So how does radiation heat work in other places?

Like this? This has no mass either really.

https://images.homedepot.ca/productimages/p_1001318862.jpg?product-images=l

Same way radiation heat works from the sun.

In less fair weather places you could do district heat. Use a data center to provide heat for a few Condo complexes or something.

Yeah a big red shutoff should be the cutoff to the electricity, water, air, oil, or whatever else it’s meant to stop.