IGS-3
Three-pass hot-water boiler
An efficient, reliable and long-lasting heating solution for residential and industrial buildings.
93 - 1,163 kWheat output
93.1%max. efficiency
15 modelsin one series
A three-pass fire-tube hot-water boiler: 15 models, heat output from 80,000 to 1,000,000 kcal/h and efficiency of up to 93.1%.
- Construction
Efficiency in
every detail
- 1350°C
Gas-tightness test of the door insulation
The front door insulation is made of refractory materials, with gas tightness tested at 1350°C
High output
A large combustion chamber, highly conductive heat-exchange surfaces and three passes deliver high output and fuel savings
Fast start-up
Fast start-up and hot-water production
Two-way door
The boiler door can open in either direction
Minimal heat loss
Aluminium foil and high-density insulation keep radiation and heat losses to a minimum
Long-lasting casing
The outer casing panels are made of double-coated pre-painted steel and last for many years
- 15
models in one series
Heat output from 80,000 to 1,000,000 kcal/h, 93 - 1,163 kW.
Model configurator
Pick the output, the boiler follows.
Drag the slider: figures, dimensions and the table follow the selected model.
ModelIGS-3 200
233kWheat output
200,000kcal/hheat output
93.1%efficiency at full load
3baroperating pressure
C = 1630 mm- B · Overall width960 mm
- C · Length1630 mm
- E · Flue outlet961 mm
- Water connection height1358 mm
- Weight (no casing)667 kg
- Water volume350 L
- ØD₁ · Flue250 mm
- ØD₂ · Hot water outDN65 inch / DN
- ØD₃ · Water inDN65 inch / DN
All models
15 models, one series.
Tap a model to see all of its specifications.
IGS-38093 kW80,000 kcal/h92 %1360 mm345 kg
Performance
- Rated heat output
- 93 kW
- Rated heat output
- 80,000 kcal/h
- Efficiency at full load
- 92 %
- Operating pressure
- 3 bar
- Standby loss
- 0.39 %
- Furnace pressure
- 0.8 mbar
- Water-side resistance
- 2 mbar
Dimensions and weight
- B - Overall width (with door)
- 710 mm
- C - Length
- 1360 mm
- Water connection height
- 1135 mm
- E - Flue gas outlet connection height
- 784 mm
- Weight (without casing)
- 345 kg
- Water volume
- 168 L
Connections
- ØD₁ - Flue diameter
- 200 mm
- ØD₂ - Hot water outlet
- 2" inch / DN
- D - Expansion tank outlet
- 1 1/4" inch
- ØD₃ - Water inlet
- 2" inch / DN
- F - Expansion tank inlet
- 1" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3100116 kW100,000 kcal/h92.8 %1520 mm416 kg
Performance
- Rated heat output
- 116 kW
- Rated heat output
- 100,000 kcal/h
- Efficiency at full load
- 92.8 %
- Operating pressure
- 3 bar
- Standby loss
- 0.39 %
- Furnace pressure
- 0.8 mbar
- Water-side resistance
- 3 mbar
Dimensions and weight
- B - Overall width (with door)
- 710 mm
- C - Length
- 1520 mm
- Water connection height
- 1135 mm
- E - Flue gas outlet connection height
- 784 mm
- Weight (without casing)
- 416 kg
- Water volume
- 196 L
Connections
- ØD₁ - Flue diameter
- 200 mm
- ØD₂ - Hot water outlet
- 2" inch / DN
- D - Expansion tank outlet
- 1 1/4" inch
- ØD₃ - Water inlet
- 2" inch / DN
- F - Expansion tank inlet
- 1" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3125145 kW125,000 kcal/h92.8 %1510 mm497 kg
Performance
- Rated heat output
- 145 kW
- Rated heat output
- 125,000 kcal/h
- Efficiency at full load
- 92.8 %
- Operating pressure
- 3 bar
- Standby loss
- 0.3 %
- Furnace pressure
- 0.9 mbar
- Water-side resistance
- 3 mbar
Dimensions and weight
- B - Overall width (with door)
- 810 mm
- C - Length
- 1510 mm
- Water connection height
- 1245 mm
- E - Flue gas outlet connection height
- 879 mm
- Weight (without casing)
- 497 kg
- Water volume
- 272 L
Connections
- ØD₁ - Flue diameter
- 200 mm
- ØD₂ - Hot water outlet
- DN65 inch / DN
- D - Expansion tank outlet
- 1 1/4" inch
- ØD₃ - Water inlet
- DN65 inch / DN
- F - Expansion tank inlet
- 1" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3150174 kW150,000 kcal/h93 %1510 mm530 kg
Performance
- Rated heat output
- 174 kW
- Rated heat output
- 150,000 kcal/h
- Efficiency at full load
- 93 %
- Operating pressure
- 3 bar
- Standby loss
- 0.3 %
- Furnace pressure
- 1.16 mbar
- Water-side resistance
- 4 mbar
Dimensions and weight
- B - Overall width (with door)
- 810 mm
- C - Length
- 1510 mm
- Water connection height
- 1245 mm
- E - Flue gas outlet connection height
- 879 mm
- Weight (without casing)
- 530 kg
- Water volume
- 272 L
Connections
- ØD₁ - Flue diameter
- 200 mm
- ØD₂ - Hot water outlet
- DN65 inch / DN
- D - Expansion tank outlet
- 1 1/4" inch
- ØD₃ - Water inlet
- DN65 inch / DN
- F - Expansion tank inlet
- 1" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3200233 kW200,000 kcal/h93.1 %1630 mm667 kg
Performance
- Rated heat output
- 233 kW
- Rated heat output
- 200,000 kcal/h
- Efficiency at full load
- 93.1 %
- Operating pressure
- 3 bar
- Standby loss
- 0.3 %
- Furnace pressure
- 1.70 mbar
- Water-side resistance
- 6 mbar
Dimensions and weight
- B - Overall width (with door)
- 960 mm
- C - Length
- 1630 mm
- Water connection height
- 1358 mm
- E - Flue gas outlet connection height
- 961 mm
- Weight (without casing)
- 667 kg
- Water volume
- 350 L
Connections
- ØD₁ - Flue diameter
- 250 mm
- ØD₂ - Hot water outlet
- DN65 inch / DN
- D - Expansion tank outlet
- 1 1/4" inch
- ØD₃ - Water inlet
- DN65 inch / DN
- F - Expansion tank inlet
- 1 1/4" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3250291 kW250,000 kcal/h93.1 %1630 mm710 kg
Performance
- Rated heat output
- 291 kW
- Rated heat output
- 250,000 kcal/h
- Efficiency at full load
- 93.1 %
- Operating pressure
- 3 bar
- Standby loss
- 0.24 %
- Furnace pressure
- 1.9 mbar
- Water-side resistance
- 10 mbar
Dimensions and weight
- B - Overall width (with door)
- 960 mm
- C - Length
- 1630 mm
- Water connection height
- 1410 mm
- E - Flue gas outlet connection height
- 1049 mm
- Weight (without casing)
- 710 kg
- Water volume
- 410 L
Connections
- ØD₁ - Flue diameter
- 250 mm
- ØD₂ - Hot water outlet
- DN65 inch / DN
- D - Expansion tank outlet
- 1 1/4" inch
- ØD₃ - Water inlet
- DN65 inch / DN
- F - Expansion tank inlet
- 1 1/4" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3300349 kW300,000 kcal/h93 %1870 mm868 kg
Performance
- Rated heat output
- 349 kW
- Rated heat output
- 300,000 kcal/h
- Efficiency at full load
- 93 %
- Operating pressure
- 3 bar
- Standby loss
- 0.22 %
- Furnace pressure
- 3.0 mbar
- Water-side resistance
- 12 mbar
Dimensions and weight
- B - Overall width (with door)
- 960 mm
- C - Length
- 1870 mm
- Water connection height
- 1410 mm
- E - Flue gas outlet connection height
- 1049 mm
- Weight (without casing)
- 868 kg
- Water volume
- 486 L
Connections
- ØD₁ - Flue diameter
- 250 mm
- ØD₂ - Hot water outlet
- DN80 inch / DN
- D - Expansion tank outlet
- 1 1/4" inch
- ØD₃ - Water inlet
- DN80 inch / DN
- F - Expansion tank inlet
- 1 1/4" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3350407 kW350,000 kcal/h93 %1910 mm1159 kg
Performance
- Rated heat output
- 407 kW
- Rated heat output
- 350,000 kcal/h
- Efficiency at full load
- 93 %
- Operating pressure
- 3 bar
- Standby loss
- 0.21 %
- Furnace pressure
- 2.9 mbar
- Water-side resistance
- 12 mbar
Dimensions and weight
- B - Overall width (with door)
- 1060 mm
- C - Length
- 1910 mm
- Water connection height
- 1632 mm
- E - Flue gas outlet connection height
- 1187 mm
- Weight (without casing)
- 1159 kg
- Water volume
- 700 L
Connections
- ØD₁ - Flue diameter
- 350 mm
- ØD₂ - Hot water outlet
- DN80 inch / DN
- D - Expansion tank outlet
- 2" inch
- ØD₃ - Water inlet
- DN80 inch / DN
- F - Expansion tank inlet
- 1 1/4" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3400465 kW400,000 kcal/h93 %2110 mm1258 kg
Performance
- Rated heat output
- 465 kW
- Rated heat output
- 400,000 kcal/h
- Efficiency at full load
- 93 %
- Operating pressure
- 3 bar
- Standby loss
- 0.2 %
- Furnace pressure
- 2.9 mbar
- Water-side resistance
- 14 mbar
Dimensions and weight
- B - Overall width (with door)
- 1060 mm
- C - Length
- 2110 mm
- Water connection height
- 1650 mm
- E - Flue gas outlet connection height
- 1187 mm
- Weight (without casing)
- 1258 kg
- Water volume
- 790 L
Connections
- ØD₁ - Flue diameter
- 350 mm
- ØD₂ - Hot water outlet
- DN100 inch / DN
- D - Expansion tank outlet
- 2" inch
- ØD₃ - Water inlet
- DN100 inch / DN
- F - Expansion tank inlet
- 1 1/4" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3500581 kW500,000 kcal/h92.6 %2320 mm1526 kg
Performance
- Rated heat output
- 581 kW
- Rated heat output
- 500,000 kcal/h
- Efficiency at full load
- 92.6 %
- Operating pressure
- 3 bar
- Standby loss
- 0.14 %
- Furnace pressure
- 3.3 mbar
- Water-side resistance
- 13 mbar
Dimensions and weight
- B - Overall width (with door)
- 1140 mm
- C - Length
- 2320 mm
- Water connection height
- 1750 mm
- E - Flue gas outlet connection height
- 1198 mm
- Weight (without casing)
- 1526 kg
- Water volume
- 905 L
Connections
- ØD₁ - Flue diameter
- 400 mm
- ØD₂ - Hot water outlet
- DN100 inch / DN
- D - Expansion tank outlet
- 2" inch
- ØD₃ - Water inlet
- DN100 inch / DN
- F - Expansion tank inlet
- 1 1/2" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3600698 kW600,000 kcal/h92.7 %2600 mm1678 kg
Performance
- Rated heat output
- 698 kW
- Rated heat output
- 600,000 kcal/h
- Efficiency at full load
- 92.7 %
- Operating pressure
- 3 bar
- Standby loss
- 0.14 %
- Furnace pressure
- 3.3 mbar
- Water-side resistance
- 14 mbar
Dimensions and weight
- B - Overall width (with door)
- 1140 mm
- C - Length
- 2600 mm
- Water connection height
- 1750 mm
- E - Flue gas outlet connection height
- 1198 mm
- Weight (without casing)
- 1678 kg
- Water volume
- 1040 L
Connections
- ØD₁ - Flue diameter
- 400 mm
- ØD₂ - Hot water outlet
- DN125 inch / DN
- D - Expansion tank outlet
- 2 1/2" inch
- ØD₃ - Water inlet
- DN125 inch / DN
- F - Expansion tank inlet
- 1 1/2" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3700814 kW700,000 kcal/h92.7 %2510 mm1889 kg
Performance
- Rated heat output
- 814 kW
- Rated heat output
- 700,000 kcal/h
- Efficiency at full load
- 92.7 %
- Operating pressure
- 3 bar
- Standby loss
- 0.13 %
- Furnace pressure
- 3.5 mbar
- Water-side resistance
- 15 mbar
Dimensions and weight
- B - Overall width (with door)
- 1360 mm
- C - Length
- 2510 mm
- Water connection height
- 1954 mm
- E - Flue gas outlet connection height
- 1408 mm
- Weight (without casing)
- 1889 kg
- Water volume
- 1500 L
Connections
- ØD₁ - Flue diameter
- 450 mm
- ØD₂ - Hot water outlet
- DN125 inch / DN
- D - Expansion tank outlet
- 2 1/2" inch
- ØD₃ - Water inlet
- DN125 inch / DN
- F - Expansion tank inlet
- 1 1/2" inch
- ØD₄ - Fill and drain
- 3/4" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-3800930 kW800,000 kcal/h92.7 %2685 mm1930 kg
Performance
- Rated heat output
- 930 kW
- Rated heat output
- 800,000 kcal/h
- Efficiency at full load
- 92.7 %
- Operating pressure
- 3 bar
- Standby loss
- 0.13 %
- Furnace pressure
- 4 mbar
- Water-side resistance
- 18 mbar
Dimensions and weight
- B - Overall width (with door)
- 1410 mm
- C - Length
- 2685 mm
- Water connection height
- 2085 mm
- E - Flue gas outlet connection height
- 1469 mm
- Weight (without casing)
- 1930 kg
- Water volume
- 1820 L
Connections
- ØD₁ - Flue diameter
- 450 mm
- ØD₂ - Hot water outlet
- DN125 inch / DN
- D - Expansion tank outlet
- 2 1/2" inch
- ØD₃ - Water inlet
- DN125 inch / DN
- F - Expansion tank inlet
- 2" inch
- ØD₄ - Fill and drain
- 1" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-39001047 kW900,000 kcal/h92.6 %2685 mm2259 kg
Performance
- Rated heat output
- 1047 kW
- Rated heat output
- 900,000 kcal/h
- Efficiency at full load
- 92.6 %
- Operating pressure
- 3 bar
- Standby loss
- 0.13 %
- Furnace pressure
- 4.45 mbar
- Water-side resistance
- 19 mbar
Dimensions and weight
- B - Overall width (with door)
- 1410 mm
- C - Length
- 2685 mm
- Water connection height
- 2085 mm
- E - Flue gas outlet connection height
- 1469 mm
- Weight (without casing)
- 2259 kg
- Water volume
- 1820 L
Connections
- ØD₁ - Flue diameter
- 450 mm
- ØD₂ - Hot water outlet
- DN125 inch / DN
- D - Expansion tank outlet
- 2 1/2" inch
- ØD₃ - Water inlet
- DN125 inch / DN
- F - Expansion tank inlet
- 2" inch
- ØD₄ - Fill and drain
- 1" inch
- ØD₅ - Condensate outlet
- 1/2" inch
IGS-310001163 kW1,000 000 kcal/h92.3 %2450 mm3006 kg
Performance
- Rated heat output
- 1163 kW
- Rated heat output
- 1,000 000 kcal/h
- Efficiency at full load
- 92.3 %
- Operating pressure
- 3 bar
- Standby loss
- 0.13 %
- Furnace pressure
- 4.35 mbar
- Water-side resistance
- 20 mbar
Dimensions and weight
- B - Overall width (with door)
- 1560 mm
- C - Length
- 2450 mm
- Water connection height
- 2160 mm
- E - Flue gas outlet connection height
- 1595 mm
- Weight (without casing)
- 3006 kg
- Water volume
- 2250 L
Connections
- ØD₁ - Flue diameter
- 450 mm
- ØD₂ - Hot water outlet
- DN125 inch / DN
- D - Expansion tank outlet
- 2 1/2" inch
- ØD₃ - Water inlet
- DN125 inch / DN
- F - Expansion tank inlet
- 2" inch
- ØD₄ - Fill and drain
- 1" inch
- ØD₅ - Condensate outlet
- 1/2" inch