The jsm40 laser (tube) should not be much louder than the 3060U. It is difficult to know what is causing it since I don't know what sound you are hearing, but possibly the PSU.
Providing the flow rate is within spec and you aren't seeing any temperature rise (monitor the outlet) it isn't too important.
40-45f is on the cool side but ok, I actually prefer to run warmer since the differential between room temp and internal temp can have an effect on glass stress. Keep the output temp under 70f and you'll be fine.