Code 4.104 Central heating system with boiler and solar integration (without domestic hot water production at the central unit) Discover
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 4.101 System with traditional boiler, domestic hot water production and storage with solar integration Discover
Code 4.102 System with traditional wall-mounted boiler, domestic hot water production with solar integration Discover
Code 4.302 System with solid fuel and gas-fired boilers (without domestic hot water production) Discover