PERFORMANCE SUMMARY

Input: 399,000 to 1,000,000 Btu/h
Vessel Orientation: Vertical
Vent Category: IV (positive, condensing)
Fuel: Natural Gas and LP
ASME Stamp: H
Operating Pressure: 125 psi at 250 F
Certification: UL 795
Thermal Efficiency: Up to 97% at part load
93% per ANSI Z21.13
and no less than 87% with typical system water temps
Standby Losses: ASHRAE 90.1-1999 compliant
NOx: SCAQMD certification available


CONSTRUCTION AND OPERATING FEATURES

Furnace tubesheet insulator
Direct inlet air and through-the-wall venting options
3 to 1 turndown on 1 million Btu/h model

Where condensate forms in the boiler, stainless steel, electroless nickel plating and condensate inert polymers augment the steel pressure vessel
 

GAS-FIRED, CONDENSING BOILER

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  • No minimum flow rate or return temperature required
  • No primary /secondary system required
  • Thermal efficiency from 87% to 97% depending upon return water temperature and firing rate.
  • One-million-Btu model is stage fired at 3-to-1 turndown
  • Sidewall venting through up to 500 equivalent feet