I have a room in my apartment that can sometimes get around 40°F (4°C), and that's where my new tankless water heater is stored. Should I take any special precautions to keep my pipes from freezing or to avoid any other weird problems with my water heater? I live in the US Midwest in a second-floor apartment.
Other details from the comments:
- Model: Rheem RTEX-24
- The room is on an exterior wall, some of the plumbing goes through an exterior wall, and the water heater is about 3 feet from an exterior wall.