All homes built within the last 7 years on Ontario have a device that is welded above the hot water tank called a thermostatic mixing valve. It further reduces the water temp from your tank by adding a bigger mix of cold water to the taps. We just had to replace ours, as it broke. You can get them at Home depot($60-$90) depending on the brand. We got the Honeywell at $88 and it works great. You will need someone who can weld it to the pipes above the water heater in 3 different places. My hubby is handy, so he did it, but if not, call a plumber.