Stainless steel calorifiers for indirect hot water.

5 unvented calorifier models and 4 open-vented calorifiers available with continuous outputs (@44°C ∆T) of 390, 527 and 1055 l/h.

 

Warranty 5 cylinder product item
ErP Part L Compliant product icon
  • Power outputs 20-54kW and storage capacities 305-965 litres.
  • Indirect method of producing safe and hygienic domestic hot water.
  • Hot water cylinder and coil made out of corrosion resistant stainless steel.
  • Long life backed up by a 5 year cylinder warranty.
  • Minimal heat loss for maximum economy thanks to layer of CFC-free polyurethane tank insulation under protective plastisol cladding.
  • Highly efficient heat transfer from a corrugated coil design.
  • Low maintenance as no sacrificial anodes or powered corrosion protection systems needed.
  • Can be located wherever convenient.
  • Versatility in use – coupled to Hamworthy boilers or direct heating/backup via immersion heater.
  • UK manufactured hot water calorifiers.
  • Compliant with Energy Labelling requirements of ErP.
  Halstock model Units HS305 HS400 HS500 HS810 HS965
Water Capacity, nominal litres 305 400 500 810 965
Capacity with coil litres 298 396 496 803 958
Continuous output* @44°C ΔT l/h 390 527 527 1055 1055
Continuous output* @50°C ΔT l/h 344 464 464 929 929
Maximum working pressure, tank bar 6 6 6 6 6
Hydraulic test pressure bar 9 9 9 9 9
Energy Coil output kW 20 27 27 54 54
Heat up time @50°C ΔT, coil only min 54 52 66 54 60
Recovery time (70% volume), coil only min 38 36 46 37 44
10 min peak output @50°C ΔT litres 361 481 582 974 1131
Coil max operating temperature °C 100 100 100 100 100
Coil max operating pressure bar 3 3 3 3 3
Coil tube diameter DN DN20 DN25 DN25 DN25 DN25
Coil surface area m2 0.75 1 1 2 2
Standby losses @65°C kW/24hr 2.5 2.9 3.3 4 4.3
ErP efficiency rating - C D D D D
Immersion Immersion heater option, power kW 3 6 6 9 12
Immersion heater option, phase ph 1ph 3ph/1ph 3ph/1ph 3ph 3ph
Heat up time, Immersion only hour 5.8 3.9 4.9 5.3 4.7
Recovery time, Immersion only hour 4.1 2.7 3.4 3.7 3.3
  Expansion vessel size litres 24 35 35 50 80
  Weight empty kg 60 95 105 155 170
  Weight full kg 354 495 605 965 1135
  Title Type Size  
Halstock calorifier brochure Halstock calorifier brochure Product brochures 429 ko Download
Halstock calorifier technical data Halstock calorifier technical data Data tables 554 ko Download
Halstock calorifier installation manual Halstock calorifier installation manual Installers guides 3449 ko Download
  • To provide domestic hot water for any type of commercial building.
  • Designed for use with natural gas, LPG or oil-fired boilers for primary heat source.
  • Direct heating via optional Incoloy 800 electrical immersion heaters.
  • Suited to all areas of the UK, particularly locations with soft water (read here why).
  • Electric immersion heater kits.
  • Choose from a wide range of service contracts to help maintain optimum performance.
  • Book commissioning with Hamworthy approved service engineers.