Venta Airwasher LW45 Review

Capable of raising humidity levels while tending to eliminate impurities from the indoor air, the LW45 Airwasher is a necessity in households where allergy sufferers and asthmatics reside.

Venta Airwasher LW45 Ratings

DESIGN - 98%



Capable of raising humidity levels while tending to eliminate impurities from the indoor air, the LW45 Airwasher is a necessity in households where allergy sufferers and asthmatics reside.

User Rating: 2.59 ( 96 votes)

For many people, dry indoor air is just as much of a concern as indoor airborne pollutants as either might be the reason why you’re not feeling good when you’re at home. An air purifier and humidifier combo product can raise the humidity level inside your home to a comfortable level while eliminating airborne pollutants that endanger your health at the same time.

This double duty is what the Venta Airwasher LW45 was designed to accomplish. Produced by one of the industry-leading manufacturers at the moment, it’s a promising investment that’s worth considering and is the focus of this review.


  • Purifies and humidifies at the same time
  • Low maintenance
  • Easy to use
  • With a refill indicator
  • No white dust
  • Wide coverage


  • Expensive
  • Not as effective as mechanical filters

Technical Specifications

This 2-in-1 product works well for spaces up to 800 sq. ft. in area. As such, it likely won’t have any problems handling large spaces like the attic or the basement. It should also work well inside homes with open floor plans because of its large coverage.

What makes this model appealing from an economic standpoint is the fact that it doesn’t use any filters. Since it only uses water as filtration media, you can expect hassle-free maintenance and operation. The 3-gallon water reservoir for the humidifier is also pretty sizable, which ensures that you won’t be doing too many refill trips.

In terms of energy efficiency, the unit’s performance relies mostly on the particular speed setting you’re using. At the lowest speed, it consumes 3 watts; when it’s on medium, it consumes 5 watts; and when it’s set on the highest speed setting, it consumes up to 8 watts. Regardless of the setting that you prefer, energy consumption doesn’t seem to be much of an issue with this appliance since these power ratings are pretty standard.

Lastly, another aspect worth mentioning is that it produces only 42 dB of noise while at the highest speed setting, making it an acceptably quiet air purifier-humidifier combo.

Specifications Sheet

Specs LW45
Dimensions 17.7” x 11.8” x 13”
Weight 13 Lbs
Area Coverage 800 Square Feet
Noise Level 24/35/45 dB
Power Consumption 3/5/8 Watts
Fan Speeds Adjustable (3 fan speeds)
Filter Type Filterless
Timer Function No
Warranty 10 Years


As mentioned beforehand, the Venta Airwasher LW45 doesn’t have filters. It simply uses water to remove airborne pollutants like dust, pollen, pet dander, and mold spores from the air. According to Venta, as the air passes through the unit, the said pollutants adhere to the moistened internal Disc Stacks and eventually get stuck. The pollutant-free and humidified air stream continues to pass through until it finally exits the unit and goes back into the room.

While many reviewers have reported feeling improvements in the air while using the Airwasher, it appears to be better-suited as a humidifier than an air purifier. With that said, if you’re a chronic allergy or asthma sufferer or someone sensitive to odors and smoke, you might be better off buying a separate air purifier with True HEPA and carbon filters. True HEPA air purifiers use a thicker glass fiber filter that’s composed of several interlaced layers. This mechanical purification system ensures that 99.97% of particles as small as 0.3 microns are removed from the air passing through the filter. With water-reliant machines like the Airwasher, you simply don’t get to enjoy this kind of guarantee.

The presence of three speed options means you’ll be able to control the level of air purification and humidification produced by the Airwasher. Moreover, since it uses Cold Evaporation technology, indoor humidity level is increased while avoiding the occurrence of white dust. Needless to say, proper humidification of indoor air helps reduce static electricity, aids in the quality preservation of wooden furniture, and makes your home a lot more comfortable for its occupants. What’s more, the Venta LW45 is very low-maintenance. While many other humidifiers require weekly cleaning, this model only needs rinsing every two weeks. Full-blown thorough cleaning, on the other hand, is only necessary every six months.


The Venta LW45 has an automatic shut-off feature that ensures energy efficiency and safe use. It also has a useful refill indicator light that notifies you when the water reservoir requires a refill. Although it doesn’t come with any specific energy consumption-reducing features apart from its auto-off capability, this purification system is designed to be energy efficient — consuming 8 watts of electricity at most. With that said, it’s easy to see why additional energy-saving features like standby mode are unnecessary.


The Venta Airwasher LW45 air purifier and humidifier combo might not be the most appealing product in its niche design-wise, but we appreciate that it’s compact enough to fit in any household without causing too much of a disruption. It measures 17.7 inches in depth, 11.8 inches in width, and 13 inches in height, and it weighs only 13 pounds. This makes it ideal for people who live in large houses and plan on using it in different areas. The portability of the device makes it particularly easy to move around.

It comes in white or black, so you can choose the colorway that best suits your interiors. Additionally, it features a simple design that makes it easy for people of all ages to use.

Warranty and Support

Venta is a reputable appliance manufacturer, so the 10-year warranty offered for the LW45 air purifier and humidifier doesn’t come as a surprise. We appreciate the long warranty as it shows that the manufacturer trusts the product. When confronted with any type of operational difficulty or malfunction, you can contact the customer support department at Venta for a quick solution.

Final Thoughts

If you’re looking for a quick solution to humidity problems and would appreciate better air quality indoors, then the Venta Airwasher LW45 might be the right product for you. It’s a promising pick for people who hate the all-too-common white dust problem that comes with most humidifiers, and the fact that it purifies the air without having to use filters is a plus. However, if you’re dead set on having a purification device that’s powerful enough to get rid of even microscopic particles, bacteria, smoke, and odors, then you might be better off buying a separate air purifier.

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