The Crompton Optimus 100-Litre Portable Desert Air Cooler outperforms the Symphony Sumo 75 XL in capacity, air delivery, and features.
The Symphony Sumo holds 75 litres of water, while the Crompton Optimus holds 100 litres and needs less refilling. The Crompton Optimus delivers 5500 m3/hr. The Symphony Sumo cools the Crompton Optimus better and covers more area with 4200 m3/hr.
The Crompton Optimus has an auto drain function, humidity control knob, and dual water inlets, while the Symphony Sumo does not. The Crompton Optimus has better build quality, 5-wheel support, and mosquito net panels. The Symphony Sumo has a loose fan speed knob and a weak pump.
Comparison Table: Crompton Optimus Vs Symphony Sumo
Powerful air delivery and long air throw.
Large ice chamber for better cooling.
Auto drain function and humidity control.
Swing function with pump on/off option.
Two water inlet options and insect protection.
Sturdy construction and lower noise level.
Airflow only in one direction, air deflector can be irritating.
Wide swing and powerful air throw.
Good cooling performance during breezy and cooler nights.
Sturdy wheel support system.
Plastic 5-blade fans.
Design flaw with wheel support, prone to breaking.
Lower quality honeycomb filters and pump.
No mesh or net over the filters.
Loose fan speed knob and limited speed setting difference.
Crompton Optimus 100-Litre Portable Desert Air Cooler
The cooler’s capacity stands out. The 100-litre water tank lets the cooler run long without refilling. With an air delivery rate of 5500 m3/hr and 230 watts, the cooler efficiently cooled my living space. It was quiet in my room at 30 dB.
Five sturdy wheels make moving the Crompton Optimus cooler easy. It cools 650 sq. ft., perfect for my living room. The air throw was great, reaching 15-20 ft, and the ice chamber was the largest I’ve seen, improving cooling performance.
Auto drain removes 90% of water. I liked the back humidity control knob, which helped me keep the room at the right humidity. Swinging the pump on or off allows air circulation flexibility.
The cooler has two water inlets for tap connection and manual refilling. The cooler’s mosquito-netted panels and collapsible front louvres keep insects out.
The air deflector can be irritating, and airflow is one-way. On flat surfaces, the cooler distributes water poorly. One panel remains dry, which may affect cooling performance.
Symphony Sumo 75 XL
I liked its 75-litre capacity for cooling 400 sq. ft. It delivers 4200 m3/hr and uses 190 watts.
The cooler’s 48 x 70.7 x 107.3 cm dimensions make it manageable in the room. I liked the quietness, which was below 45 dB.
Even on low fan speed, the Symphony Sumo 75 XL performed well in cool breezes. It does not have an auto-fill system, so manual refilling is necessary.
The wide swing and air throw help cool the room. Like the Crompton Optimus, a mesh or net over the honeycomb filters would improve the cooler’s five-bladed plastic fans.
The wheel support system was sturdy, but some design flaws caused broken wheels. The honeycomb filters and pump could have been better.
The fan speed knob was loose, and the speeds weren’t much different. In temperatures above 40°C, instant cooling may disappoint. Sitting by the cooler reduces heat and sweating.
