To protect your Rinnai water heater from freezing in cold weather, ensure it is well-insulated. Use a water heater blanket or insulation kit, available at most home improvement stores. Additionally, keep the heater in a warm area and avoid installing it in places prone to freezing. If the heater is not in use, drain all water to prevent freezing and potential damage. Regular maintenance checks can also help identify any issues early on.
If you need professional assistance, the experts at 5 Star Best Plumbing are always ready to help with any water heater-related issues, including water heater replacement.