Condensing Boilers

HeatMaster C, TC

HeatMaster 25 TC

Combined gas fired condensing boiler and water heater with stainless steel heat exchanger.

  • Tank-in-Tank technology
  • Also available in five other sizes, 35-120kW.
  • Supplied with LPG kit for easy on-site conversion

# GTIN : 5400891001455
# P/N : 05652101

  • Gas
  • Boilers
  • DHW Production
  • Standard
  • Concentric
  • Floor installation
  • Heating and hot water from one unit saves space, reduces energy use and speeds up installation
  • Operates in most efficient mode (condensing) for both heating and hot water
  • Low maintenance with no anode protection required
  • Reduces legionella risk due to temperature stored at > 60°C
  • Corrosion-resistant stainless steel heat exchanger backed by a 10-year warranty reduces maintenance and increases system lifespan
  • Suited to high demand and critical hot water premises such as hotels and hospitals
  • Long life – 25-year guarantee on the corrosion resistant stainless steel cylinder
  • Easy to use standardised controls using ACVMax control system
  • Combine with Prestige® heat only boilers or Smart cylinder for highly efficient heating and hot water performance all from one manufacturer
  • Suitable for vented or unvented systems (optional unvented kit required)
  • Supplied with LPG kit for simple on-site conversion
  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. Primary circuit separation disc
  7. Indirect water pre-heater
  8. Condensate recovery dish
  9. High efficiency circulator pump
  10. Pressure sensor
  11. NTC Sensor (Heating circuit)
  12. Electrical panel (with spare fuses at the back)
  13. ACVMax Control panel
  14. DHW tank dry well (Sparge tube with temperature sensor)
  15. Automatic air vent
  16. Gas pipe
  17. Gas valve
  18. Connection for DHW safety valve (to be installed)
  19. Modulating air/gas premix burner with fan
  20. Air inlet

Constructive characteristics

Capacity (total) 196 L
Capacity (primary) 100 L
Capacity (domestic hot water) 96 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 1/2M 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) 177 kg

Heating characteristics

Pre-heating time from 10 to 80°C (Heat source: boiler) 35 min
Reheat time from 40 to 90°C 30 min
Reheat time from 40 to 80°C 22 min
Heating time from 10 to 90°C 43 min

Combustion

Input max (heating) HCV 27,8 kW
Input max (heating) LCV 25 kW
Combustion efficiency 98,2 %
Efficiency at 30% load (EN677) 109,0 %
Efficiency at 100% load (50/30°C) 103,9 %
Efficiency (max output) 80/60°C 98 %
Efficiency (min output) 80/60°C 98 %
Efficiency DHW mode ΔT 30K 105,4 %
CO emissions max output 27 ppm
CO emissions min output 6 ppm
Mass rate of combustion products (gas) 42 kg/h
NOx weighted (GCV) (EN15502) 24,6 mg/kWh
NOx class (EN15502) 6
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

Domestic hot water performance

Peak flow at 40°C 361 L/10’
Peak flow 1st hour at 40°C 1018 L/60’
Continuous flow at 40°C 788 L/h
Peak flow at 45°C 301 L/10’
Peak flow 1st hour at 45°C 865 L/60’
Continuous flow at 45°C 676 L/h
Peak flow at 60°C 183 L/10’
Peak flow 1st hour at 60°C 577 L/60’
Continuous flow at 60°C 473 L/h

Electrical Characteristics

Voltage 230 V
Frequency 50 Hz
Protection IP 30
Electrical consumption 95 W
Electrical power requirements 0,7 A
    • Technical brochure

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

    • 11.07 MB – en

    • Technical brochure

    • ACVMax - Installers handbook for heating systems controlled with ACVMax

    • 25.55 MB – en

    • Technical brochure

    • HeatMaster C, TC

    • 10.88 MB – en

    • Marketing brochure

    • Product Guide 2019-20

    • 12.41 MB – en

Eco Design Fields

Space heating energy efficiency class A
Seasonal space heating efficiency 93 %
Declared load profile XXL
Water heating energy efficiency class A
Water heating energy efficiency [ηwh] (EU 814/2013 Art 2 (15) Ann.IV-3) 87,2 %
Sound power level indoors LWA 60 dB
    • Energy Label

    • HeatMaster 25 TC

    • Product Fiche

    • HeatMaster 25 TC

Other products

HeatMaster 25 C
Condensing Boilers
HeatMaster 45 TC
Condensing Boilers
HeatMaster 70 TC
Condensing Boilers
HeatMaster 120 TC
Condensing Boilers
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