

a difficult starting position:

[*]Reinforced concrete walls with 4.5 meters
[*]Vapor barrier, Rockwool 15 cm, plasterboard 12.5 mm

Then the room is also not modest in size with 60 sqm floor area at 6x10 meters and a ceiling height of 5 meters.

My concerns are, is underfloor heating and a single gas fireplace with 8 kW thermal output enough here?

In addition, I am worried about the humidity. I could install 2 fans with a diameter of 12 cm and control them by time, for example to operate them at night.

But... does all that help? Can a room like that be heated at all?

My concerns are, is a floor heating system and a single gas fireplace with 8kw condensing heat output sufficient here?

It's all a matter of design (regarding the floor heating). What kind of access is there? Pressure-tight atomic explosion door or what is installed?

Are there "windows"/ fresh air?

Google "Bunkersiedlung Kevelaer". It's a whole settlement in former munitions bunkers.

Entrances are all normal doors ... The room has a huge window, about 5 x 5 meters, and honestly, once a bomb from an airplane flew in through it.

Tell me more, I find the project super exciting. Where? Why? There was once a family on TV who turned a bunker into a residential house, maybe you can get a contact from somewhere?!

There was a family on TV who turned a bunker into a residential house, maybe you can get a contact from somewhere?!

As already written above. There is a whole settlement (20 or 30? bunkers) in Kevalar