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

The RAB SWISHAIR1X4/MVS/E is a 1×4 recessed LED air-return troffer with a factory-installed microwave occupancy sensor and integrated 90-minute emergency battery backup, designed for commercial T-grid ceilings requiring HVAC return-air functionality, occupancy-based energy control, 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/MVS/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.
• Microwave Sensor: Factory-installed MVS microwave sensor · 12VDC input · 50/60Hz · operating temperature −22°F to 104°F (−30°C to 40°C) · detects motion through walls and partitions · detection range 20 ft diameter at 9 ft mounting height · max mounting height 9–12 ft.
• 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/MVS/E includes a factory-installed microwave occupancy sensor, 0–10V dimming, and integrated 90-minute emergency battery backup. The MVS sensor emits high-frequency microwave signals to detect fine motion through minor obstructions such as partitions and bathroom stalls. The battery backup activates automatically on power failure, maintaining illumination for safe egress. Battery Backup Light Loss Factor: 0.23. Requires an unswitched hot line to maintain charge. Sensor defaults: Motion Sensitivity High · 100% brightness when triggered · 20-min hold time · 20% standby dim · 1-min standby time · Daylight Disabled. Adjustable via MSR1 remote accessory (sold separately).

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) · maximum ambient 104°F (40°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. MVS sensor recommended mounting height: 9–12 ft.

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

• Restrooms and locker rooms — MVS detection through partitions ensures reliable occupancy sensing; damp location rating, air-return integration, and 90-minute battery backup support safety and code compliance
• Corridors and circulation paths with partitioned alcoves — microwave detection through minor obstructions keeps lights on when spaces are occupied; emergency backup supports egress compliance on power failure
• Healthcare facilities and clinical spaces — 81–84 CRI, MVS sensor, and battery backup support reliable illumination and life-safety compliance during power events
• Educational institutions — selectable wattage, MVS detection, and emergency operation meet energy and safety code requirements for varied room layouts
• Government and institutional buildings — TAA Compliant and DLC 5.1 Ultra-Efficient Premium qualify for GSA procurement and highest-tier utility rebates

What's Included

• RAB SWISHAIR1X4/MVS/E SWISH AIR LED Troffer — White
• Factory-installed microwave (MVS) occupancy sensor
• Integrated 90-minute emergency battery backup unit
• Mounting hardware for recessed T-grid installation