____________________ solar heating refers to the absorption of energy from the sun by pumping a heat-absorbing fluid through special collectors.

Active Solar Heating

A system that uses solar energy to heat a fluid, usually water or air, and then circulates it to transfer heat directly to the interior space or to a storage system for later use.

Heat-Absorbing Fluid

A fluid that absorbs heat during a process, used in various applications such as heating and cooling systems.