Boiler Defro Optima HG 19 kW
The HG boiler uses a two-stage combustion technique – gasification of the fuel and subsequent pyrolysis, i.e. combustion of the resulting gases. The basic fuel is firewood. The boiler exchanger is made of high-quality, certified boiler sheet metal with a thickness of 6-8 mm in the form of two chambers placed above each other – the upper one, which serves as a fuel tank, and the lower one – combining the functions of the combustion chamber and ash pan. There is a grate between the chambers, which allows for perfect gasification of wood and easy removal of ash. The wood gasification process allows full use of the energy stored in the fuel and meets restrictive emission parameters. The combustion process is regulated by an innovative controller with a touch display. The HG boiler has a built-in exhaust fan that prevents smoke from returning to the boiler room. The boiler can be installed in a closed system.
- 5th grade: 19, 25, 32 kW
- Energy efficiency class: A+
- Fuel: firewood - humidity ≤ 20%
- Optional equipment - for an additional fee: OPTIMA HG controller, leveling feet, mechanical exchanger cleaning system, boiler maintenance tools
Boiler specification/type | J.m. | 19 | 25 | 32 |
Fuel |
| hardwood log – birch Ø12 cm | hardwood log – birch Ø12 cm | hardwood log – birch Ø12 cm |
Min. safe capacity of the accumulation tank | l | 700 | 1200 | 1400 |
Heating surface | m2 | 1,6 | 2,0 | 2,4 |
Area of heated rooms | m2 | do 150 | do | do 250 |
One-time fuel filling | kg | ~14 | ~24 | ~27 |
Thermal efficiency for nominal power | % | 92,3 | 92,2 | 92,4 |
Energy efficiency class |
| A+ | A+ | A+ |
Max. permissible working pressure | bar | 3 | 3 | 3 |
Required exhaust gas draft | Pa | 17 | 17 | 18 |
Supply water temperature min/max. | °C | 70/90 | 70/90 | 70/90 |
Boiler weight | kg | ~430 | ~510 | ~540 |
Boiler water capacity | l | 95 | 110 | 120 |
Diameter of the supply/return connection | cal | 1 ½ ’’ | 1 ½ ’’ | 1 ½ ’’ |
Flue diameter | mm | 130 | 130 | 130 |
Power supply | V/N/Hz/A | 230/1/50/3,15 | 230/1/50/3,15 | 230/1/50/3,15 |
Maximum power consumption | W | 35 | 35 | 35 |
Dimensions of the filling hole | mm | 380×400 | 380×400 | 380×450 |
Height | mm | 1460 | 1460 | 1560 |
Width | mm | 620 | 620 | 620 |
Depth | mm | 995 | 1155 | 1155 |