Steam Boilers

Greenstar Superplus

GREENSTAR SUPERPLUS is the most super-efficient boiler having 104% overall thermal efficiency based on net calorific value (NCV or LHV) of Natural Gas. GREENSTAR SUPERPLUS has five-pass configuration, two passes of smoke-tube type main boiler and the third, fourth and fifth pass in the form of economizer, two water preheaters (condensing and non-condensing), as heat recovery units, to achieve maximum thermal efficiency. GREENSTAR SUPERPLUS is the most compact, lightweight smoke tube boiler, most suitable where space availability is very limited.


  • 104% overall thermal efficiency based on net calorific value (NCV or LHV). The 104% overall thermal efficiency results in large fuel savings.
  • This gas fired boiler GREENSTAR SUPER has optimized configuration of heating surfaces and tube sizes for efficient operation of the boiler.


Steam Output (F&A 100°C) 1 Ton/hr to 34 Ton/hr or Higher
Safety Valve Set Pressure, bar(g) 10.54 / 17.5 / 21.0 / 25.0 or Higher
Maximum Steam Temperature Dry & Saturated Or Superheated
Thermal Efficiency 104% on NCV/LHV of Natural Gas
Steam Generation Control Step-less Modulation
Combustion Control Step-less Modulation
Draft Control Step-less Modulation


  • Efficiency upgradation services
  • Performance trials as per direct and indirect method


The GREENSTAR SUPERPLUS, a compact condensing boiler, i.e. – boiler with condensing water-preheater, having 104% overall thermal efficiency, is used for cost effective industrial process heating applications, at highest thermal efficiency.