sorry i'll explain a little better.
the NX setup has a switch in it that will turn off the heater when the bottle is achieved it's ideal pressure. it will turn back on if the pressure starts to drop.
ZEX's setup just turns on for (give or take) 5 minutes, and off for 2 minutes, and back on. it doesnt have the switch in it like the NX fire and ice heater.
i dont like zex myself, but a purge is a purge. i thought the bottle heater would be fine, and it is, if you want to check the bottle pressure constantly.
