Not sure changing the temp does anything, but if it works...
The higher the demand for hot water, the faster it heats. Running only the shower it will take about 2 -2.5 min to get hot water. If you turn on both hot faucets and the shower you get hot water in 30 seconds because then the heater shifts into high demand/high heat mode. The sink faucets run at about 1 gal per minute. So worst case, you're using 1.5 gallons to get hot water. So turn on the faucets and by the time you get in your birthday suit, you have hot water.
Removing flow restrictors probably has a similar effect, creating higher demand, higher heat mode. Not sure what effect it has on the water usage.
|