Bosch Ariston GL2.5 review – Facts you should know

The Bosch Ariston GL2.5 is part of a series of tank water heaters that come in range of storage capacities. This tank water heater can also be deployed in a variety of situations.

This tank water heater is also readily available online. Most importantly, this also allows you to compare prices with no hassle of travelling.

With this, I provide a summary of this tank water heater below.

Benefits of owning a Bosch Ariston GL2.5 water heater

Instantaneous hot water

This Bosch water heater can store up to 2.75 gallons of hot water which is sufficient for supplying instantaneous hot water to a single sink faucet. The operating temperature range of this unit is 65 Degrees Fahrenheit to 145 Degrees Fahrenheit.

Easy installation

No additional hard wiring is required to power your unit. The Bosch Ariston GL2.5 has a 1500-watt heating element and can be plugged into any 120V standard outlet.


The Bosch Arison GL2.5 has a small and compact design; Length (L) x Width (W) x Height (H) 10.5L x 14W x 14H Inches and weigh a total of 16 pounds. In fact it is even small enough to be installed under your sink supplying your faucet with hot water.

Image from Amazon

Longer lifespan

The glass-lined inner tank gives the Bosch Ariston GL2.5 a longer lifespan as compared to other models.

Better efficiency

The insulation of the tank for the Bosch Ariston GL2.5 also confers better efficiency of this heater with better insulation.

Versatility in deployment   

This unit can be deployed independently or as a part of a larger heating system.

These series are also available in two other sizes; Bosch Ariston GL4 and Bosch Ariston GL6 allowing you a choice to decide which is best for you. Here is the link by Amazon for these products; Bosch Ariston GL4 and Bosch Ariston GL6

Customer Reviews on Bosch Ariston GL2.5

I have read many customer reviews for Bosch Ariston GL2.5 and have summarised them below.

The Pros 🙂

Most of the comments for this Bosch water heater are positive; ranging from its space-saving capability, ability to be installed under the sink or kitchen cabinet, thus decreasing the distance of the water heater from your faucet and giving you almost instant hot water. Other positives mentioned by consumers include the thermostat for this unit that is able to heat the water to the set temperature with no fear of scalding while adjustment and its simplicity in setting up.

Consumers have also reported no sudden spikes in electrical usage after installation of this unit so dispelling the common myth that installing a tank water heater at home will increase your utility bills. So ultimately you have to determine which heated water system is best for you.

The Cons 🙁

However there are also some negatives about the Bosch Ariston GL2.5 that I have to highlight. Like all tank water heaters, it will be good to have a drain pan below your unit to prevent any leakage. The thermostat that comes with this unit is installed internally. To gain access to it for adjustment of temperature, you have to remove a cover plate and a few screws making it a possibly troublesome task especially if you need to do it often.

A dedicated 120V power outlet is also required for this unit; this heater requires 1500 watts, and it is not advisable to share that power point with your dishwasher, microwave or toaster to prevent any short circuit from happening in your household.

Other shortcomings observed are actually inherent for your region; if your regional water supply is high in minerals, you might need to clean out your heating element more often. Like all tank water heaters, sacrificial anodes will also need to be replaced to prevent your tanks from rusting out. All these will probably add to your maintenance costs so it is important that your supplier covers these aspects in the warranty.

How does the Bosch Ariston GL2.5 rank on popular websites?


67 customers at Amazon gave Bosch Ariston GL2.5 an average of 4.1/5 stars. Out of 67 customers, 38 gave it a maximum of 5.0/5 stars.


63 customers at Nextag gave Bosch Ariston GL2.5 an average of 4.3/5 stars. Out of 63 customers, 38 gave it a maximum of 5.0/5 stars.

Home Depot

36 customers at Home Depot gave Bosch Ariston GL2.5 an average of 4.4/5 stars. Out of 36 customers, 22 gave it a maximum of 5.0/5 stars.


3 customers at Buzzillions gave Bosch Ariston GL2.5 an average of 3.3/5 stars with no maximum of 5.0/5 stars.

Warranty Information

There is a six-year limited warranty on the inner tank and a one year warranty on any heater component other than the inner tank.

Best Deals for Bosch Ariston GL2.5

As I was doing my research, I have discovered that the best place to purchase the Bosch Ariston GL2.5 is Amazon. There is stock readily available and at the lowest prices as compared to other sites.

Here is the link for you to check out this great product: Bosch Ariston GL2.5 Best Deals

(Download the Specifications Sheet for Bosch Ariston GL2.5 here)


(Last Updated 2nd November 2014)

Wilson Yeo

I am the admin of Green Energy Helps and I possess a keen interest in how green energy and how leading a green lifestyle can help to reduce our individual carbon footprints. From my website, I will provide useful information about green energy and tips that allow you to leave the green way. Besides that, I will provide unbiased reviews about green products and whether they are suitable for you!

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