Watertube Hot Water Boilers

Unilux W and Evolv-W Series

Our Unilux W Series and Unilux Evolv-W water boilers are the first and only 5-pass, bent-tube boilers that operate at 85% efficiency, standard. The tangent tube design allows for unsurpassed convective internal pumping and maximum heat transfer. Standard design pressure is 160 PSI / ASME Section IV, with higher pressures available.

  • Flexible burner selection
  • Useable heated water in under 15 minutes
  • Easy access to boiler controls for safety and serviceability
  • Easy fireside access for inspection and service
  • Available as field-erect (FE) units that don’t require on-site welding (ASME Section I and IV)
  • Industrial grade materials throughout
  • 25-year standard warranty against thermal shock damage

Our Unilux W Series and Unilux Evolv-W Series boilers have the greatest size range of standard product available in this design and can be used wherever heated water is required.