Portacool APEX 500
For a small shop, garage bay or patio where floor space and noise matter and you want app control and a long warranty.
Amazon $1,096.37$1,096.37
The Portacool APEX 500 is the better evaporative cooler overall, rated 3.7 to 3.2. The Portacool APEX 500 leads on warranty, airflow and tank. The SereneLife SLACSW538 wins on value. The SereneLife SLACSW538 costs $896.47 less ($199.90 vs $1,096.37).
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
Prices were last checked November 2, 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 Portacool APEX 500 for warranty (3-year warranty vs 1-year warranty), airflow (1,400 CFM vs 1,059 CFM) and tank (13 gal tank vs 7.9 gal tank).
- Choose the SereneLife SLACSW538 for value ($188.76 per 1,000 CFM ($199.90, 1,059 CFM) vs $783.12 per 1,000 CFM ($1,096.37, 1,400 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 | Portacool APEX 500 | SereneLife SLACSW538 |
|---|---|---|
| Overall rating | 3.7/5 | 3.2/5 |
| Value 30% | 9 $783.12 per 1,000 CFM ($1,096.37, 1,400 CFM) | 59 $188.76 per 1,000 CFM ($199.90, 1,059 CFM) |
| Airflow 25% | 73 1,400 CFM | 51 1,059 CFM |
| Tank 10% | 100 13 gal tank | 74 7.9 gal tank |
| Features 15% | 75 rigid cooling pads, oscillation, hose hookup | 75 rigid cooling pads, oscillation, remote |
| Warranty 20% | 100 3-year warranty | 0 1-year warranty |
Specifications
| Portacool APEX 500 | SereneLife SLACSW538 | |
|---|---|---|
| Cooling | ||
| Airflow | 1,400 CFM | 1,059 CFM |
| Cooling area | 1,000 sq ft | 538 sq ft |
| Cooling pads | Rigid cellulose | Rigid cellulose |
| Tank | 13 gal | 7.9 gal |
| Hose hookup | Yes | No |
| Controls and build | ||
| Fan speeds | 5 | 3 |
| Oscillation | Yes | Yes |
| Remote | No | Yes |
| Power draw | - | 140 W |
| Weight | 70 lb | 20.7 lb |
| Warranty | 3 years | 1 year |
| Released | 2023-10 | 2026-01-28 |