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Hot water boiler KTP 20

The ROJEK KTP 20 hot water boiler for manual feeding is designed for burning lump wood (emission class 5) and brown coal size "Kostka" (emission class 4). For both types of fuel it meets the EKODESIGN. This type of boiler is very popular with our customers because it is simple to operate and clean. The boiler does not need electricity to operate, it is fanless and without electronics. The boiler can be connected to both the solitary and compulsory circulation with a pump. This type of boiler is not sensitive to fuel quality.

Product code: 1022004

Technical parameters

Rated power20 kW
Boiler width622 mm
Boiler depth550 mm
Boiler height1193 mm
Grate depth350 mm
Height of flue pipe1089 mm
Flue diameter (diameter of the boiler extension)160 (159) mm
Water inlet height293.5 mm
Building depth773 mm
Diameter of water inlet and outletG 2"
Max. diameter/length of logs20 / 33 cm
Volume of combustion chamber47,9 l
Boiler weight261 kg
Efficiency brown coal / wood85 % to 89 % / 78 % to 88 %
Boiler class according to EN 303-54
Boiler emissions according to Commission Regulation (EU) 2015/1189 - lignite fuelEKODESIGN
Energy efficiency class of coalC
Seasonal energy efficiency of coal79 %
Flue gas volume flow - nominal. output146 m3/h
Hydraulic loss of the boiler0,4 mbar
Dimensions of the filling opening - semicircle width x height245 / 230 mm
Volume of water in the boiler body98 l
Maximum operating water pressure2 bar
Minimum operating water pressure0,5 bar
Test water pressure4 bar
Maximum operating temperature90 °C
Prescribed chimney draft brown coal / wood16 Pa - 20 Pa / 14 Pa - 18 Pa
Flue gas temperature at rated output220 - 300 °C
Recommended storage volume800 l

Description of the boiler

The hot water boiler KTP 20 for manual feeding is designed for burning lump wood and brown coal Kostka (40 - 100 mm), calorific value 17 - 20 MJ/kg. For these fuels the boiler meets Class 4 according to EN 303 - 5. Other alternative fuels are short piece wood, briquettes, fresh sawdust, wet wood chips and other wet biomass.

This is made possible by the original design of the boiler, with dual (two-stage) combustion of the fuel, approximately 80% gasification and approximately 20% conventional combustion. Thanks to the combination of both types of combustion, the fuel is perfectly utilized and burnt out. Both primary and secondary air supply can be easily controlled, thus achieving optimum combustion and long fuel burn-out times.
The boiler is constructed of a double steel structure (inner plates 5 mm thick, outer 4 mm) filled with water. The water is also in a solid grate made of heat pipes. This design ensures maximum transfer of heat energy and at the same time prolongs the life of the boiler.

Advantages of KTP boilers:

  • 6-year warranty on the tightness of the boiler body
  • ability to burn a wide range of fuels
  • it is also possible to burn wet fuel or biomass
  • thanks to the double combustion, the mixture is perfectly burnt through, thus suppressing the formation of harmful emissions and condensates
  • the boiler is designed for a small chimney draft of 15 - 20 Pa, therefore it does not need an electric exhaust fan to operate
  • the boilers are equipped with an after-cooling loop (overheating protection) and allow operation both on the heating water circulation alone and on forced circulation
  • thetemperature of the return water can drop to 55º C, this is made possible by the fact that the return water is fed back into the boiler directly into the tubular grate of the fireplace
  • flue gas temperature 220 - 300 °C
  • the boiler can be connected without a storage tank if operated at rated output

KTP boilers meet emission Class 4 and can be used after 2022.

A quality pellet burner assembly can be added to this KTP 20 manual feed boiler to make it a fully automatic KTP 20 PELLET boiler.

You will definitely appreciate this product

Rear side of the boiler with vertical smoke extraction

Rear side of the boiler with horizontal smoke extraction

KTP boiler weldment

Ceramics in KTP boilers

KTP scheme

Accessories

Downloads

pdf Katalog-TT-Rojek-082022 (Katalog-TT-Rojek-082022.pdf) Download
pdf ROJEK KTP biomasa a uhlí letak (ROJEK KTP biomasa a uhlí letak.pdf) Download
pdf Cenik-TT-15022024-ROJEK-CZ-pred-po (Cenik-TT-15022024-ROJEK-CZ-pred-po.pdf) Download
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