A clear diagram of a single-pipe heating system showing a boiler, radiators, supply pipe, and return pipe with flow arrows.

Create a clear educational diagram of a single-pipe heating system for a building. Show a boiler connected to a loop of pipe that passes through several radiators arranged in series. Indicate the direction of hot water flow (supply) and return flow using red and blue arrows. Label the main components: boiler, supply pipe, radiators, return pipe. The first radiator should appear hottest (redder), and the last one slightly cooler (light orange or yellow) to illustrate heat loss. Use a simple, clean, and professional style suitable for a technical training infographic. See more