The R3400 series of gas-fired condensing boilers from ELCO UK has set benchmarks for high output, combined with low weight, compact dimensions and low emissions. Up to 1,870kW is obtainable from a single unit.

  • Compact Dimensions and Light Weight
  • High Efficiency
  • Low Emissions
  • Up to 8 boilers in cascade
  • Controls options
  • 2 year guarantee – 1st year’s service included
Boiler Model R3401R3402R3403R3404R3405R3406 
Nominal heat output 80/60°CkW164/657182/729213/853241/965270/1078297/1189
Nominal heat output 50/30°CkW662739.3864.7978.81092.91206.1
Nominal heat input (gross)kW779.22870.241017.871152.181286.491419.69
Nominal heat input (net)kW702784917103811591279
Weight empty/fullkg675/725740/793840/910950/10251070/11501200/1285
Boiler seasonal efficiency* (gross)%90.9590.9590.9590.9590.9590.95
NOx level @ 0% O2mg/kWh61.461.461.461.461.461.4
Boiler Model R3407R3408R3409R3410
Nominal heat output 80/60°CkW325/1309372/1496418/1683465/1870
Nominal heat output 50/30°CkW1327151617061896
Nominal heat input (gross)kW1554177619982220
Nominal heat input (net)kW1400160018002000
Boiler seasonal efficiency* (gross)%90.9590.9590.9590.95
NOx emission @ 0% O 2mg/kWh61.461.461.461.4

*Calculated using the formula given in Equation 2 in the Non-Domestic Building Services Compliance Guide

The latest specification Ultramax R3600SB boilers have been installed at a major central London office development in high and low temperature circuits which meet the 260,000sq ft building’s heating and energy management system needs.

Constructed by Skanska, the ultra modern office development at One Kingdom Street is the latest addition to the Paddington Central scheme, a new mixed use area that has become established as one of London’s premier business, residential, healthcare and leisure destinations.

Five Ultramax R3600SB stainless steel premix gas fired condensing boilers, with a total output of nearly 4.5MW, have been installed at One Kingdom Street which has achieved outstanding green credentials with an ‘Excellent’ BREEAM environmental rating.