Bosch GL2.5 Ariston Point-of-use electric water heater (2.5 gallon)

- Item #: BCI308112

We still have product details, accessories, replacement parts and reviews below, scroll down to see them!

Questions about Bosch GL2.5?

Contact us for advice or more details. Our product specialists are here to help.

Bosch GL2.5 Ariston Point-of-use electric water heater (2.5 gallon)

Installing an Ariston GL2.5 electric mini-tank water heater under the sink puts hot water right where you need it; at the point-of-use. Lightweight and compact, this heater is also available in two other space-saving sizes: 4, and 6+ gallons. These heaters are aesthetic on the outside, glass-lined on the inside, and offer superior insulation for higher efficiency.

  • 6-year warranty on tank
  • Glass-lined tank for longer life
  • Mounts on wall or floor
  • Temperature/pressure relief valve included
  • All models plug into standard 110 volt outlet
  • Meets ASHRAE 90.1 Standard

Additional Bosch Links

Our SKU: Bosch GL2.5

This product is listed under the following manufacturer number(s):

  • Bosch 16526154*

*Denotes a finish or option that has been discontinued

Bosch GL2.5 Product Specifications

Specification Sheet
Depth 10.25
Direct Vent No
Electronic Ignition Type Yes
Fuel Type Electric
Hardwired No
Height 14
Ignition Type Electronic
Indoor Installation Yes
Manifolding No
Maximum Temperature 145
Outdoor Installation No
Plug In Yes
Temperature (Min) 65 Degree F
Voltage 120
Water Connection 1/2"
Width 14

Installation Resource Center

Whether you are installing the product yourself or hiring a professional, our installation Resource Center has everything you need to get your project done. Visit the Installation Resource Center to get started.

Bosch GL2.5 Reviews

Rated 4 out of 5 by from Good small water heater At my house, the central water heater is too distant to get hot water quickly in the kitchen. I installed this heater under the kitchen sink and connected its inlet to the HOT water line so the tank would be refilled with warm water if I depleted the reserve. The heater works well, but I had to set the thermostat all the way up. There is an inner cover behind the front cover that is not mentioned in the instructions; I had to figure out how to get the inner cover back on. (It would have been simple to make a small hole in the inner cover to adjust the thermostat without removing the cover.) The heater is totally silent in operation. The insulation is very good, and the heater retains heat well and recovers quickly. The main heat loss is from the relief valve. The initial water is very hot (about 150°F after resetting the thermostat), although it moderates after I draw about a litre of water. Still, it is adequate and fulfils my needs. Tip: Whilst searching for a suitable drip pan, I found a rectangular cake pan at Wal-Mart that was ideal.
Date published: 2009-12-03
Rated 5 out of 5 by from Just what we needed The Bosch Gl 2.5 fit easily under the sink in a rustic(old barn) clubhouse. It will be easy to drain during unheated winter months. For the first time in the 30 years that I have lived in this community we have hot water in the kitchen.
Date published: 2008-07-29
Rated 5 out of 5 by from Affordable solution The hot water in my store was hooked up through the oil fired hot water heater of the store next door and was a constant source of tension between neighbors. This little unit was just the right size for our needs and installed easily. The unit is flexible, easily adjusting to my needs. The price was right and the free shipping helped seal the deal. Thanks.
Date published: 2008-11-07
Rated 4 out of 5 by from Good Little Workhorse For quick, hot water in those places with no hot water or are too far away from the regular hot water heater. Two and a half gallon tank is enough to wash your hands, or rinse some dishes, or wash the dog, etc, etc, etc. If you have a regular electrical outlet and a water source, you can have hot water!
Date published: 2009-01-26
Rated 5 out of 5 by from Works well The unit was more challenging to install than anticipated, but our plumber figured it out eventually. The unit is much bulkier than anticipated, so we have to replace the sink unit to accommodate it. We are also a bit challenged to regulate the water temperature which comes out too hot currently. However, it seems to be an excellent and cost effective solution for our needs and appears to work well in our commercial building. We will buy more of these heaters for other locations.
Date published: 2009-03-20
Rated 5 out of 5 by from Better than what I had expected The BoschGL2.5 fits the bill as to my desire for instant hot water at the kitchen sink. No more letting the water run until it gets hot. With this unit under the sink I have all the hot water I need right now! Your shipping time was exceptionally fast. I was surprised to see the water heater arrive so quickly. Thank You1
Date published: 2009-07-28
Rated 5 out of 5 by from works well Easy to install,works well.I wish we had it in all bathrooms.
Date published: 2009-07-25
Rated 5 out of 5 by from very pleased! I was very pleased with the price, shipping and ,of course the product. It works great and we couldn't be happpier with our experience with your company.Thanks,
Date published: 2009-07-30
  • I am considering using this heater for my portable concession sink which is used in an outdoor environment. Will this heater be suitable for this ? Thanks

    A. The Bosch GL2.5 will work perfect and it will provide a max temp of 145° F.

  • I have Jack and Jill side by side sinks in the same bathroom. Can I use one heater with two Ts for the input and output to feed both faucets in the bathroom?

    A. The Bosch GL2.5 is only meant for one faucet. each faucet should have their own dedicated unit as it will not product enough heat to run both.

Buy the Bosch GL2.5 at Research Bosch GL2.5 online. Find Bosch GL2.5 features and specifications. Get the best deal by comparing the Bosch GL2.5 today.

Recently viewed items
× Shipping Rates & Methods

The cost to ship items varies by item, shipment and shipping option.

Free Ground Shipping on Orders Over $49 *

Standard ground shipping transit time is 5-7 business days.

Free Freight Shipping on Orders Over $1500 *

Curb side delivery (also called freight or "LTL" shipping) is reserved for large, heavy, or oversized items like chandeliers, bathtubs, shower doors, etc. Items are palletized and loaded onto a large truck for shipment, and delivered to your curb by scheduled appointment. Transit time is 7-10 business days.

* For exact shipping costs, add the product(s) to your cart and enter your zip code. All offers pertain to the lower 48 states and do not include deliveries to Alaska, Hawaii or Canada.

Learn more about shipping rates and policies