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

- Item #: BCI308112

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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

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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 "Fantastic Long Overdue" Finally the plumber came and installed the 2.5 gal. heater under my kitchen's triple sink which was a piece of cake for him. Not one complaint from the plumber upon install. I decided to connect its inlet to the COLD water line as to not defeat the purpose of saving $$. I did have the plumber to increase the thermostat to high since I felt the inlet water cooled the temp too quick set on the default temp and I haven't been without hot water since. It's wonderful having instant hot water for a pot or two, etc. The gas water heater on the far side of the house is still used for the dishwasher and I'm not concerned with wasting water and power/gas to heat up the inlet water supply after washing a dish or two. This heater performs as advertised and also has the best price with free shipping on the Internet and delivered quickly. I still need to purchase a rectangular cake pan to be used as my drip pan. Men, Mother's Day is around the corner, surprise that wife, mother or both with this gift and you will not regret it. I regret not having my husband/plumber to install this useful heater prior to his death years ago. I didn't mind providing this feedback as I used previous comments as a determining factor to make my purchase of this Bosch water heater. Truth is I could actually use another one of these in a vanity area. Thank you,
Date published: 2012-03-03
Rated 5 out of 5 by from Great product Have large home and would take 10 minutes to get hot water to my wifes sink in her bathroom Had a circlating pump installed on hot water but seemed to be very costly about $40.00 a mouth .Installed the Ariston Bosch GL2.5 heater and couldnt be happier.Hot water and cheap to operate..
Date published: 2011-06-19
Rated 4 out of 5 by from Very cost efficent.
Date published: 2011-06-14
Rated 4 out of 5 by from Great Product Quick and easy to install. Not a big issue but the thermostat adjustment, would be nice if it actually had temperature settings on dial.
Date published: 2011-05-20
Rated 5 out of 5 by from perfect fit Unit delivered in timely manner. Heater fit perfectly in my under sink application. Unit works as speced. good price. SATISFIED. highly recommend.
Date published: 2011-05-14
Rated 5 out of 5 by from Great unit - Great price I received my unit within a week. It was a straight forward install. Love the hot water without the five minute wait that I had. One problem - the wife is unhappy that I did not install trhis unit a long time ago. No question I will recommend this unit and I will come back if I need something else.
Date published: 2011-05-05
Rated 4 out of 5 by from Tankless water heater I installed this in my garage for a source of hot water. So far I am pleased with this 2.5 gal hot water heater. It was very easy to install and plug into a regular outlet. My only concern is making sure that I diconnect it this winter so that it will not freeze (unheated garage).
Date published: 2011-05-02
  • 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.

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