The recommended water temperature setting from mixing valve to the domestic water system in the combination heating systems that employ oil-fired water heaters for heating potable water and for space heating is:
A、 110 degrees Fahrenheit
B、 120 degrees Fahrenheit to 130 degrees Fahrenheit
C、 140 degrees Fahrenheit to 150 degrees Fahrenheit
D、 180 degrees Fahrenheit
发布时间：2025-07-19 08:59:17
