La Nordica Termorosa DSA Lean Petra — wood-fired central-heating cookstove of 12.4 kW, of which 4.4 to 6.9 kW is transferred to the water. The Termorosa DSA Lean Petra feeds your radiators and produces domestic hot water, with natural-stone cladding, and heats volumes up to 356 m³. - 12.4 kW nominal output — 4.4 to 6.9 kW-H₂O transferred to the water - Efficiency up to 84% — seasonal efficiency 70% — energy class A - Enamelled 40.6-litre oven - Elegant natural-stone cladding — authentic texture - Prepared for DSA safety (optional DSA valve) - Wood storage compartment + set of cast-iron cooking rings - Flue outlet Ø150 mm — top or rear connection