Bosch T-9800 160k BTU Residential Outdoor Tankless Water Heater

The Bosch T-9800 160k BTU Residential Outdoor Tankless Water Heater is the outdoor Greentherm T9800 SEO configuration for residential applications where the water heater is mounted outside instead of vented indoors. The 160,000 BTU/hr capacity supports efficient tankless operation for moderate domestic hot water demand.

Bosch outdoor T9800 documentation identifies the SEO platform with an active bypass valve for temperature stability, an externally accessible in-line water filter on the cold water inlet, and outdoor-only installation instructions. This version avoids indoor flue routing while retaining condensing performance.

Product Features:

• Outdoor SEO Configuration: Purpose-built exterior version for outdoor installation applications.
• 160,000 BTU/hr Capacity: Moderate-output outdoor model for residential domestic hot water loads.
• Active Bypass Valve: Outdoor manual states the heater uses an active bypass valve for water temperature stability under constant flow.
• External In-Line Water Filter: Bosch outdoor documentation identifies a service-accessible inlet water filter.
• No Indoor Vent Chase Needed: Outdoor mounting eliminates the need to route combustion exhaust through interior rooms.
• Freeze-Sensitive Installation Planning: Outdoor placement requires following Bosch climate, power, and freeze-protection instructions.
• Exterior Service Access: Outdoor cabinet layout supports direct service access without entering the home.

Warranty

This product includes a manufacturer’s limited warranty. Verify model number, fuel type, electrical requirements, venting, water quality, and local code requirements before installation.