COOLECH Windowless Air Conditioner w/ 4 Modes & 3 Speeds, Waterless Alert, 2.4-Gal Tank for 20H Cooling, 12H Timer, 20FT Remote, 70° Auto Swing Evaporative Air Cooler, Portable AC Unit for Bedroom

A compact cooler that respects physics and your power bill

I’ve been living with the Coolech evaporative cooler for a few weeks, moving it between a small bedroom, a home office, and a 200-ish sq ft living room. It’s a windowless, hose-free unit that pulls warm air through a wetted cooling pad to deliver a cooler, more humid breeze. That means it isn’t a compressor-based AC and won’t dehumidify your space; instead, it does the opposite—adds moisture while dropping the apparent temperature. In dry climates, this can feel fantastic. In humid places, it’s closer to a well-designed fan with a hint of cool.

Setup and design

Out of the box, setup took minutes. It’s a slim tower—roughly 9 x 10 x 24 inches in a neutral gray—so it slides next to a desk or nightstand without hogging floor space. The 360° swivel casters roll smoothly on hard floors, and the integrated handle makes short moves easy. Coolech includes a detachable 2.4-gallon tank with both top-fill access and a bottom reservoir you can pull out to drain and clean. The visible water level indicator is simple but helpful; I always knew whether I had enough to get through the night.

Build quality is better than I expected at this price: panels align, the tank seats cleanly, and nothing rattled even at higher fan speeds. It’s still mostly plastic, but the fit and finish give it a purpose-built appliance feel rather than a flimsy gadget.

Controls that get out of the way

The interface is straightforward: a responsive LED touch panel on top and a remote that worked reliably from across my living room (around 15 feet). You get four modes—Normal, Natural (breeze that varies speed), Sleep (quieter profile), and Cooling (engages the water pump)—and three fan speeds. Between the modes and speeds you can dial in 12 combinations, but in practice I stuck to Cooling/Low at night and Cooling/Medium during the afternoon.

The 70° oscillation covers a couch and coffee table area well, and the louvers can be aimed to avoid a direct blast while still washing the room with air. The 12-hour timer is exactly what it should be: set-and-forget. I used it most nights so the unit shut off near wake-up.

One thoughtful touch is the waterless alert. When the tank runs low, it beeps (briefly) and switches itself from Cooling to a fan-only breeze so the pump isn’t running dry. It saved me a few times during long workdays.

Cooling performance in the real world

In a dry environment, the Coolech performs like a much bigger appliance. On a 90°F afternoon with indoor humidity around 25%, setting it to Cooling/Medium and adding the included ice packs to the tank produced a brisk, comfortable airstream that made my office feel several degrees cooler within minutes. You can’t expect it to drop the entire room temperature the way a sealed AC would, but the combination of increased air movement and evaporative effect meaningfully reduces the perceived heat. Stand a few feet in front of it and the difference is obvious; sit 10–12 feet away and it still feels like a fresh breeze rolling through.

Airflow is substantial for the size. The spec claims up to 1320 CFM; while I didn’t lab-test that, the throw is strong enough that I rarely needed High unless I was trying to flush a room quickly. For spaces up to about 250 sq ft with decent ventilation (a cracked window or an open doorway helps), it handles spot and zone cooling well. If you live in a tightly sealed space, give it a little fresh air so the evaporative process can keep working efficiently.

In humid conditions, the story changes. As relative humidity climbs past 50–60%, evaporative cooling loses effectiveness. In my coastal trial (70°F outside, 65% RH), Cooling mode still felt pleasant right in the airstream, but the room as a whole didn’t get notably cooler, and the added moisture could feel a bit clammy. In those scenarios, using it as a high-quality fan in Normal or Natural mode makes more sense.

Night mode and noise

The noise profile is bedroom-friendly. On Low and Sleep modes, the unit produces a soft whoosh that blended into the background for me—Coolech cites 40 dB, and subjectively it’s no louder than a quiet box fan. Medium adds a bit more airflow noise but remains office-appropriate for calls. High is audible but not harsh, more like a strong tower fan. I didn’t notice motor whine or pump gurgle once the system was primed.

The timer is ideal for overnight use, and the oscillation keeps the air from feeling stale without blasting a jet of cold at your face.

Water management and maintenance

With a 2.4-gallon tank, runtime is generous. On Low, Cooling mode ran through the night and deep into the next day. On Medium, I usually got a full workday plus evening. Top fill is convenient for daily use—pitcher in, done—while the detachable bottom tank makes it easy to drain and wipe down. If you have hard water, a quick weekly rinse helps keep mineral buildup off the tank and pad. I also appreciated that the unit keeps running as a fan when the water runs out; you don’t get an abrupt stop in the middle of the night.

Pro tip: the included reusable ice packs do give the initial airflow an extra crispness, especially in dry heat. They’re not magic, but they’re worth freezing.

Energy footprint

At a rated 65 W, the Coolech sips power compared to compressor-based portable ACs that often draw 800–1200 W. That difference shows up on the bill if you run it for hours every day. There’s also no installation, no window kit, and no hot exhaust to manage, which simplifies life in rentals or rooms without suitable windows.

Limitations to consider

• It’s not an air conditioner in the technical sense. If you need precise, sustained temperature drops in a sealed space, a true AC is the right tool.
• Performance is humidity-dependent. Above roughly 50–60% RH, expect “nice fan with a cool edge” rather than “room feels much cooler.”
• The waterless alert beep is brief but audible. If you’re extremely noise-sensitive at night, keep an eye on the level indicator before bed.
• A full 2.4-gallon tank adds weight. The wheels help, but carry it empty if you need to lift it between floors.
• Oscillation is 70°, which is enough for most setups, but larger living rooms may need you to reposition it to cover multiple seating zones.

Who will get the most from it

• Dry or semi-arid climates where evaporative cooling shines.
• Bedrooms, offices, and studio spaces up to about 250 sq ft, especially with some fresh air exchange.
• Renters and anyone who can’t (or doesn’t want to) install a window kit or vent hose.
• People looking for low operating costs and simple maintenance.

If you’re in a humid region and want actual dehumidification and consistent whole-room temperature control, look elsewhere or pair this with a dehumidifier and smart ventilation. Otherwise, this is a practical way to make hot days and stuffy nights more comfortable without the installation and energy costs of AC.

Recommendation

I recommend the Coolech evaporative cooler for anyone in a dry or mixed climate who wants effective spot and room cooling with minimal fuss and very low energy use. It’s easy to live with, quiet enough for sleep, and the thoughtful touches—top-fill tank, waterless protection, usable remote, and a sensible set of modes—make daily operation simple. Just set expectations correctly: this is a well-executed evaporative cooler, not a compressor AC. Use it with some ventilation, drop in the ice packs on the hottest days, and you’ll get a fresh, comfortable breeze that belies its small footprint. In humid climates, treat it as a capable, quiet fan first and a cooler second.