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In Honor of Yoshiaki Arata

This paper seeks to make readers aware that Arata and Zhang (A&Z) in 2007/8 demonstrated operation of an autonomous fusion “heater”. The heater generated a steady outflow flow of heat at slightly above room temperature throughout a run lasting hundreds of hours. The steady nuclear heat occurred after a brief burst of chemical heat during D2 absorption. No other energy input was present. The paper also seeks to make readers aware that in 2005 A&Z demonstrated continuous fusion heat at 191°C in a gas loaded reactor which was initially maintained at 141°C by an electrical heater. It is estimated that 25% of the heat delivered to the room was fusion energy and 75% was electrical heater energy. The catalyst temperature was high enough for practical generation of electrical power.