,
Did you know that even if your tankless water heater is installed inside your home, it can still be susceptible to freezing during cold weather?
Whether you're planning not to use your tankless water heater for a while or the forecast predicts freezing temperatures, it is crucial to take proactive steps to protect your unit and plumbing system.
Freezing can cause significant damage, leading to costly repairs and inconveniences.
In this article, we will explore the importance of winterizing your tankless water heater and provide you with essential tips to protect it from freezing during cold weather.
By implementing these preventive measures, you can ensure the longevity and reliability of your tankless water heater, even when not in use, and prevent any potential plumbing issues that may arise.
To prevent the failure of your unit, follow this step-by-step guide to learn how to winterize a tankless water heater properly.
Many modern tankless water heaters from manufacturers like Rheem, AO Smith, Rinnai, Noritz, Takagi, Bosch, Paloma, and others, incorporate advanced technology and freeze protection features, capable of safeguarding the system from freezing temperatures, even as low as -30°F or lower.
Note: The most effective way to prevent freezing during winter is by installing a tankless water heater in a heated room with wind-resistant features.
However, as the owner of a new tankless water heater, it is important not to solely rely on these features.
Why?
Because despite the presence of freeze protection features, all tankless water heaters rely on electric power, including the protection system (usually a heating element or sensor). In the event of a power outage, your tankless unit will fail. This was experienced by many people during the "arctic" winter at the end of 2017.
This is why it is crucial to properly winterize your tankless water heater and be prepared for cold days.
Note: Nearly every tankless heater manufacturer specifies that the unit should not be installed in areas where the temperature can reach 36°F or lower. Failure to take proper precautions, such as correct draining, may result in damages to the tankless unit and its components that will not be covered under warranty. Additionally, adding anti-freeze solution is not recommended as it can cause damage to the heater's components.
This is especially important if the tankless water heater is installed in locations such as cabins, garages, or if you will be absent for an extended period.
Yes, tankless water heaters can still freeze, albeit to a lesser extent, if certain precautions are not followed. The reason behind this lies in the fact that many modern tankless models come equipped with freeze protection systems, such as electric heaters.
These electric heaters are installed on the heat exchangers and other internal components, activating when the temperature drops below a specific threshold. This mechanism prevents freezing and potential damage to the unit.
In addition, some tankless models are designed to activate the system and heat a small amount of water periodically, effectively keeping it frost-free.
It is important to note that both of these systems rely on a consistent and uninterrupted power supply. Without power, the freeze protection features will be disabled.
Certain manufacturers also recommend the installation of a flue damper to minimize the entry of cold freezing air through the venting system, and insulating the exposed pipes is also advised.
Most models from reputable brands like Rheem, Takagi, Noritz, Rinnai, and others incorporate systems that protect the unit from freezing. Indoor models typically offer protection up to -22°F (assuming no direct wind exposure, also known as the wind-chill effect), while outdoor models provide protection up to -5°F.
One of the key steps in winterizing a tankless water heater is to drain and unplug the unit. By completely removing all water from the pipes, especially the heat exchanger, you can prevent any standing water inside the unit from freezing, expanding, and potentially causing damage.
So, how do you prepare a tankless water heater for winter?
Some manufacturers recommend using air compressors to blow short bursts of air through the inlet connection to ensure that no water remains inside the heater.
By following these steps, your tankless water heater will be free of water and fully winterized.
If your tankless water heater becomes frozen, it is crucial to address the issue promptly and take steps to unfreeze it. The accumulation of ice can cause damage to internal components, particularly those made of plastic, as well as sensors and electronics.
Here are the steps to thaw out your tankless water heater:
By following these detailed steps, you can effectively thaw out a frozen tankless water heater and address any potential issues caused by freezing. Remember to prioritize safety and seek professional assistance if you are uncertain or uncomfortable with performing these steps yourself.
While many tankless water heater manufacturers offer models with built-in protection against freezing, it is still advisable to winterize the unit, especially when away from home or during extended periods of inactivity. Unlike tank-type models, tankless water heaters require more attention and extra care due to their delicate features.
Understanding how to winterize a tankless water heater is crucial for preventing freezing and potential damage.
By following the appropriate steps to drain and protect the unit from cold weather, you can ensure its longevity and reliability.
However, if your tankless water heater does become frozen, it is essential to address the issue promptly and take the necessary steps to unfreeze and repair it.
By taking a proactive approach to winterization and addressing freezing issues, you can maintain optimal performance and enjoy uninterrupted hot water supply throughout the colder months.
During freezing temperatures, a tankless water heater may not produce hot water due to its built-in freeze protection feature or blocked/frozen pipes. The freeze protection feature is designed to prevent damage to the unit by shutting off water flow when freezing conditions are detected. Blocked or frozen pipes can also restrict water flow, resulting in a lack of hot water. Once the freezing conditions subside or the pipes thaw, the tankless water heater should resume normal operation. If hot water issues persist, seeking professional assistance is recommended.
Outdoor tankless water heaters are more prone to freezing due to their exposure to the elements. However, many outdoor models have built-in freeze protection features such as electric heating elements or recirculation systems. Additionally, using a recess box, which is a protective enclosure installed around the unit, can provide extra insulation and shielding against freezing temperatures.
You can cover your tankless water heater to provide additional protection against freezing and the elements. However, it's important to use a breathable cover that allows proper airflow and does not obstruct ventilation. Follow the manufacturer's recommendations and guidelines for covering your specific tankless water heater model.