Overview
The WaterMaster series is a range of EN 89 certified condensing gas-fired storage water heaters known for their exceptional domestic hot water (DHW) performance. The models available are WaterMaster 25, 35, 45, 70, 85, and 120, each offering varying capacities and efficiencies.

Specifications
- Models and Ordering Codes: WaterMaster 25 (A1002669), 35 (A1002670), 45 (A1002671), 70 (A1002077), 85 (A1002078), 120 (A1002079).
- Input Power: Ranges from 25 kW to 115 kW depending on the model.
- DHW Efficiency: Up to 108.5% according to EN 89 standards.
- Combustion Efficiency: Approximately 98% across models.
- Peak Flow Rates: Up to 3620 liters in the first hour at 40°C for the WaterMaster 120.
- Continuous Flow Rates: Up to 3402 liters at 40°C for the WaterMaster 120.
- Dimensions: Vary by model, with the largest being 690x2170x753 mm.

Key Features
- Technology: Incorporates ACV’s Tank-in-Tank technology with a stainless steel DHW tank and heat exchanger.
- Environmental Compliance: Meets Ecodesign Lot 2 (812/2013 and 814/2013) standards.
- Burner: Features a modulating pre-mix air/gas burner with low NOx emissions, ensuring ecological operation and easy maintenance.
- Installation: Can be installed in cascade for higher demand applications.
- Design: Compact with a small footprint, suitable for various installation environments.

Additional Information
- The WaterMaster series is derived from the HeatMaster, sharing similar advanced technology and performance capabilities.
- An optional accessory is required for a C53 connection type.

Conclusion
The WaterMaster series offers a robust solution for high-demand hot water applications, combining efficiency, advanced technology, and environmental compliance in a compact design.