Bosch T-9800 199k BTU Residential Outdoor Tankless Water Heater

The Bosch T-9800 199k BTU Residential Outdoor Tankless Water Heater is the high-capacity Bosch Greentherm T9800 SEO outdoor tankless water heater for larger residential hot water loads. Its 199,000 BTU/hr input gives the outdoor model stronger multi-fixture performance than the 160k SEO version.

The outdoor T9800 SEO series is documented as an exterior-only condensing platform with temperature-stabilizing bypass control and a cold-water inlet filter that is accessible from outside the unit. The 199k model is suited for projects needing outdoor mounting plus higher domestic hot water output.

Product Features:

• 199,000 BTU/hr Outdoor Input: Higher-capacity SEO version for large residential exterior installations.
• Exterior-Only Application: Bosch outdoor instructions identify SEO models for outdoor installation only.
• Temperature Stability Control: Active bypass valve helps maintain outlet water temperature consistency during flow changes.
• Cold-Inlet Filter Access: In-line water filter is positioned for service access at the water inlet.
• High-Demand Outdoor Sizing: More appropriate than the 160k outdoor unit for larger homes or colder incoming water.
• Weather-Exposed Cabinet Use: Outdoor enclosure is designed for exterior mounting when installed to Bosch requirements.
• Reduced Indoor Mechanical Impact: Moves combustion and heat rejection outdoors, preserving indoor mechanical space.

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.