I am no expert in washing but this is what I have heard from Electrolux best expert:
Wool can stand really high temperature in water if is not tumbeled or stired. The problem is the movment, not the temperature. In modern washing machines for hoseholds there is a program for wool wash 30 degree Celcius. You can wash a suite there without shrinking. The problem is to get it ironed and flat after the washing. For that you need professional help.
BUT! This work with clothes that are 100 % sewn and without glue inside. Today even the most exclusive brands cut costs and use glue for the inside of their jackets. You must be absolutely sure, otherwise the cloth may get boubles and wrinkles. I should not even trust Zegna.
The method Electrolux or Wascator Lagoon (earlier called Aqua Cleen) is used by some dry cleaners. They can be hard to find. In a city of Stockholms size (over 1 million) I´ve found one washer so far, but there should be a few more.
My experience from leaving the suit to a professional washer is: (Remember: It is a suit from the 1950´s, really dirty, with strong odour and worn)
1. Now it is really clean and the ugly smell is totally gone. No shrinking.
2. But also small holes and wear appeard. It had earlier (after dry clean twice) been hidden and fixed under the dirt, but now I have to repair some small damages with a yarn.