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.”

Bosch ProTankless™ GWH 635 ES

Powerful enough to supply two showers* running simultaneously!

Our most powerful offering. Certainly the engineers at Bosch have outdone themselves — the beauty of this unit is in its simplicity. The 635ES requires minimal tools to install or maintain, however, a manometer is required to verify gas pressure and a combustion gas analyzer may be needed as well in certain applications. And its compact size and sealed combustion enables installation in small spaces. A built-in power vent makes both vertical and horizontal venting possible while the electronic ignition maximizes energy efficiency. This unit yields enough power to supply two showers simultaneously and features an adjustable temperature control for improved comfort.

• Direct Vent Room Sealed Combustion
• H 23½" x W 15¾" x D 8½"

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

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