It s smart to insulate water supply piping exposed to freezing temp.
Hot water heater in attic freezing weather.
Once my attic warms up after a few hours the next day the pipe thaw.
The greatest freezing danger to a tankless hot water heater is standing water that expands within the unit itself.
The heaters themselves need no protection from freezing weather as long as the electricity and gas are working.
By keeping the unit warm most freezing incidents can be prevented.
Now a secondary line of reasoning for placing a water heater in the attic is the high temperatures that occur in an attic particularly during the summer months.
It is more common however with outdoor installations.
There are no manufacturer guarantees it won t fail.
I have a run of pex in my attic that freezes when the outdoor temps falls to about 15 degrees.
Your attic can easily reach temperatures of 120 140 degrees which is optimum for keeping the water in your tank sufficiently hot without using any energy.
Routine maintenance should be performed once a year on your water heater and going into the attic is cumbersome and can either be really hot in the summer or really cold in the winter keeping an eye on the water heater on a daily basis is not as easy either adjusting the temperature is harder.
If there is a power shortage the heater might suffer from frozen water inside the.
Most indoor and outdoor tankless water heaters have built in freeze protection against temporary winter temperatures ranging from 5 degrees fahrenheit to 22 degrees fahrenheit.
It senses temperature change smartly and then takes measures automatically to protect the machine before it gets too cold.
Still the tankless hot water heater can freeze if certain precautions are not taken when the temperatures drop below a certain level.
There is an electric pump next to the water heater that moves the hot water through the pipes delivering hot water quickly to most any faucet.
This danger can apply to indoor models that are placed on an exterior wall.
So far no leaks.
The hot water in the cold water pipe is due to the hot attic.
Exposed pipes both cold water and hot water in areas like a crawl space basement or attic can be covered with foam pipe insulation sleeves or wrapped with pipe insulation tape.
The flow rate of it is 7 5 gallons per minute.
The weather has cooled significantly here in socal and i can tell the difference.
