Mine has gone up to 120 in the spring many times and I had to open a window. ! Once 150 degrees is reached the collection of extra heat is easy to transfer to another area. I would think that several radiators could transfer the heated water fast!. Even baseboad heaters would work!
I enjoy fishing ,gardening and a solar greenhouse! carpet installation repair and sales for over 45 years! I am the inventor of the Bobber With A Brain - Fishing Bobber!