Code 4.303 Hybrid system with solid fuel and gas-fired boilers <35 kW, inertial tank with built-in cylinder Discover
Code 4.304 Hybrid system with solid fuel and gas-fired boilers, <35 kW domestic hot water production with storage Discover
Code 4.003 Hybrid system with boiler and heat pump, heating and domestic hot water production with storage Discover
Code 4.004 Hybrid system with boiler and heat pump, heating, cooling and domestic hot water with storage Discover
Code 4.103 Central heating system with boiler and domestic hot water production with storage and solar integration Discover
Code 4.104 Central heating system with boiler and solar integration (without domestic hot water production at the central unit) Discover