- Features
- Specifications
- Documents
Warranty Length
- 5 Year (Parts) Warranty
- 12 Year (Heat Exchanger) Warranty
Features
- No-touch combustion setup, engineered for five-minute start-up
- Self-diagnostic boiler control
- Rate-based temperature reset, no outdoor sensor required
- Assesses environmental conditions, continually adjusting boiler operation for comfort and efficiency
- Three-side unobstructed service access - fast removal of front and side panels
- Simple 2-step natural gas-to-LP conversion with no kits or additional parts required
- Easy lift, wall hanging design (floor stand optional)
- Alta FastPipe (primary/secondary piping) included on combi models, optional on heating models
- Continuous high-efficiency combustion without manual throttle or offset adjustments
- Automatic self-calibration adjusts to variables in environment, component wear, gas and vent pressure
- Low gas pressure capability (2.5 in. wc gas, 8.0 in. wc LP)
- The world's first 10:1, gas adaptive combi boiler!
- Virtually instantaneous DHW response time
- Selectable economy or comfort/recirculation modes
- DHW temperature maintained under all demand conditions
- 10:1 DHW turndown conserves fuel and extends boiler life
- Integrated DHW hydro block with quick-disconnect flat plate DHW heat exchanger, boiler circulator, 3-way valve, and instantaneous DHW flow sensor
Control Type:
Push Button
DOE Heating Capacity:
141,000
Fuel Type:
Natural Gas/Propane
Material:
Stainless Steel
Vent Type:
Polypropylene, Direct Vent, CPVC



