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CALOMA is a combi condensing boiler full premix for efficient gas saving.
The boiler is equipped with condensing module featuring a stainless steel coil and is designed to meet the new European Directives on the use of energy. The boiler is certified class 6, the highest ecological classification in
Europe, thanks to its low emissions of nitrogen oxides (NOx).
Its compact size makes it easy to position and adapt with flexibility to new installations or replacement
of existing units at home, or outdoors in partially protected areas.
The controls are simple, with LCD display, auto recognition of errors, and integrated chronothermostat
programming and climatic control.
The boiler has standard anti-freeze protection, external temperature sensor, voltage protection of the PCB and gas pressure regulator included in the gas valve.

Main characteristics

  • Available in three versions 24, 28 and 32 kW
  • Enviromental friendly function - reduced NOx emissions (class 6)
  • Power modulation from 18% to 100%
  • Inovative heat exchanger made of stainless steel, single coil
  • Integrated chronothermostat with 5 preset programs or free slots for user programs
  • Climate control with integrated external temperature sensor: the boiler automatically adjusts the heating temperature according to the external temperature
  • Auto Power Detect: The heating power is automatically adjusted according to the house dimensions
  • Inverter pump - energy class A
  • Big size LCD screen
  • Integrated hydraulic by-pass
  • Standard anti-freeze protection up to -15C
  • Full compatibility with OpenTherm connectivity and remote control


  • High stability of sanitary hot water temperature thanks to flame adjust according to water debit
  • Integradet gas pressure regulator (can function on pressure between 2 ÷ 60 mbar)
  • Automatic restart: repeated restarte precedures in case of lack of gas or draught
  • Three ingition sequences: reduces chance of fault errors
  • Two individual systems for protection against limestone
  • Integrated sanitary hot water debit limiter
  • Pump anti-block system
  • Automatic error recognition

Technical data

Type 24 K28 K32 K
Nominal heat output Prated (80/60oC)kW242832
Maximum heat output Pn (80/60oC)kW23,72833,02
Minimum heat output Pn (50/30oC) - condensingkW253035,5
Minimum heat output (80/60oC)kW7,17,57,8
Minimum heat output (50/30oC) - condensingkW6,77,27,3
Efficiency at nominal heat output Pn (80/60oC)%97,897,997,9
Efficiency at nominal heat output Pn (50/30oC)%106,2106,4106,5
Efficiency at 30% of load Pn (50/30oC)%108,3108,3108,3
Max/min working pressure - Heating bar3 / 0,63 / 0,63 / 0,6
Max/min working pressure - DHWbar6 / 0,66 / 0,66 / 0,6
Working temperature - HeatingoC30-80 (60 pentru încălzire în pardoseală)  
Working temperature - DHWoC35-60  
Class NOxclass6  
Electrical consumptionW9-75  
Electric protection indexIPX4D  
Dimensions (HxWxL)cm76x40x3276x40x3276x40x32
Weight (without chimney)kg394041
Hydraulic group material-Bronze  
Gas pressure min/nominal/maxmbar10 / 20 / 60  
Fuel consumption min/mid/maxm3/h0,45 / 1,1 / 2,380,5 / 1,2/ 3,050,6 / 1,4 / 3,40
Heating/gas connectionsinch3/4"  
DHW connectionsinch1/2" 

CALOMA Comfort Technologies

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Contact Info

Address Drumul Osiei 57-59, sector 6 062395 Bucuresti, Romania
+40 21 352 5522
+40 21 352 5524


+40 372 722 796

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