- Suitable for indoor and outdoor installations
- 92%+ thermal efficiency
- 199,000 BTU maximum input
- 10.5 gallons per minute capacity at 35F degree rise
- Minimum activation flow rate of 0.65 gallons per minute
- Electronic ignition and patented burner design
- Exclusive safety and precision controls
- Direct vent, vertically or horizontally with Stainless Steel, PVC, CPVC or ABS-DWV
- Concentric and twin pipe venting options
- Can be used in solar thermal, recirculation applications
- Built for durability and serviceability with 15-year warranty and 20+ year life expectancy
- Available in NG and LP models
Eligible for up to $1500 Federal Tax Credit (30% of purchase price and residential installation)
This model is another top performing, fully condensing gas tankless water heater from Bosch. This model offers high flow rates, efficiency and the most advanced features in tankless technology, yet requires only 199,000 BTU/Hr input.
Download Installation Manual (PDF) 
Frequently Asked Questions 
Warranty Info
15 year limited warranty on heat exchanger; 3 year warranty if used in direct recirculating applications
15 year warranty on heat exchanger if used if recirculated through a storage tank such as the Ariston mini-tank
5 year warranty on all other parts
Installation Manual