Installing an Ariston 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 available in three space-saving sizes: 2.5, 4 AND 8 GALLONS. These heaters are aesthetic on the outside, glass-lined on the inside, and offer superior insulation for higher efficiency. Provides endless hot water for 1 sink to 1 sink and a shower at a time. Mounts on wall or floor. Elegant egronomic Italian designed housing. Meets ASHRAE 90.1 standards. Click Here for Ariston GL Spec Sheet