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Bosch 660EFONG Review


Bosch 660EFONG Review

Bosch 660EFONG Pros and Cons

The Pros

The Bosch 660EFONG is an Outdoor Natural Gas tankless water heater that can produce up to 6.6 Gallons per Minute. This particular model by Bosch has 83% thermal efficiency and includes freeze protection. This energy efficient tankless water heater is ideal for small and mid-sized homes.

The Cons

While the Bosch 660EFONG is great for small or mid-sized homes, it may not be enough GPM for larger homes or homes that have a high usage of continuous hot water. You may need a larger tankless water heater than the Bosch 660EFONG to fully provide the necessary water output for your home.


The Bosch 660EFONG is a great value for what it provides. There have been some great reviews on people who have owned this tankless water heater and they highly recommend it. I would recommend the Bosch 660EFONG to anyone with a small or mid-sized home.

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Bosch 660EFONG Review

About the Manufacturer

Bosch was founded in 1885 and is one of the leaders in technology. Bosch has made it their goal to make products that will enhance our everyday lives. Bosch is extremely innovative and stand by their products. The Bosch 660EFONG is another great example of a quality product they make.


There are tons of great features and benefits to the Bosch 660EFONG and is very east to install. This unit is eligible for Federal Tax Credits and will save you a lot on your monthly energy bills because of it getting up to 83% thermal efficiency which is awesome.

Here is a list of some additional features:

- Up to 6.6 Gallons per Minute

- 140,000 BTU

- Minimum activation flow rate of 0.5 gallons per minute

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Where to buy the Bosch 660EFONG

You can purchase the Bosch 660EFONG at many retailers or online stores. I have researched and found that tankless water heaters are typically more inexpensive on Amazon than other sources. On Amazon you may even have the option to purchase used to save some money,

Click Here to check prices on Amazon.