On 12/24/2016 10:07 AM, DerbyBorn wrote:
Are immersion heaters as efficient as they could be? Could the tubular
element be improved upon - or doesn't it matter?


pedant
If you put fins on the cladding the heat transfer would improve, and the
resistive element would run a bit cooler. That might improve its life?
Also, a cooler element would have lower resistance, hence slightly
higher current and output.
/pedant