tfa_raivisStart with the room-by-room heat requirement
A heating system is easier to choose when heat demand, emitter sizes and control zones are considered together. Match radiator or underfloor output to the room and size circulation components for the complete circuit rather than one appliance in isolation.
Think in systems, not single products
Boiler output, radiator size, pump duty, valves, pipework and thermostatic controls all affect comfort and efficiency. Product pages should make dimensions, connections, output and availability easy to compare.
