Performed QA on Laars Boiler install. Spoke with Karen about the system and install. She asked if I could turn the temperature up on the domestic hot water. Adjusted the mixing valve to increase the temperature from 116 Degrees to about 121/122 Degrees. Inspected piping and checked gas piping for leaks. Reviewed programming and Dipswitch settings on the boiler. Completed checklist form in the system. No follow up is needed.