POWERCOOL HANDY 2026 is a hand-portable air-conditioning unit designed for industrial and disaster-response environments affected by extreme heat and cold. Conventional ACs are often impractical or impossible to install in construction sites, shipyard interiors, tunnels, or emergency shelters due to space or power limitations. Its patented hybrid structure (KR Patent 10-1891965) allows operation as a compact all-in-one device or a split system, providing both cooling and heating. During cooling tests in enclosed spaces, conventional all-in-one portable ACs caused indoor temperature to rise, whereas POWERCOOL HANDY split mode lowered temperature to a safe level within one hour while also reducing noise. The all-in-one mode is suitable for immediate use by connecting power (or an optional battery), while the split mode requires only a quick-connection hose to link the units. Designed for mobility, it can be carried by hand or transported with a dedicated carrying case with wheels.