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Gas boiler HEATMASTER 25 EVO 2
combicommercialindoor

Gas boiler - HEATMASTER 25 EVO 2 - ACV - combi / commercial / indoor
Gas boiler - HEATMASTER 25 EVO 2 - ACV - combi / commercial / indoor
Gas boiler - HEATMASTER 25 EVO 2 - ACV - combi / commercial / indoor - image - 2
Gas boiler - HEATMASTER 25 EVO 2 - ACV - combi / commercial / indoor - image - 3
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Characteristics

Power source
gas
Type
combi
Sector
commercial
Interior/exterior use
indoor
Other characteristics
condensing, for water heaters, with integrated storage tank
Certifications
class A
Power

Min.: 4.9 W
(16.72 BTU/h)

Max.: 24.3 W
(82.92 BTU/h)

Length

600 mm
(24 in)

Width

708 mm
(28 in)

Height

1,780 mm
(70 in)

Weight

177 kg
(390.2 lb)

Water heater capacity

196 l
(51.8 gal)

Description

Product overview
  • Commercial combi boiler combining all the benefits of domestic combi boiler technology while comfortably meeting peak commercial domestic hot water (DHW) demands.
  • Tank-in-tank technology for hot water production.
  • Operates on Natural Gas and LPG (supplied with LPG kit for simple on-site conversion).
  • 5-Year Warranty.
  • ErP Class A; NOx levels significantly under 40 mg/kWh and operating efficiencies well above Part L (2022) minimum requirements.
  • Internal time clock offering up to 6 programmes within a 24-hour period for fuel usage management.
  • Multiple control options: On/Off, 0-10V power or temperature control; BMS communication via Modbus.
  • Corrosion-resistant stainless steel heat exchanger and stainless steel tank to reduce maintenance and increase lifespan.
  • Suited to high-demand and critical hot water premises such as hotels and hospitals.
  • Operates in condensing (most efficient) mode for both heating and hot water.
  • Integrated legionella protection.
  • BIM & CAD objects available.

Schematics / Main components
  • Concentric flue gas/air inlet box
  • Flue gas exhaust tube
  • Combustion chamber
  • Stainless steel heat exchanger
  • Stainless steel "Tank-in-Tank" hot water production tank
  • Primary circuit separation disc
  • Indirect water pre-heater
  • Insulation
  • Condensate recovery dish + NTC5 sensor (flue gas)
  • High efficiency circulator pump
  • NTC2 sensor (CH return)
  • Electrical panel (with spare fuses at the back)
  • ACVMax Touch Control panel
  • On-Off switch
  • DHW tank dry well (dip tube with temperature sensor)
  • Automatic air vent
  • Gas pipe
  • NTC1 sensor (CH supply)
  • Gas valve
  • DHW safety valve (T&P relief valve - UK only)
  • Modulating air/gas premix burner with fan
  • Air inlet
  • DHW outlet
  • DHW recirculation tube

Key features and benefits
  • Space and time saving solution: no separate boiler and hot water cylinder required.
  • Low NOx emissions (NOx weighted (GCV) 24.6 mg/kWh for this model).
  • High combustion and seasonal efficiencies (combustion efficiency 98.2%, seasonal space heating efficiency 93%).
  • Quiet indoor sound power level (60 dB LWA).
  • Multiple ancillary and control accessory compatibility (room thermostats, room controllers, sensors, MCBA, etc.).

Caractéristiques / Spécifications techniques
  • Model designation: HeatMaster 25 Evo 2
  • Manufacturer / Brand: ACV
  • Part number (P/N): 554252
  • GTIN / EAN: 5400891542521
  • Capacity (total): 196 L
  • Capacity (primary): 100 L
  • Capacity (domestic hot water): 96 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
  • Connection - DHW: 1" M
  • Connection gas: 3/4" M
  • Connection - re-circulation / safety valve: na / 1" F
  • Connection - safety valve: 1/2" M
  • 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: 1880 mm
  • Weight (empty): 177 kg
  • 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
  • Input max (heating) HCV: 27.8 kW
  • Input max (heating) LCV: 25 kW
  • Combustion efficiency: 98.2 %
  • Efficiency at 30% load (EN15502-1): 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): 0.52 m³/h
  • Domestic hot water performance - Peak flow at 40°C: 361 L/10'
  • Domestic hot water performance - Peak flow 1st hour at 40°C: 1018 L/60'
  • Domestic hot water performance - Continuous flow at 40°C: 788 L/h
  • Domestic hot water performance - Peak flow at 45°C: 301 L/10'
  • Domestic hot water performance - Peak flow 1st hour at 45°C: 865 L/60'
  • Domestic hot water performance - Continuous flow at 45°C: 676 L/h
  • Domestic hot water performance - Peak flow at 60°C: 183 L/10'
  • Domestic hot water performance - Peak flow 1st hour at 60°C: 577 L/60'
  • Domestic hot water performance - Continuous flow at 60°C: 473 L/h
  • Electrical characteristics - Voltage: 230 V
  • Electrical characteristics - Frequency: 50 Hz
  • Electrical characteristics - Protection IP: IP20
  • Electrical characteristics - Electrical consumption: 101 W
  • Electrical characteristics - Electrical power requirements: 0.7 A
  • Eco Design - Space heating energy efficiency class: A
  • Eco Design - Seasonal space heating efficiency (35°C): 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): 93.2 %
  • Sound power level indoors LWA: 60 dB

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.