4wood are now supplying and fitting systems from the sophisticated range of ecological, environmental and economic, HDG wood-fueled boilers.

With a choice of systems suited to match just about every situation :
below is an example of one such model.

Features of the HDG Navora 25kW

Fuel
Spit log wood up to half-metre lengths (19"),
Pressed wood briquettes,
Coarse cuttings and lumped wood waste

Area of application
Private households,
Agriculture and forestry
Commercial businesses

Properties
Front-loading,
155 litres fuel chamber volume,
HDG Lambda-Control,
Automatic cleaning, integrated ash box,
Down-burning combustion technology

Benefits
Very user-friendly and convenient,
Very long intervals between refills,
Low emissions

Special features
91 % efficiency,
Automatic cleaning of heat exchanger surfaces upon operation of the bypass damper,
Operated entirely from the front,
Meets the missions controls and safety requirements of most European countries,
Awarded the German KWF prize for innovation

Combustion-controlled, bottom-burning wood boiler.
Pressure-tested, welded furnace body made of 5-6 mm tested boiler steel, fully lined filling chute (with heat-resistant special steel panels at particularly exposed points), sheet steel furnace lining, pre-assembled, powder-coated in green.

Large fueling chamber (150 liters, 560 mm deep) for logs up to 500mm and coarsely chopped wood for long refill intervals; highly temperature-resistant burn-off nozzle with special downstream combustion chamber for minimum emissions and maximum efficiency; power-controlled suction draught ventilator with servo drive for separate primary and secondary air control; oxygen and flue temperature sensors fitted ready to plug in; ergonomic design for convenient fueling using the large front hatch.