TECHNICAL DATA SHEET
The new HM Family is Riello's solution for the most demanding users. The primary heat exchanger, made entirely of stainless steel, guarantees maximum efficiency and reliability over time, and the new optimized domestic hot water heat exchanger ensures exceptional comfort and the highest energy efficiency rating (class A). The new HM Family is available with outputs of 25, 30, and 35 kW, in combined instantaneous and heating-only versions.
Riello Family HM 25 KIS Condensing Boiler Code 20187642 Methane Complete with Flue Gas Exhaust Kit
ENERGY CLASS IN HEATING / A
ENERGY CLASS IN SANITARY / A
LOADING PROFILE / XL
NOMINAL HEAT CAPACITY kW 20.0
NOMINAL THERMAL POWER (80°-60°) kW 19.5
NOMINAL THERMAL POWER (50°-30°) kW 21.2
REDUCED THERMAL OUTPUT kW 3.6
REDUCED THERMAL POWER (80°-60°) kW 3.5
REDUCED THERMAL POWER (50°-30°) kW 3.8
SANITARY WARE* NOMINAL HEAT INPUT kW 25
NOMINAL THERMAL POWER** kW 26.3
REDUCED THERMAL OUTPUT kW 3.6
REDUCED THERMAL POWER kW 3.3
EFFICIENCY USEFUL EFFICIENCY (80°-60°) PN MAX. - PN MIN. % 97.4
COMBUSTION EFFICIENCY % 97.8
USEFUL EFFICIENCY (50°-30°) PN MAX. - PN MIN. % 106.2
PROFIT YIELD 30% MAX PN (30° RETURN) % 108.4
ELECTRICAL DATA TOTAL ELECTRICAL POWER (PMAX HEATING) W 84
TOTAL ELECTRIC POWER (PMAX SANITARY) W 95
SUPPLY VOLTAGE V - Hz 230 - 50
IP X5D PROTECTION RATING
HEATING MAXIMUM HEATING PRESSURE bar 3
MAXIMUM TEMPERATURE °C 90
HEATING WATER TEMP. SELECTION RANGE 20/45 - 40/80
EXPANSION VESSEL 10 l
HEALTH EXERCISE* MAXIMUM PRESSURE bar 8
DIMENSIONS AND WEIGHTS BOILER DIMENSIONS (HxWxD) mm 822x470x275
NET BOILER WEIGHT 35 kg
FAMILY 
NEW EXCHANGER
Wound stainless steel primary exchanger. Efficiency and reliability are at the heart of Family.
HIGH EFFICIENCY
Maximum comfort and minimal heating and domestic hot water consumption. New, optimized, condensing plate heat exchanger for best-in-class performance in terms of efficiency, temperature stability, and standby times.
INTUITIVE CONTROL
The color graphic display constantly informs you of the boiler's operational status. Navigating the functions and programming options, thanks to the interface with icons and text elements, has never been easier.
LOW EMISSIONS
In the continuous path of reducing emissions, the new Family is certified NOx Class 6, the best allowed by European standards.
QUICK INSTALLATION
Time is precious. With Family HM, installation and component access are simplified to minimize time and effort.
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