The major FlexHEAT targets are:

- Development of 1:3 power modulating atmospheric premix metal burners with no water cooling, optimised material composition and pollutants emissions < 50 mg/kWh (state-of-art burners enable 1:2.5 power modulation only with burner-mantle water cooling for flame stabilisation).

- Development of 1:5 power modulating fully-premixed metal burners, optimised material composition and po llutants emissions < 40 mg/kWh (state-of-art reliable burners with these characteristics are mainly manufactured with very high cost materials).

- Achievement of enhanced fuel flexibility, i.e. capability of handling different feed gases (from natural g as, LPG, renewables as biogas - several kinds of biogas will be considered for both burners -, low heating value gas from Western Balkans,...), and reliability (30,000 h and 200,000 thermal cycles).

- A fully-validated modelling/design platform, based on combined CFD modelling of flames and finiteelements modelling of burner stress & strain, mainly aimed at tailoring the burner geometry and the slitsand-holes shape and pattern. Pollutants emission, flame stability and noise generation will also be analysed.

- Model validation will be performed in specific test rigs and in real appliances (validators), assembled and tested by the end-users, where the above targets will be demonstrated.