Reason #2 - Efficiency
Why is radiant heat more efficient then the competition when it comes to heating emitters?
Firstly, hydronic radiant runs on a lower water temperature then all other emitters (e.g. baseboard, radiators, fan coils, etc). When teating water to 100*F compared to the conventional 180*F- what different heaters are typically set to- and you save money without a doubt!
Secondly, radiant floor heating allows you to use all the wall space you paid for when building your home. There will be no issue in your mind of "where do I place a bookshelf, beds, or couches without blocking the heat from working?"
Lastly, radiant floor heating, when installed in a low-mass concrete or wood floor, will heat up and cool down rapidly so no extra BTU's go to waste by heating up unnecessary mass.