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SL350OD Summit Outdoor Stairlift by Harmar

The SL350OD Summit Outdoor Stairlift stands out because it’s purpose-built for the outdoors, not just adapted for it. We love how the durable aluminum track and marine-grade vinyl seating are designed to withstand harsh weather conditions while still providing a smooth, reliable ride. Thoughtful details like full weather protection covers, easy-to-use controls, and a space-saving fold-up design make it practical for everyday use without compromising safety or convenience. It’s a dependable solution for maintaining independence and safe access to outdoor spaces year-round.

"I needed something that could handle the weather without constant maintenance, and this stairlift has been perfect. It works smoothly and gives me confidence using my outdoor stairs again." – Daniel F., White Marsh, MD

    • Weight Capacity: Supports up to 350 lbs for tracks up to 15’9″ and 250 lbs for extended track lengths up to 25′.
    • Compact Seating Design: Comfortable 17.5″ x 14″ seat with a 9.5″ x 10″ footrest for secure positioning during travel.
    • Smooth Performance: Travels at 20 feet per minute with a dependable cable drive system for consistent operation.
    • Space-Saving Profile: Folds to just 14″ from the wall to keep outdoor stairways clear when not in use.
    • Flexible Installation: Designed for outdoor use with track lengths ranging from 16′ to 25′ and incline limits between 35° and 45°.
    • Battery-Powered System: Operates on 24V AC power for reliable performance in outdoor environments.
    • Built-In Safety Features: Includes seat belt, slack cable brake with switch, swivel seat cut-off switch, footrest obstruction switch, and constant pressure controls.
    • Customizable Options: Available with key lock and extra rail extensions.
    • Warranty Coverage: Includes a 2-year parts warranty for added peace of mind.
    • Certified Safety Standards: CSA B44.1/ASME A17.5 and ASME A18.1 safety compliant for residential use.

The Summit SL350OD Outdoor Stairlift features a durable, weather-resistant seat designed specifically for year-round outdoor use. Constructed with marine-grade vinyl upholstery, the seat resists rain, wind, snow, and temperatures ranging from 0°F to 125°F, making it an excellent choice for porches, decks, garages, and outdoor entryways. When not in use, the chair folds to just 14 inches from the wall, helping keep your outdoor staircase accessible for family and guests.

Outdoor Seat Features

  • Durable marine-grade vinyl upholstery designed to withstand outdoor conditions
  • Engineered for year-round use in temperatures from 0°F to 125°F
  • Comfortable 17.5" × 14" padded seat provides reliable everyday support
  • Compact folding design stores to just 14 inches from the wall
  • Folding armrests and footrest help maximize available stairway space
  • Standard swivel seat with safety cut-off switch allows for safer entry and exit at the top landing
  • Integrated seat belt provides added rider security
  • Ergonomic constant-pressure rocker control built into the armrest immediately stops the lift when released for enhanced safety
  • Footrest obstruction switch automatically stops the lift if an object is detected on the stairs
  • Includes a large weatherproof cover to help protect the chair and controls when the stairlift is not in use
  • Weather-protected header and internal chassis covers provide additional protection from the elements
  • Designed specifically for outdoor residential applications while delivering the same dependable comfort and ease of use expected from Harmar stairlifts



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