SereneLife SLACSW538
A large room cooler with a big tank, app control and a remote for dry climates. Judge it by the maker’s 1059 CFM, not the Amazon headline.
Amazon $199.90$199.90
The SereneLife SLACSW538 is the better evaporative cooler overall, rated 3.2 to 2.7. The SereneLife SLACSW538 leads on features, tank and airflow. The Hessaire DC18 costs $41.31 less ($158.59 vs $199.90).
Hessaire DC18
For tailgating, camping or a job site where a tool battery is easier than an extension cord. In a garage with power, a bigger AC only cooler moves more air for the money.
Amazon $158.59$158.59
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the SereneLife SLACSW538 for features (rigid cooling pads, oscillation, remote vs rigid cooling pads), tank (7.9 gal tank vs 2.8 gal tank) and airflow (1,059 CFM vs 900 CFM).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every under 2,000 CFM evaporative cooler; a clear win is highlighted. How we rank explains each one.
| Factor weight | SereneLife SLACSW538 | Hessaire DC18 |
|---|---|---|
| Overall rating | 3.2/5 | 2.7/5 |
| Value 30% | 59 $188.76 per 1,000 CFM ($199.90, 1,059 CFM) | 62 $176.21 per 1,000 CFM ($158.59, 900 CFM) |
| Airflow 25% | 51 1,059 CFM | 40 900 CFM |
| Tank 10% | 74 7.9 gal tank | 10 2.8 gal tank |
| Features 15% | 75 rigid cooling pads, oscillation, remote | 25 rigid cooling pads |
| Warranty 20% | 0 1-year warranty | 0 1-year warranty |
Specifications
| SereneLife SLACSW538 | Hessaire DC18 | |
|---|---|---|
| Cooling | ||
| Airflow | 1,059 CFM | 900 CFM |
| Cooling area | 538 sq ft | 300 sq ft |
| Cooling pads | Rigid cellulose | Rigid cellulose |
| Tank | 7.9 gal | 2.8 gal |
| Hose hookup | No | No |
| Controls and build | ||
| Fan speeds | 3 | - |
| Oscillation | Yes | No |
| Remote | Yes | No |
| Power draw | 140 W | 55 W |
| Weight | 20.7 lb | 17.6 lb |
| Warranty | 1 year | 1 year |
| Released | 2026-01-28 | - |