Lasko Ascend OST105 Review: Slim 36-Inch Quiet Tower Fan
Lasko's Ascend OST105: 29 ft/s airflow and a 40 ft distance from a slim 36-inch frame, a 29 dBA low setting, AirSense temperature sensing, a mesh filter and a child lock.
By Daniel Brooks
Updated October 22, 2026
The Lasko Ascend OST105 packs 29 ft/s of airflow and a 40 ft air distance into a slim 36-inch frame with an 11 by 9.7 inch footprint that fits beside a nightstand or desk. Lasko rates it at 29 dBA on low, and AirSense reads the room temperature to set the speed in Auto mode. It is our slim bedside pick on our list of tower fans, with a 4.0 out of 5 average from 390 ratings.
Our Verdict
The Ascend brings Lasko’s newer features, AirSense, a mesh filter, a child lock and a 12-hour timer, to a compact fan that suits bedrooms and nurseries. Its four wind modes (Custom, Auto, Nature and Night) cover day and night use, and the remote stores on the fan.
With only four speeds, it has fewer steps than Lasko’s Pinnacle, there is no app, and its ratings average is lower than Lasko’s long-running models.
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | Lasko |
| Model | OST105 (Ascend) |
| Type | Oscillating tower fan |
| Height | 36 inches |
| Footprint | 11 x 9.7 inches |
| Airflow | 29 ft/s, 40 ft distance |
| Speeds and Modes | 4 speeds, 4 modes (Custom, Auto, Nature, Night) |
| Noise Level | 29 dBA low speed |
| Oscillation | 90 degrees |
| Timer | 12 hours |
| Extras | Mesh filter, child lock, remote storage |
| Controls | Remote, LED touch panel |
| Safety | Blue Plug fuse |
Airflow in a Slim Frame
Lasko rates the Ascend at 29 ft/s with a 40 ft air distance and 90 degree oscillation, which circulates air across a bedroom, living room or home office. That is strong airflow for a fan with an 11 by 9.7 inch footprint.
At 36 inches tall, it blows at mattress and desk height, ideal for a bedside or desk spot.
Noise and Night Mode
At 29 dBA on low, the Ascend is quiet enough for conference calls, TV and sleep. Night mode is the one to use at bedtime, and the 12-hour timer switches the fan off on schedule.
AirSense and Modes
In Auto mode, AirSense AI senses the ambient temperature and adjusts the fan’s four speeds automatically. Custom holds your chosen speed, Nature varies the airflow and Night keeps it gentle.
Filter and Family Features
A mesh filter captures pet hair, dust and lint to keep internal parts clean, a real benefit in homes with pets. The child lock prevents little hands from changing settings, the EZGrip handle makes it easy to carry, and the remote has onboard storage.
Lasko’s Blue Plug safety fuse cuts the current if it detects an electrical fault.
How It Compares
Against Lasko’s Pinnacle DST100, the Ascend is slimmer and shorter and costs less, while the Pinnacle is quieter at 24 dBA, stronger at 32 ft/s and offers 12 speeds.
Against DREO’s slim 36-inch tower, the Lasko adds AirSense, a filter and a child lock, while the DREO has the smaller 8 inch footprint and a larger ratings base.
Who It Suits Best
The Ascend is a strong match for a bedroom or nursery in a home with pets, where the filter and child lock earn their keep and the slim body fits beside the bed.
Setup and Everyday Use
Set the Ascend beside the bed or desk, choose Auto mode during the day and Night mode at bedtime, and start the 12-hour timer. The remote lives in its onboard storage, so it does not get lost.
Rinse or vacuum the mesh filter every few weeks, more often if you have shedding pets, to keep airflow strong and the fan quiet.
Pros and Cons
| Pros | Cons |
|---|---|
| Slim 11 x 9.7 inch footprint | Only 4 speeds |
| 29 dBA low setting | No app control |
| AirSense Auto mode | Lower ratings average |
| Mesh filter for pet hair | Shorter than living room towers |
| Child lock and 12-hour timer | Filter needs cleaning |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Bedrooms and nurseries | Smart home users |
| Homes with pets | Large living rooms |
| Desks and nightstands | People who want many speeds |
| Families with young children | Tall beds |
For more options, see our picks for the best tower fans for bedrooms and the best Lasko tower fans.
Final Verdict
The Lasko Ascend OST105 puts strong 29 ft/s airflow, AirSense and a mesh filter in a slim 36-inch tower rated at 29 dBA. It is a great bedside fan for pet owners. You can check the current price and details for the Lasko Ascend 36-Inch Quiet Tower Fan (OST105).
Frequently Asked Questions
How quiet is the Lasko Ascend OST105?
Lasko rates it at 29 dBA on low speed.
Does it have an auto mode?
Yes. AirSense adjusts the speed to the room temperature in Auto mode.
Does it have a filter?
Yes. A mesh filter captures pet hair, dust and lint.
How long is the timer?
Up to 12 hours.
How big is the footprint?
It measures 11 by 9.7 inches.
Does the Lasko Ascend have a child lock?
Yes. A built-in child lock prevents settings from being changed.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.