How To Keep An Outdoor Tankless Water Heater From Freezing

Tankless water heaters are becoming increasingly popular due to their energy efficiency and space-saving design. However, if you live in an area with cold winters, you need to take steps to prevent your outdoor tankless water heater from freezing. Here are some essential aspects to consider:

1. Insulation

Insulation is the most important factor in preventing your tankless water heater from freezing. Make sure the unit is well-insulated, with at least 2 inches of insulation around the sides and top. You can use foam insulation or fiberglass insulation, but make sure it is rated for outdoor use.

2. Location

The location of your tankless water heater is also important. If possible, install the unit in a sheltered location that is not exposed to the wind. You can also build a small enclosure around the unit to provide additional protection.

3. Drain Down

If you are going to be away from your home for an extended period of time during the winter, it is a good idea to drain down your tankless water heater. This will prevent the water from freezing and damaging the unit. To drain down the unit, simply turn off the water supply and open the drain valve. Allow all of the water to drain out of the unit, then close the drain valve and turn the water supply back on.

4. Heat Trace

A heat trace is a heating cable that can be wrapped around the water pipes and tankless water heater. The heat trace will keep the pipes and unit warm, preventing them from freezing. Heat traces are available at most hardware stores.

5. Antifreeze

Antifreeze can be added to the water supply to help prevent it from freezing. However, it is important to use a non-toxic antifreeze that is specifically designed for use in tankless water heaters. Avoid using automotive antifreeze, as it can damage the unit.

6. Regular Maintenance

Regular maintenance is essential for keeping your tankless water heater in good working condition. This includes inspecting the unit for leaks and corrosion, and cleaning the sediment filter. You should also have the unit serviced by a qualified technician once a year.

7. Warranty

Most tankless water heaters come with a warranty. If your unit freezes and is damaged, you may be able to file a claim with the manufacturer. However, it is important to read the warranty carefully to see what is covered.

By following these steps, you can help prevent your outdoor tankless water heater from freezing. This will help to ensure that you have hot water all winter long.