Low temperature, high efficiency, floor standing steel boiler.

Available in 3 models with outputs (at 80/60°C) of 440, 510 and 580kW.

 

Efficiency 86 product icon
Fuel NG LPG oil biofuel dualfuel product icon
Turndown 3 product icon
Warranty 2 product item
  • Advanced return distribution within boiler allows operation with return temperatures as low as 15°C. (Minimum flow temperatures apply).
  • Operating efficiencies of up to 95% nett (86% gross) at part load.
  • Suitable for use on open vented or sealed low temperature hot water heating systems .
  • Robust three-pass heat exchanger design helps to achieve European Class 5 performance for NOx emissions.
  • Suitable for use with liquid biofuel as a renewable energy choice. Natural Gas, LPG (propane) or oil are other fuel options.
  • Extensive back up and support from our team of experienced engineers across the UK.
  • Long term commitment to spare parts.
  Ensbury LT boiler model Units ELT440 ELT510 ELT580
Energy Building regulations Part L seasonal efficiency % gross 85.05 85.11 84.97
Boiler output 80/60°C kW 440 510 580
Boiler input (gross) - maximum kW 537 622 707
Boiler input (nett) - maximum kW 483 560 637
Boiler output - minimum 80/60°C, NG kW 100 100 165
Boiler output - minimum 80/60°C, oil kW 127 127 219
Water Water content litres 540 540 540
System design flow rate @ 20°C ∆T rise l/s 5.26 6.1 6.94
Water side pressure loss @ 20°C ∆T rise mbar 20 27 35
System design flow rate @ 10°C ∆T rise l/s 10.53 12.2 13.88
Water side pressure loss @ 10°C ∆T rise mbar 81 108 140
Water flow rate - minimum l/s No minimum flow rate
Minimum water pressure barg 4 4 4
Maximum water pressure barg 0.5 0.5 0.5
Maximum water flow temperature °C 90 90 90
Minimum water flow temperature - NG °C 60 60 60
Minimum water flow temperature - oil °C 50 50 50
Minimum water return temperature °C 15 15 15
Gas Gas flow rate, NG - maximum m3/hr 51.2 59.3 67.4
Inlet pressure for NG - nominal mbar 20 20 20
Inlet pressure for NG - maximum mbar 50 50 50
Input rate for oil (35sec) l/h 50.8 58.8 66.9
Flue Approx. flue gas volume @ 15°C, 9% CO2, N.T.P m3/hr 614.9 707.1 830.1
Flue gas temperature @ 80/60°C °C 182 192 197
Combustion chamber resistance mbar 2.53 3.83 5.86
Connection Water flow/return connections PN6 - DN80
Gas inlet connection pipe thread size Rc1 ½" Rc2" Rc2"
Safety valve connection Rc1 ½" Rc1 ½" Rc1 ½"
Drain connection R1" R1" R1"
Flue diameter (O/D) - nominal mm 250 250 250
Electrics Electrical supply for boiler 230V 1Ph 50Hz
Electrical supply for burner 230V 1Ph 50Hz / 400V 3Ph 50Hz Dependant on burner selection
Approx shipping weight (excluding burner) kg 973 976 980
  Title Type Size  
Ensbury LT boiler brochure Ensbury LT boiler brochure Product brochures 2375 ko Download
Ensbury LT boiler dimensions Ensbury LT boiler dimensions Dimensions 148 ko Download
Ensbury LT boiler data tables Ensbury LT boiler data tables Data tables 113 ko Download
Ensbury LT boiler installation manual Ensbury LT boiler installation manual Installers guides 2275 ko Download
Ensbury LT boiler wiring diagram Ensbury LT boiler wiring diagram Wiring diagrams 109 ko Download
Ensbury LT seasonal efficiency Ensbury LT seasonal efficiency Seasonal efficiency sheets 109 ko Download
  • New build projects.
  • Housing developments and flats using district heating networks.
  • Large commercial and public buildings including schools, hospitals, offices and hotels.
  • Medium sized commercial and public buildings including schools, hospitals, offices and hotels.
  • Rural locations without access to mains gas supply.
  • Locations with substantial and continuous heating loads including hospitals, care homes and hotels.
  • To see where our Ensbury boilers have been used, visit our case studies page.
  • Can be installed with the Arne flue gas economiser to increase operating efficiency by up to 18%.
  • Choose from a wide range of service contracts to help maintain optimum performance.
  • Book commissioning at the same time as placing your order for improved warranty terms.