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Lennox S Series® RTU (STA).
Packaged Rooftop Unit
The Most Energy-Efficient Rooftop Unit in the Industry.
Energy Efficiency
Integrated Modular Controller – Digital accuracy and enhanced unit performance with over 200 unit control functions. Impressive diagnostic capability provides simple troubleshooting to reduce operation and service cost. Multiple Compressors – allow the unit to provide efficient cooling with four cooling stages. Heating Section – multiple gas valves and electric heating elements allow unit to provide up to four heating stages. Optional modulating gas provides excellent temperature control with a gas heat operating range between 25% and 100%. Stainless Steel Heat Exchanger – provides application flexibility and allows operation at low outdoor air temperatures. Optional Spring Isolation – helps reduce noise by isolating components using two-inch vibration isolation springs. Optional Integral Energy Recovery Wheel – saves energy and reduces unit size needed for outdoor air ventilation. Optional Humiditrolฎ Dehumidification System – improves indoor environmental quality (IEQ) through an innovative dehumidification system capable of removing moisture based on actual humidity levels. Optional Phase Monitor – prevents damage to electrical components from single phasing, phase reversal and low voltage conditions. Optional High-Efficiency Filters – improve air filtration for better IEQ. Optional Integral Economizer – saves energy by using outdoor air for cooling when suitable. Optional Hot Gas Bypass – allows unit operation in low air flow applications. Optional Outdoor Air CFM Control – helps maintain outdoor air volume for variable air volume units.
Quick, easy installation and maintenance
Step-in Blower Compartment – improves access and reduces maintenance time. Full Perimeter Base Rail – provides greater structural integrity so the unit is easier to handle when rigging and transporting. Independent Motor Mount – allows for easy, efficient access without removing top panel. Coil Cleaning Access Door – improves internal coil access for better cleaning. Slab Condenser Coil – permits faster, more thorough coil cleaning. Removable Drain Pan – improves cleanability and IEQ. Optional Double-Wall Construction – improves cleanability of internal surfaces for better IEQ. Optional Integral Power Exhaust Fan – standard or high static power exhaust fans and modulating capability provide powerful and precise building static control.
Reliable performance
Hinged Toolless Access Panels – provide quick access to components and protect panels and roof from damage during service. Corrosion-Resistant Cabinet – G-90 galvanized steel cabinet under a two-layer surface protects against rust and corrosion. Louvered Grill – protects coil from damage during installation, high wind and hail. Enhanced Panel Design – provides rain, wind and hail protection of internal components.
Warranty
15-Year Limited Warranty on stainless steel heat exchanger. 10-Year Limited Warranty on aluminized heat exchanger. 5-Year Limited Warranty on compressor. 3-Year Limited Warranty on Integrated Modular Controller. 1-Year Limited Warranty on covered components.

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