Ensbury pressure jet boiler
Ensbury pressure jet boiler heat exchanger

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

Product information

    • 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.

Technical data

Units ELT440
Energy
Building regulations Part L seasonal efficiency % gross 85.05
Boiler output 80/60°C kW 440
Boiler input (gross) - maximum kW 537
Boiler input (nett) - maximum kW 483
Boiler output - minimum 80/60°C, NG kW 100
Boiler output - minimum 80/60°C, oil kW 127
Water
Water content litres 540
System design flow rate @ 20°C ∆T rise l/s 5.26
Water side pressure loss @ 20°C ∆T rise mbar 20
System design flow rate @ 10°C ∆T rise l/s 10.53
Water side pressure loss @ 10°C ∆T rise mbar 81
Water flow rate - minimum l/s No min flow rate
Minimum water pressure barg 0.5
Maximum water pressure barg 4
Maximum water flow temperature °C 90
Minimum water flow temperature - NG °C 60
Minimum water flow temperature - oil °C 50
Minimum water return temperature °C 15
Gas
Gas flow rate, NG - maximum m3/hr 51.2
Inlet pressure for NG - nominal mbar 20
Inlet pressure for NG - maximum mbar 50
Input rate for oil (35sec) l/h 50.8
Flue
Approx. flue gas volume @ 15°C, 9% CO2, N.T.P m3/hr 614.9
Flue gas temperature @ 80/60°C °C 182
Combustion chamber resistance mbar 2.53
Connection
Water flow/return connections PN6 - DN80
Gas inlet connection pipe thread size Rc1 ½"
Safety valve connection Rc1 ½"
Drain connection R1"
Flue diameter (O/D) - nominal mm 250
Electrics
Electrical supply for boiler 230V 1Ph 50Hz
Electrical supply for burner 230V 1Ph 50Hz*
Approx shipping weight (excluding burner) kg 973
*400V 3Ph 50Hz Dependant on burner selection

Downloads

Ensbury LT boiler brochure

Product brochures 10320 kb

Ensbury LT boiler installation manual

Installers guides 1877 kb

Ideal uses/applications

Optional extras

  • 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. 
  • Flues available through our flue partner Jeremias UK.

Often bought with

Arne flue gas economiser

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Powerstock glass lined calorifier

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Merley boiler sequence controller

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Case studies

Pitfield Street is a mixed used development which now benefits from a liquid biofuel boiler.

Pitfield Street, London

Sector: Residential and commercial

Project: A 100% liquid biofuel boiler proved to be the greenest heating option for a city centre development consisting of 16 flats and a commercial unit.

Building: New build flats and retail space

Application: Space heating. Renewable energy

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Drayton Manor benefits from Hamworthy high efficiency steel shell boilers and direct-fired condensing water heaters.

Drayton Manor Hotel, Staffordshire

Sector: Hotel and leisure

Project: Guests benefit from the installation of three new Dorchester DR-FC Evo water heaters and two Ensbury LT 370 low temperature steel boilers.

Building: New build hotel

Application: Domestic hot water, 5787 litres/hour. Space heating, 740kW

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Christchurch Police Station installed four of Hamworthy's oil-fired steel boilers.

Christchurch Police Station

Sector: Public sector

Project: Steel boilers from Hamworthy were the ideal solution for this dual-purpose building in Dorset.

Building: Dual-purpose building – police station and adult education centre

Application: Space heating

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