1. Over/under sink unvented type 2. Spcc steel tank, 10 bar pressure tested and exclusive vitreous enamel coating 3. Highly efficient thermal insulation and firm abs housing 4. Anti-proof, anti-corrosion design 5. Knob regulation thermostat 6. 8 bar safety valve with 1/2 copper outlet 7. Space saving wall fixing 8. Simple installation 9. Indicator light