The Ultra® Series 4 features a state-of-the-art heat exchanger with nanotechnology coating that works like “UltraArmor®“, reducing build up in the heat exchanger while maintaining high efficiency.
- Designed to operate in low temperature condensing applications
- Outdoor reset and domestic hot water priority
- Modulates with 5:1 turn-down ratio
- U-Control gives you the power for easy set-up and maintenance:
- Multiple set-up and zone options
- System sensing recognizes system and outdoor temperatures
- Temperature management for up to three different set-points
- Control multiple boilers from a single control panel
- Standard screen messages provide service alerts and maintenance reminders
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