• 75 MBH – 164 MBH
  • 4.5:1 Turndown Modulation Ratio in Heating Mode (MAH-75)
  • 5.6:1 Turndown Modulation Ratio in Heating Mode (MAH-100)
  • 5.7:1 Turndown Modulation Ratio in Heating Mode (MAH-125)
  • 5.5:1 Turndown Modulation Ratio in Heating Mode (MAH-165)
  • LABOR SAVER™ Manifold Included : the pre-manufactured primary/ secondary piping saves time and money on the job site
  • Heat Exchanger: 316L Stainless Steel Heat Exchanger and Burner.
  • Additional Features: Assembled Boiler With Jacket, Induced Draft Fan, High limit sensors, 30psi Relief Valve, Low Water Pressure Switch and, Temperature/Pressure Gauge.
  • Build-In Load Matching Pump contributes to savings in electrical usage.

  • Outdoor Temperature Sensor, Indirect Tank Sensor and, Floor Stand Kit
  • Our AI control technology is programmed to recognize an Indirect Tank. H2O Indirect Hot Water Heaters are available in 30-to-115-gallon capacities and feature 316L stainless steel construction and top connections for easy installation.

(See Installation, Operation and Maintenance Manual for complete instructions)