- .82 EF with all copper heat exchanger
- Industry First! 0.26 GPM minimum flow rate, 0.40 GPM minimum activation flow rate
- Exclusive! Overheat film wrap (OFW) to protect the heat exchanger
- Environmentally friendly Ultra Low NOx burner meets SCAQMD rule 1146.2 requirements
- High-altitude capability - up to 9,840 ft. elevation above sea level