RAB SWISHAIR1X4/E SWISH AIR LED Troffer — 35W/26W/18W Selectable — 3500K/4000K/5000K — Battery Backup — White

The RAB SWISHAIR1X4/E is a 1×4 recessed LED air-return troffer with integrated 90-minute emergency battery backup, designed for commercial T-grid ceilings requiring integrated HVAC return-air functionality and life-safety code compliance. Wattage is field-selectable between 35W (factory default), 26W, and 18W, and CCT is field-selectable between 3500K, 4000K (factory default), and 5000K — both via onboard switch, no tools required. At peak output, the fixture delivers 4,923 lumens at 35W / 4000K with a peak efficacy of 153.0 lm/W at 18W / 4000K. The SWISHAIR1X4/E operates on 120–277V with a 0–10V dimming driver and is UL Listed for dry and damp locations and DLC 5.1 Listed as Ultra-Efficient Premium. Replaces conventional fluorescent 1×4 troffer fixtures.

Key Features

• Selectable Wattage: 35W / 26W / 18W — field-adjustable via built-in onboard switch, factory default 35W. No tools required.
• Wattage Equivalency: Replaces conventional fluorescent 1×4 troffer fixtures.
• Maximum Lumen Output: 4,923 lm at 35W / 4000K.
• Peak Efficacy: 153.0 lm/W at 18W / 4000K.
• CRI: 81–84 across all wattage and CCT configurations.
• Selectable CCT: 3500K / 4000K / 5000K — field-adjustable via built-in onboard switch, factory default 4000K. No tools required.
• Air Return Integration: SWISHAIR vented design allows the fixture to serve as a ceiling-integrated HVAC return-air diffuser — eliminates a separate return-air grille in the same 1×4 grid opening.
• Dimming: 0–10V dimming driver — dims to 10% minimum.
• Voltage & Driver: Class 2 constant current, 120–277V, 50/60Hz.
• Location Rating: UL Listed for dry and damp locations.
• Operating Temperature: −4°F (−20°C) minimum standard · 41°F (5°C) minimum with battery backup · 104°F (40°C) maximum ambient.
• Certifications: UL Listed (dry and damp) · DLC 5.1 Ultra-Efficient Premium.
• Rated Life: 100,000 hours per IES LM-80 / TM-21.
• Warranty: 5-year RAB warranty — covers light output, color stability, driver performance, and fixture finish.
• Battery Backup: 90-minute emergency operation on power failure · wired 120–277V · Battery Backup Light Loss Factor: 0.23 · minimum starting temperature 41°F (5°C). Requires unswitched hot line to maintain charge.

Performance & Light Output

At 35W: 4,715 lm (3500K / 137.3 lm/W), 4,923 lm (4000K / 146.9 lm/W), 4,887 lm (5000K / 141.6 lm/W). At 26W: 3,589 lm (3500K / 142.5 lm/W), 3,716 lm (4000K / 150.7 lm/W), 3,719 lm (5000K / 147.0 lm/W). At 18W: 2,455 lm (3500K / 145.0 lm/W), 2,559 lm (4000K / 153.0 lm/W), 2,584 lm (5000K / 151.1 lm/W).

CRI 81–84 across all wattage and CCT settings. Rated life 100,000 hours (L70) per IES LM-80 / TM-21.

Smart & Control Features

The SWISHAIR1X4/E supports 0–10V dimming as standard. The integrated 90-minute battery backup activates automatically on power failure, maintaining fixture illumination for safe egress. Battery Backup Light Loss Factor: 0.23. Requires an unswitched hot line to maintain charge. Battery backup can be combined with sensor options (/PIR/E, /MVS/E suffix SKUs).

Electrical

Class 2 constant current driver. Input: 120–277V, 50/60Hz. Power Factor: 99.6% at 120V / 95.1% at 277V. THD: 6.6% at 120V / 12.5% at 277V. Surge protection: 2kV L-L / 2kV L-N-G. Dimming: 0–10V, dims to 10% minimum. Battery backup: 90-minute emergency operation · wired 120–277V · BLLF: 0.23 · minimum starting temperature 41°F (5°C). Mercury-free, UV-free, RoHS compliant.

Construction

Housing & Thermal: Cold Rolled Carbon Steel Sheets and Strip (SPCC) housing construction.

Lens & Optics: Diffused polystyrene lens panel for uniform, glare-controlled illumination across the full 1×4 grid opening.

Finish: White — formulated for high durability and long-lasting color.

Environmental & Safety: UL Listed for dry and damp locations. Mercury-free, UV-free, RoHS compliant. Operating range: −4°F (−20°C) standard minimum / 41°F (5°C) minimum with battery backup · 104°F (40°C) maximum ambient.

Dimensions & Weight: Ceiling opening: 42¹¹⁄₁₆" × 11¹⁵⁄₁₆". Fixture depth: 1⁷⁄₁₆". Weight: 10 lbs.

Installation & Mounting

Standard Hardware: Mounting hardware included for recessed T-grid ceiling installation.

Mounting Options: Recessed into standard 1×4 T-grid ceiling systems. Recommended ceiling height: 8–12 ft. SWISHAIR vented body serves as the return-air diffuser — coordinate with HVAC layout during installation.

Wiring: An unswitched hot line must be connected to maintain battery charge. Wattage and CCT selections should be confirmed prior to installation. Minimum starting temperature with battery backup: 41°F (5°C).

Certifications & Rebates

• UL Listed — dry and damp locations
• DLC 5.1 Ultra-Efficient Premium — qualifies for the highest tier of utility rebate programs from DLC Member Utilities. To verify rebate eligibility with your utility provider, visit designlights.org and search catalog number S-RV80FX.
• TAA Compliant — eligible for U.S. government and GSA procurement
• RoHS Compliant — mercury-free, UV-free

Typical Applications

• Commercial egress corridors and circulation paths — air-return integration consolidates HVAC and lighting in a single 1×4 grid opening; 90-minute battery backup supports life-safety compliance on power failure
• Healthcare facilities and clinical spaces — damp location rating, 81–84 CRI, and emergency backup support reliable illumination during power events
• Educational institutions — selectable wattage and emergency operation meet both energy and life-safety code requirements
• Government and institutional buildings — TAA Compliant and DLC 5.1 Ultra-Efficient Premium qualify for GSA procurement and highest-tier utility rebates
• Retail environments and lobbies — selectable 3500K–5000K CCT adapts to varied display and ambient lighting needs while maintaining emergency coverage

What's Included

• RAB SWISHAIR1X4/E SWISH AIR LED Troffer — White
• Integrated 90-minute emergency battery backup unit
• Mounting hardware for recessed T-grid installation