Ecocondens Slim


New ECOCONDENS SLIM gas condensing boiler is a technically advanced, reliable and efficient device. Wide modulation range makes it a perfect solution for houses and flats with small areas and low heat demand, while ensuring a high level of sanitary comfort (L class). Compact dimensions of the boiler (depth of only 250 mm!) predispose it to be installed e. g. into cabinets, which allows to optimize available space.

FREEPHONE: 0800 689 3538

Boiler Overview

  • energy class: A
  • Easily convertible from COMBI to LPG by simple settings change
  • heat exchanger made of stainless steel
  • wide range of modulation: from 13% to 100%
  • high efficiency circulation pump
  • stepless speed regulation fan (controlled electronically)
  • cylinder burner made of stainless steel – low level of NOx emission (6th class)
  • domestic hot water cylinder by 3-way valve (refers to system boilers)
  • complete protection system
  • optimization of boiler operation is possible due to application of:
    • outdoor temperature sensor
    • temperature regulator: ON/OFF, Open-Therm or 0-10V,
    • ROUND system for remote boiler control via smartphone,
    • EVOHOME system for remote control of up to 11 heating zones
    • ready-to-use multi-zone modules for controlling up to 3 SIM heating systems
  • boilers can also cooperate with:
    • heat pumps air/water
    • solar panels


Thermal power (at temp. 80/60°C) 2,7 – 20,0 kW
Thermal power (at temp. 50/30°C) 3,0 – 22,0 kW
Heat load 2,8 – 20,4 kW
Seasonal space heating energy efficiency ηs 94 %
Efficiency of the boiler at nominal load and average
boiler water temperature of 70°C
97,6 %
Efficiency of the boiler at partial load
and return water temperature of 30°C
107,9 %
Seasonal space heating energy efficiency class A
Useful heat output at rated thermal power P4 (for modulated
boilers – arithmetic mean of min and max)
20,0 kW
Useful heat output at 30% of rated power P1 (for modulated
boilers – 30% of arithmetic mean)
6,0 kW
Efficiency η4 88,0 %
Efficiency η1 97,0 %
Max water pressure 3 bar
Max CH temperature 95 °C
Standard adjustable temperature 20 – 80 °C
Pump head at 0 flow 0,6 bar
Nominal boiler thermal power (at temperature 80/60°C) 2,7 – 25,0 kW
Nominal heat load 2,8 – 25,6 kW
Efficiency of the boiler at nominal load and average boiler water temperature of 70°C 97,6 %
Water pressure 0,1 – 6,0 bar
Minimal water flow 2,0 dm³/min
Domestic water flow at Δt=30K 12,0 dm³/min
Energy efficiency class of water heating A
Load profile L
Range of water temperature regulation 30 – 60 °C
Sound power level LWA 48 dB
Emission of nitrogen dioxide 21 mg/kWh
Emission class of nitrogen dioxide (NOx) 6
Expansion vessel capacity 6 dm³
Standby mode power consumption PSB 0,005 kW
Electricity consumption at full load elmax 0,05 kW
Electricity consumption at partial load elmax 0,02 kW
Type and supply voltage ~ 230 ±10%/ 50Hz V
Protection degree IPX4D
Heating water and gas connection G 3/4 inch
Dimensions 777 x 400 x 250 mm
Weight 32,5 kg
Domestic water connection G 1/2 inch
Heat exchanger material stainless steel

The mobile App Comfort Version and the mobile app Service Version diagram show just how easy it is for you to connect to and control your boiler and heating system, monitor the operation of the boiler against the service parameters and diagnose any error codes.

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Your Ecocondens Slim boiler is just a couple of clicks away!