Compare radiant energy solar collector and active solar heating system?

A radiant energy solar collector captures solar radiation and converts it into heat, typically using passive methods such as thermal mass or reflective surfaces to distribute warmth without mechanical components. In contrast, an active solar heating system employs mechanical components, such as pumps and fans, to circulate heat-transfer fluids and distribute solar-heated water or air throughout a building. While both systems harness solar energy, the active system generally offers greater control and efficiency in heat distribution, whereas radiant energy collectors are often simpler and less expensive to install.