Legacy products


HeatMaster® 70 N

High performance combined boiler and water heater

# A1002070

  • Fuel
  • Boilers
  • Standard
  • Floor installation
  • Stainless steel Tank-in-Tank design
  • 69.9 kW (HeatMaster® 70 N) or 107.0 kW (HeatMaster® 100 N) Outputs.
  • Choice of Burner:
  • Low NOx Premix gas or LPG
  • Forced draught natural gas or LPG
  • Pressure jet 28 sec or 35 sec oil
  • Can also be used as a stand alone water heater
  • Anti –Legionellae: hot water stored at a consistently high temperature
  • Built-in primary circuit shunt *****HEP*******pump, internal expansion vessels, safety valve and low water pressure switch
  • Control panel including thermostats, combined temperature and pressure gauge, indicators and on/off switch
  • Stove enamelled casing
  • The Heatmaster can be used in conjunction with the Smart and Jumbo storage tanks, supplying even the largest hot water requirement
  • Vented or unvented use, mains pressure Systempak available.


  1. Cold water inlet
  2. Automatic air vent.
  3. Water thermostat.
  4. Primary expansion vessels.
  5. Low water pressure switch.
  6. Control thermostat.
  7. Primary circuit safety valve.
  8. Boiler charge *****HEP*******pump.
  9. Rigid polyurethane insulation.
  10. Flue reduction collar.
  11. Turbulators.
  12. Heating circuit flow.
  13. Domestic hot water outlet.
  14. Internal stainless steel tank.
  15. Stainless steel thermostat pocket for DHW.
  16. Primary circuit.
  17. Flue pipes.
  18. Heating circuit return.
  19. Drain valve.
  20. Combustion chamber.


Capacity (total) 239 L
Heating surface DHW tank 3,14
Capacity (domestic hot water) 131 L
Connection - DHW 1 M inches
Max operating temperature 90 °C
Max service pressure (DHW) 8,6 bar
Max service pressure heating (primary) 3 bar
Weight (empty) 285 kg

Hot water performances

Peak flow at 40°C 646 L/10’
Peak flow 1st hour at 40°C 2133 L/60’
Continuous flow at 40°C 1835 L/h
Peak flow 1st hour at 45°C 1794 L/60’
Continuous flow at 45°C 1573 L/h
Peak flow at 60°C 346 L/10’
Peak flow 1st hour at 60°C 1219 L/60’
Continuous flow at 60°C 1101 L/h
Pre-heating time from 10 to 80°C (Heat source: boiler) 24 min
Input max (heating) LCV 69,9 kW
Input max (heating) HCV 77,7 kW
Output power max (80/60°C) 63 kW
Efficiency at 30% load (EN677) 96,7 %
Connection - heating 6/4 F Ø inches
Water pressure drop boiler at Δt = 20°C 46 mbar
Chimney connection 150 Ø mm
Voltage 230 V
Protection IP 30
Electrical consumption 95 W
Capacity expansion tank(s) 2 x 10 L
Dim. - Depth (w/o conn.) 800 mm
Dim. - Height (w/o conn.) 1750 mm
Dim. - Width or Diameter (w/o conn.) 680 mm
Dim. - Depth (with conn.) 831 mm
Dim. - Height (with conn.) 1728 mm
Dim. - Width or Diameter (with conn.) 678 mm

Other products

HeatMaster® 100 N
Legacy products

High performance, combined direct fired boiler and water heater

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