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Polski Producent KotłówPolish manufacturer
D E F R O *
360 Defro

Defro Classic

Availability: Discontinued
Boiler type: Hopper-fed boiler.
Available powers: 6, 10, 15, 20, 25 kW
Controller:
Optional equipment - for an additional fee: Leveling feet, draft regulator, DEFRO OPTI air set.
Polish product, manufactured within the European Union. Polish product, manufactured within the European Union.

4 years of warranty for the heat exchanger's tightness, 2 years for other components, and the proper operation of the boiler.

Heat exchanger made from certified, high-quality 6mm steel.

High thermal efficiency reaching 83% thanks to increased heat recovery from exhaust gases.

Mechanical regulation of the combustion process using a knob on the ashpan door.

Secondary air flow regulation.

Factory-ready for the installation of an air set.

Water grate.

Door closing force adjustment.

Designed to work in conjunction with a draft regulator.

Mechanical movable grate for ash removal from water grates - from 10 kW of power.

DEFRO CLASSIC hand-loaded boilers are designed with horizontal flue gas channels, suitable for upper combustion of solid fuels. They are intended for heating buildings with an area of up to 250 square meters. Primary fuel: anthracite coal in nut size. Alternative fuels: a mixture of anthracite coal in nut size and fine size, seasoned wood, and wood waste. The combustion process, using natural air draft, does not require electric power. These boilers operate with the aid of natural air draft, and temperature is mechanically regulated using a knob for the damper in the ashpan door or with a draft regulator (additional equipment).

3 The boiler width is provided with a draft regulator. The draft regulator is not included as part of the boiler’s equipment.

Boiler name DEFRO Classic
Boiler specification/type IU 6 10 15 20 25
Power range kW 1,8-6 3,0-10 4,5-15 6,0-20 7,5-25
Heating surface m2 0,9 1,6 1,7 2,0 2,3
Area of ​​heated rooms 1 m2 Up to 100 Up to 140 Up to 170 Up to 220 Up to 250
Single fuel load. kg ~18 ~21 ~21 ~30 ~41
Optimum thermal efficiency % ~81,3-83,9
Energy efficiency class – D D D D D
Max. permissible pressure

working

 bar 1,5
Required exhaust gas draft Pa 18 20 22 23 26
Supply water temperature max. °C 65/90
Boiler weight 2 kg 161 236 240 273 305
Boiler water capacity l 33 52 55 62 73
Cross-section of the chimney cmxcm 14×14 14×14 14×14 14×14 16×16
Cross-section of the chimney O mm 160 160 160 160 160
Minimum height of the chimney m 5,5 5,5 6 7 7
Width mm 462 550 550 600 600
Depth mm 765 930 930 940 1010
Height mm 1050 1260 1260 1310 1365
Supply and return diameter Dn mm G1 1”
Flue diameter mm 127 159 159 178 178
Hopper chamber dimensions. width

depth

height

width x height

 258

253

250

258 x 188

 258

368

264

258 x 188

 258

368

264

258 x 188

 308

368

315

308 x 328

 308

438

354

308 x 238
Height to the lower edge of the firebox door. mm 795 965 965 1015 1065

1 The maximum heated area estimated for individual heat demand of q=80 W/m².

2 The weight of the boiler depends on the equipment

3 The boiler width is provided with a draft regulator. The draft regulator is not included as part of the boiler’s equipment.

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