SlimKool Series (Narrow Width) SP28NEMA 4 or 4X Air Conditioners

The SlimKool Series SP28NEMA air conditioners deliver precision cooling in a compact, narrow-width design specifically engineered for electrical enclosures and sensitive equipment installations requiring NEMA 4 or 4X protection. These units feature a fully gasketed, leakproof construction that maintains strict NEMA 12, 3R, and 4/4X ratings per UL50 standards, ensuring the enclosure interior airflow system remains completely isolated from ambient conditions. The closed-loop cooling design prevents ambient air and moisture from invading the cool, dehumidified sensitive component compartment, protecting critical electronics from contamination and thermal stress.

The built-in condensate evaporator eliminates the need for external drainage under normal operating conditions, simplifying installation and reducing maintenance requirements, though an overflow condensate drain fitting and hose are included for applications experiencing extremely high humidity or open enclosures. The unit utilizes environmentally responsible CFC-free R134a refrigerant and incorporates a compressor short cycle protector that prevents damage from frequent restarts caused by low heat loads, power interruptions, or fluctuating enclosure conditions. This protection is especially valuable in installations subject to solar gain or those specified with larger capacity units in anticipation of future equipment additions. Condenser impeller cycling control further optimizes energy efficiency and compressor longevity by modulating fan operation based on cooling demand.

Construction features a heavy-duty steel shell with ANSI 61 gray polyester powder coating, with stainless steel cabinet options available for NEMA 4X models in corrosive or hostile environments. Both the epoxy-coated condenser and evaporator coils withstand 1000 hours of salt spray per ASTM B 117 test methods, while NEMA 4X models include internal corrosion protection on brazed refrigeration joints for enhanced durability. A multi-layer corrugated aluminum filter with sturdy one-piece frame keeps internal components clean, with replacement filters readily available. All units include programmable thermostat and temperature alarm functions for precise temperature management and early alert capabilities. The SlimKool Series is UL/CUL Listed and CE Compliant, meeting rigorous safety and performance standards for global industrial applications.