Central heating solid fuel boiler K-2-20

Where to buy

Multipurpose bottom combustion solid fuel boiler
High efficiency (82%)
Large fuel load (136 dm³). Logs length 0,4 m
Fuel is loaded from the front or top
Automatic adjustment of boiler temperature
Secondary air supply
Secondary burning chamber with refractory concrete catalyst
Smoke exhaust, ignition and draught dampers
Fire grates shaking mechanism
Heat exchanger cleaning from both boiler’s sides
Emergency cooling coil
Possibility to install smoke exhauster
Possibility to mount pellets burner
Housing inner wall steel plate thickness – 6 mm
Warranty for boilers frame 4 years

Description	Characteristic
Nominal output, kW	20
Heated area, m² *	B class premises 172 – 420 C class premises 92 – 220
Fuel used	wood logs **
Efficiency (firing wood logs), %	82
Combustion chamber volume, dm³ (l)	136
Fuel load combustion duration, up to, h. ***	10 – 14
Logs size, not greater than, cm	40
Water volume in the boiler, l	72
Flue diameter, mm	Ø160
Minimum chimney draught, Pa	19
Overall dimensions, HxBxL, mm	1350x770x1210
Mass (brutto), (± 10 %), kg	360

* Energy efficiency according STR 2.01.02:2016.
** It is also possible to use wood waste, sawdust and peat briquettes.
It is not recommended to burn firewood with a moisture content greater than 25%.
*** The burning time of the fuel boiler depends on the type of fuel, humidity, outdoor temperature and other factors.

Dimensions

Cooling coil
Smoke removing damper
Ignition damper
Flue and draught damper
Exhauster mounting place
Secondary air supply inlet
Soot cleaning covers
Burning chamber’s refractory bricks
Ashtray’s drawer
Fire grate shaker
Fire grates
Draught regulator

Schemes

A part of recommended boiler connection circuit, execution of which ensures long-term boiler operation,
prevents from condensate formation inside the boiler.
Circuit shows no auxiliary technology equipment (valves, expansion vessel etc.)

Central heating solid fuel boiler K-2-20

Kalvis, UAB

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