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 HeatMaster® 25C...

High Efficiency Range

Condensing storage combination boiler – Perfect for residential and small commercial applications

The HeatMaster 25C brings the benefits of HeatMaster into residential and small commercial applications. ACV's unique integrated Tank-in-Tank method of hot water storage ensures the HeatMaster 25C delivers responsive, reliable heating and hot water for all seasons.

Certified Performance ****
NOx class 5 rating
 
Responds to high peak demand and high continuous flow

  • 35 kW output in production of domestic hot water
  • 365 litres of hot water in the first 10 minutes
  • 25 kW output in heating mode

Efficient, hot water production with low emissions

  • Low NOx emissions: below 40 mg per kWh

Tank in tank hot water storage

  • Stainless steel Tank-in-Tank design with proven long life reliability
  • Anti-Legionellae: hot water stored at consistently high temperature

Ideal for renovation applications

  • Insensitive to water flow rate due to high water content: safe and reliable
  • No need for bypass: simplified installation
  • Adaptable to all types of installation including existing chimney connections

Perfect replacement for Andrews/State/Lochinvar water heaters
Dimensions



DIMENSIONS

A

B

C

D

E

F

G

H

I

HM 25 C

1700

590

350

1015

360

213

770

370

716

 

 HYDRAULIC CONNECTIONS    HeatMaster 25 C
 Heating connection [F] ø 1"
 DHW connection [M] ø ¾"
 Gas supply [M] ø ¾"

Characteristics

Technical Data

   HM 25C
    NAT GAS LPG
Input max/min kW 35/6 30/6
Output max/min kW 24.2/5.8 24.2/5.8
Efficiency at 100% load 80/60°C % 96.5 96.5
Efficiency at 100% load 50/30°C % 107.0 107.0
Efficiency at 30% load [EN677] % 107.5 107.5
Seasonal efficiency % 96.8 96.8
Total capacity L 201.5 201.5
Primary capacity L 126.5 126.5
Primary flow & return connection ø 1" 1"
Secondary hot water Connection ø 3/4" 3/4"
Flue connection ø 80/125mm 80/125mm
Max length concentric flue mtr 20    20   
Nox class (EN483)   class 5 class 5
Weight empty kg 158    158
Natural gas flow rate - 20mbar m3/h 2.64  
Pressure drop mbar 30 30
Maximum operating temperature °C 90 90
 
Performance Data   HM 25C
Litres in first 10 minutes 40°C 365
Litres in first 10 minutes 45°C 300
Litres in first 10 minutes 60°C 200
Litres in first hour 40°C 1172
Litres in first hour 45°C 989
Litres in first hour 60°C 688
Continuous flow 40°C Ltrs/hr 976
Continuous flow 45°C Ltrs/hr 836
Continuous flow 60°C Ltrs/hr 586


Easy to use control panel

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