An unproperly set recirculation decreases your water heater components lifetime. To avoid shortening lifetime and energy wasting, please set it properly.
NOTICE: Bad settings for recirculation leads to big energy consumption.
A permanent recirculation (H24) at 0.5gpm usually drags an average 800W meaning almost 7200kWh used per year only for this.
Financially speaking, that's a 1000$ bill at the end of the year (at 0.14$/kWh).