Features:
Now the GWH 635ES and ESO can cascade! Simply link two new models together with a cable (part number TANKLESS LINK) and double your volume. Getting an endless supply of hot water at a luxurious flow rate (over 12 gallons per minute) has never been easier.

Download the Cascading Tankless Link Manual [PDF].

Note: Models with this feature are labeled on a sticker on the outside of the packaging reading “This model suitable for cascading.”

Now you can install your tankless water heater outdoors!

Built in freeze protection to 5ºF. Eliminate the need for vent pipe and free up valuable space in your home.

The attractive sleek design of the ProTankless™ GWH 635 ESO model will complement any house style and color. And with an efficiency rating of 87%, the ability to supply two showers running simultaneously, and a digital temperature control, your customers will be all smiles with their new Bosch water heater.

• 87% efficiency rating
• Delivers over 6 gallons per minute, enough to run two showers* at once

*each shower = 2.5 gpm at a 50ºF rise.

 read more about the tax credit...