Which method is considered the most efficient for heating a space with gas?

Radiant heating systems are recognized for their efficiency when it comes to heating a space with gas. This method involves the direct transfer of heat through infrared radiation, making it particularly effective in warming not only the air in a room but also objects and surfaces, therefore providing a more uniform heating experience.

One of the key advantages of radiant heating is that it can operate at lower temperatures compared to forced air systems, allowing for reduced energy consumption while still achieving the desired heat output. Additionally, because radiant systems provide consistent warmth without the drafts or temperature fluctuations often associated with forced air systems, they can result in enhanced comfort levels.

The other options, while they may serve specific purposes in heating or energy transfer, do not match the efficiency and effectiveness of radiant heating systems. Forced air systems can lose heat through ductwork and may cause drafts; electric baseboards can be less energy-efficient especially if relying on electric resistance; and cooling systems, clearly, are designed for air conditioning rather than heating. Thus, the nature of radiant heating, in terms of efficiency and comfort, stands out as the most suitable method for heating spaces with gas.