Maybe i missed your point if you meant that aerosolization will occur readily simply when opening a faucet … ?

Otherwise - - documentation :
en.m.wikipedia.org/wiki/Legionella

Temperature affects the survival of Legionella as follows : [3]

• Above 70 °C (158 °F) – Legionella dies almost instantly
• At 60 °C (140 °F) – 90% die in 2 minutes (Decimal reduction time (D) = 2 minutes)

i would not expect much aerosolization if heated slowly … and you did not provide any documentation.