Introduction
As summer temperatures soar across India, finding an energy-efficient desert air cooler that balances power, affordability, and comfort becomes a top priority. Enter the Crompton Optimus 65, a high-performance desert cooler designed to tackle extreme heat with its 65L auto-fill tank, humidity control, and 5500 CMH airflow. But does this inverter-compatible cooler live up to its promise of “ice-like cooling” for spaces up to 650 sq. ft.?
Unlike traditional air conditioners, which guzzle electricity, the Crompton Optimus 65 consumes just 200W, making it a budget-friendly cooling solution for homes and offices. With features like high-density honeycomb pads, an ice chamber, and auto-drain functionality, it’s engineered for long-lasting cooling even in humid climates. But how does it compare to popular models like the Symphony Sumo 75 or Bajaj DC 55?
In this detailed review, we’ll break down its pros and cons, technical specifications, and price comparison to help you decide if it’s the best desert air cooler for large rooms in 2025.
Key Features of Crompton Optimus 65
- Key Benefits and Features
- Generous 65-Litre Water Tank with Auto-Fill Function: Enjoy extended cooling sessions without frequent refills, thanks to the spacious water tank. The auto-fill feature ensures a continuous water supply for uninterrupted comfort.
- Powerful Air Delivery: With an impressive air delivery rate of 5500 cubic meters per hour, this cooler effectively cools areas up to 650 square feet, ensuring every corner of your room remains refreshingly cool.
- High-Density Honeycomb Cooling Pads: These pads enhance water retention, leading to efficient cooling and improved airflow, providing a comfortable environment even during peak summer days.
- User-Friendly Features: The cooler boasts a large, easy-to-clean ice chamber for an extra cooling boost, and an auto-drain function that simplifies maintenance by draining out water from the tank, ensuring hygiene and convenience.
- Inverter Compatibility: Designed to operate efficiently on inverters, the Optimus 65 ensures continuous cooling even during power outages, making it both energy-efficient and reliable.
Technical Specifications
| Parameter | Details |
|---|---|
| Tank Capacity | 65 Liters |
| Air Delivery | 5500 m³/hr (CMH) |
| Coverage Area | Up to 650 sq. ft. |
| Power Consumption | 200W |
| Voltage | 230V |
| Special Features | Auto-fill, Auto-drain, Ice Chamber, 4-way air vents |
Pros and Cons
Pros:
Massive 65L Tank for Long-Lasting Cooling: The Crompton Optimus 65 features a substantial 65-liter water tank, ensuring extended periods of cooling without frequent refills.
Energy-Efficient (200W) with Inverter Support: Operating at a modest 200 watts, this cooler is designed for energy efficiency and is compatible with inverters, providing uninterrupted cooling even during power outages.
Humidity Control Prevents Stickiness: Equipped with humidity control features, the Optimus 65 helps maintain optimal moisture levels in the air, preventing the uncomfortable stickiness often associated with high humidity.
Powerful 5500 CMH Airflow for Large Rooms: With an impressive air delivery rate of 5500 cubic meters per hour, this cooler effectively circulates air in large rooms, ensuring consistent and efficient cooling.
Durable Honeycomb Pads and Ice Chamber Boost Cooling: The high-density honeycomb pads and built-in ice chamber enhance the cooling efficiency, providing rapid and sustained temperature reduction for a comfortable environment.
Cons:
❌ No empty tank alarm (manual monitoring needed).
❌ Heavyweight design limits portability.
Comparison with Similar Desert Coolers
| Model | Crompton Optimus 65 | Symphony Sumo 75 | Bajaj DC 55 | Havells Celesta |
|---|---|---|---|---|
| Price | ₹18,999* | ₹21,499 | ₹15,990 | ₹19,500 |
| Tank Capacity | 65L | 75L | 55L | 60L |
| Air Delivery | 5500 CMH | 5000 CMH | 4500 CMH | 5200 CMH |
| Coverage Area | 650 sq. ft. | 700 sq. ft. | 500 sq. ft. | 600 sq. ft. |
| Power Consumption | 200W | 190W | 210W | 220W |
| Key Features | Auto-fill, Humidity Control | Larger tank, Wheels for mobility | Budget-friendly | Dual-speed motor |
*Price approximate (check Amazon link for latest offers).
Final Verdict
The Crompton Optimus 65 is a powerhouse for large spaces (up to 650 sq. ft.), offering a rare blend of high efficiency, humidity control, and inverter compatibility. While it lacks an empty tank alarm, its auto-fill, ice chamber, and 5500 CMH airflow make it ideal for extreme heat.
Buy if: You need robust cooling for spacious rooms and frequent power cuts.
Skip if: You’re budget-conscious or need ultra-portability.
For smaller areas, consider the Bajaj DC 55 (₹15,990). For larger spaces, the Symphony Sumo 75 (₹21,499) offers a bigger tank but at a higher price.
Ready to beat the heat? Check the Crompton Optimus 65 on Amazon today!
