- A vertical-tube boiler with a modulating (7:1) fan-assisted
burner offers the smallest (5.4 square feet) installed
footprint of its kind and efficiencies of 84% (Cat I) or
86.2% (Cat IV).
- Full onboard diagnostics in real English,
storing up to 15 reported faults.
- Low NOx compliant in
all 50 states.
- Minimum inlet temp 120°F.
- Fits through a 30” door.
- Built-in cascade control for up to 4 unit