Steel condensing hot water generator, vertical configuration and low heating load. Complete with premix burner featuring very low polluting emissions, with direct flue gas pass through the heat exchanger. Boiler featuring a high water content and very low pressure drop in the water circuit.
Range consisting of three models with heat outputs from 124 kW to 320 kW respectively.

• Flue gas circuit made completely from AISI 316 TI stainless steel. Heat exchanger made from a patented helical shaped tube bundle, designed to optimise heat exchange and condensation of flue gas.
• Premix burner with diffusion grill and metal mesh for microflame combustion. Burner with front combustion featuring compact vertical dimensions to allow water-flue gas heat exchange along the entire length of the heat exchanger. Quick opening system on the combustion chamber (right or left) for inspection and maintenance.
• Boiler control electronics able to manage cascade systems with master-slave logic, domestic hot water production with storage cylinder and heating system pump with outlet temperature compensation.
• Flue gas exhaust from the right and left sides of the hot water generator. 
• Very high efficiency exceeding 109% in certain operating conditions. 
• The large volume of water in the hot water generator means the boiler can be connected to the system without needing low-loss headers and can operate with a maximum temperature difference of 50°C between system outlet and return.
• Double return to the boiler (low and medium temperature) so as to correctly manage two systems at different operating temperatures and guarantee maximum stratification inside the boiler body and maximum unit thermal efficiency.
• The microflame burner ensures combustion with very low polluting emissions. QUADRISTAR is certified class 5 for NOx emissions.
• Microprocessor electronic control of combustion that allows modulation of hot water generator operation down to 20% of maximum output.