Good and thanks for the time. 1 month ago I have a stately 50 liters dual hot water tank is in electric mode lower load and I have two problems: with the thermostat set to maximum, the shower does not exceed 8 minutes of hot water (in the kitchen also lasts that time). The other problem is the noise it makes when it heats. I have to purge him almost every day to stop him; but the third time it turns on the screech returns.