Bottom Line! I have a run of PEX in my attic that freezes when the outdoor temps falls to about 15 degrees. Once my attic warms up (after a few hours the next day) the pipe thaw. So far no leaks.
During maintenance you’ll want to be assured the top of the vent is kept open. A blocked vent can be caused by leaves, dead animals and ice dams (in very cold climates). Another “not-so-common” way
Now that we are slowly getting into the heating season, you (and your family and friends) will be using natural and propane gas appliances more often. If you should smell gas, here’s a handy (and safe) method of locating the fittings or joints that might be the problem.
Gary Smith says the new water heaters have to accommodate the higher insulation r-values (thermal resistance), making the water heater taller and wider.
Nothing beats a nice clean cool drink of water. However, if you own a tankless water heater, you’ll want to keep the heat exchanger free of lime and scale. You should flush it annually. Here are some basic steps. The pump and hoses will cost less than $100.