Condensing Boilers

HeatMaster C, TC

HeatMaster 25 C

Gas fired condensing combined boiler and high output water heater

  • Also available in propane.
  • Tank-in-Tank Technology
  • 5 Year Warranty (subject to terms and conditions)

# A1002007

  • Gas
  • Boilers
  • DHW Production
  • Standard
  • Concentric
  • Floor installation
  • Floor standing boiler with large primary water volume, adaptable to all types of existing installation
  • Responds to high peak demand and high continuous flow
  • Exceptional domestic hot water flow: >35L/min
  • NOx rating (EN483) 22.8/kWh
  • Seasonal Efficiency 96.8%
  • Stainless steel Tank-in-Tank DHW cylinder with proven long life reliability
  • Anti Legionellae: hot water stored at consistently high temperature
  • Stainless steel self-cleaning heat exchanger
  • High efficiency boiler charging pump
  • Concentric balanced flue or conventional flue options.
  • Can also be used as a stand alone water heater.
  1. Concentric flue gas/air inlet box
  2. Flue gas exhaust tube
  3. Combustion chamber
  4. Stainless steel heat exchanger
  5. Stainless steel “Tank-in-Tank” hot water production tank
  6. DHW circuit tube
  7. Condensate recovery dish
  8. High efficiency circulator pump
  9. NTC sensor (heating circuit)
  10. Pressure sensor
  11. Electrical panel (with spare fuses at the back)
  12. ACVMax Control panel
  13. DHW tank dry well (Sparge tube with temperature sensor)
  14. Automatic air vent
  15. Gas pipe
  16. Gas valve
  17. Connection for DHW safety valve (to be installed)
  18. Modulating air/gas premix burner with fan
  19. Air inlet

Constructive characteristics

Capacity (total) 200 L
Capacity (primary) 120 L
Capacity (domestic hot water) 80 L
Capacity expansion tank(s) - L
Chimney: Max pressure drop in flue pipe 130 Pa
Chimney: max length of concentric flue pipe 20 m
Chimney connection 80/125 Ømm
Connection - heating 1 F Ø"
Connection - DHW 1 M Ø"
Connection gas 3/4 M Ø"
Connection - safety valve 1/2 M Ø"
Max operating temperature 87 °C
Water pressure drop boiler at Δt = 20°C 3 mbar
Max service pressure heating (primary) 3 bar
Max service pressure (DHW) 8,6 bar
Height when tilted 1855 mm
Weight (empty) 174 kg

Heating characteristics

Pre-heating time from 10 to 80°C (Heat source: boiler) 27 min
Heating time from 10 to 90°C 40 min

Combustion

Input max (heating) HCV 27,8 kW
Input max (heating) LCV 25 kW
Combustion efficiency 97,5 %
Efficiency at 30% load (EN677) 109,0 %
Efficiency (max output) 80/60°C 98 %
Efficiency (min output) 80/60°C 98 %
Efficiency DHW mode ΔT 30K 99,2 %
CO emissions max output 27 ppm
CO emissions min output 6 ppm
Mass rate of combustion products (gas) 42 kg/h
NOx class (EN483) 5
Nominal power DHW 25 kW
Output power max (80/60°C) 24,3 kW
Output power min (80/60°C) 4,9 kW
Gas flow rate (min output) 0,5 m³/h

Eco Design Fields

NOx weighted (GCV) 26,3 mg/kWh

Domestic hot water performance

Peak flow at 40°C 233,5 L/10’
Peak flow 1st hour at 40°C 748 L/60’
Continuous flow at 40°C 617 L/h
Peak flow at 60°C 145 L/10’
Peak flow 1st hour at 60°C 478 L/60’
Continuous flow at 60°C 400 L/h

Electrical Characteristics

Voltage 230 V
Frequency 50 Hz
Protection IP 30
Electrical consumption 95 W
Electrical power requirements 0,8 A
    • Technical brochure

    • HeatMaster 25 / 35 / 45 / 70 / 85 / 120 TC (V15) - Installation, Operation and Maintenance instructions

    • 15.77 MB – en

    • Technical brochure

    • ACVMax - Installers handbook for heating systems controlled with ACVMax

    • 25.55 MB – en

    • Technical brochure

    • HeatMaster C, TC

    • 12.66 MB – en

    • Marketing brochure

    • 2018 Product Guide

    • 9.80 MB – en

Eco Design Fields

Space heating energy efficiency class A
Water heating energy efficiency [ηwh] (EU 814/2013 Art 2 (15) Ann.IV-3) 74 %
Declared load profile XXL
Water heating energy efficiency class B
Seasonal space heating efficiency 93 %
Sound power level indoors LWA 60 dB
    • Energy Label

    • HeatMaster 25 C

    • Product Fiche

    • HeatMaster 25 C

Other products

HeatMaster 25 TC
Condensing Boilers
HeatMaster 70 TC
Condensing Boilers
HeatMaster 45 TC
Condensing Boilers
HeatMaster 85 TC
Condensing Boilers
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