Venta LW45 Comfort Plus vs Dyson Purifier Humidify+Cool Formaldehyde PH04
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In short: The Venta LW45 Comfort Plus costs $470 less; the Venta LW45 Comfort Plus costs about $70 less a year in wicks and watts.
| Spec | Venta LW45 Comfort Plus | Dyson Purifier Humidify+Cool Formaldehyde PH04 |
|---|---|---|
| Approx. price | ~$530 | ~$1,000 |
| Type | Evaporative | Evaporative |
| Mist | cool | cool |
| Rated output | Not published | Not published |
| Output standard | The maker publishes no output rate | The maker publishes no output rate |
| Honest room size | — | — |
| Claimed coverage | 645 sq ft | 400 sq ft |
| Claim vs physics | — | — |
| Tank size | 3 gal | 1.11 gal |
| Runtime at the claimed room | 28 hr | 16 hr |
| Real runtime at full output | — | — |
| Yearly running cost | ~$32 | ~$102 |
| Replaceable media | None — nothing to buy | Filter, replaced through the season |
| White dust risk | No | No |
| Humidistat | Yes | Yes |
| Noise on low | 24 dB | — |
| Top fill | Yes | No |
| Dishwasher-safe tank | No | No |
| App control | No | Yes |
| Power | 8 W | 40 W |
Highlighted cells are the better number in that row, and only where a direction is unambiguous — more output and more supported room, less noise, cost and price. Honest room size and runtime are computed from each maker’s own published figures; here is the calculation.
Pros and cons
Venta LW45 Comfort Plus
- No wick at all, so years of ownership add up to no filters bought
- Eight watts at full speed; the running cost is close to nothing
- Whisper quiet on speed one
- Venta states the 8-foot ceiling behind its coverage figure, which almost nobody else here does
- No published output rate, on the product page or in the manual, so the 645 sq ft claim cannot be checked
- $530 puts it among the most expensive units here, and the payback is measured in years, not seasons
- The disc stack and basin need hands-in-the-water cleaning every couple of weeks
- At $530 there is still no app, no timer and no display beyond the humidity dial
- Thirteen pounds empty and awkward to carry full
Dyson Purifier Humidify+Cool Formaldehyde PH04
- Genuinely replaces three appliances, which is the only frame in which the price is defensible
- The air-quality sensing and readout are the best in this catalog by a distance, because that is Dyson's actual product
- The deep-clean cycle and UV-C stage address the hygiene problem more thoroughly than any other evaporative here
- Backward-airflow mode means it can humidify and purify in winter without blowing cold air at anyone
- No published output rate, which makes the 400 sq ft claim uncheckable - unusual for a company that publishes everything else
- Roughly $90 a year in combined filters, the highest consumable bill of any portable here
- $1,000 buys, as a humidifier, about what a $70 Vornado delivers
- A 1.1-gallon tank in a machine this size and price
- Bottom-fill tank in a unit that weighs 18 lb