Which type of heating system typically uses a network of pipes?

The correct answer is radiant floors, as this type of heating system utilizes a network of pipes that circulate warm water beneath the floor surface to heat the living space. This approach allows for an even distribution of heat throughout the room, providing a comfortable environment while maximizing energy efficiency. Radiant floor heating can be particularly effective in areas where a consistent and gentle heat is desired, such as in bedrooms or bathrooms.

In contrast, furnaces primarily rely on air to distribute heat, using ductwork instead of pipes. Ventless heaters operate using gas or propane and do not require a network of pipes or ducts; they radiate heat directly into the room. Air conditioners, meanwhile, are focused on cooling rather than heating and utilize a completely different mechanism involving refrigerant and air movement. Thus, radiant floors stand out as the only option that involves a network of pipes for heating the space.