Why 100% Copper Motors Outlast Aluminium in Hot Climates
Explore the thermal conductivity, duty-cycle resilience, and electrical efficiency of copper motor windings in extreme Indian temperatures.
When selecting an evaporative air cooler for demanding Indian climates, understanding room volume and airflow capacity (measured in Cubic Feet per Minute or CFM) makes all the difference between refreshing cooling and muggy humidity.
1. Calculating Room CFM
The fundamental rule for sizing an air cooler is:Required CFM = (Room Length × Room Width × Ceiling Height in Feet) ÷ 2
For a typical 20 ft × 15 ft living hall with 10 ft ceilings:(20 × 15 × 10) ÷ 2 = 3000 ÷ 2 = 1500 CFM minimum
Models like the Avimax Hulk 90L provide up to 4500 CFM air delivery, allowing ample capacity to circulate air even with open windows for cross-ventilation.
2. Why Water Tank Capacity Matters
During dry peak May and June months with ambient temperatures above 40°C, a desert cooler consumes between 6 to 10 litres of water per hour depending on fan speed and ambient humidity.
A 70L or 90L tank ensures uninterrupted cooling through 8 to 10 hours of overnight sleep without waking up to refill the water reservoir.
3. Pure Copper vs Aluminium Motors
Avimax exclusively utilizes 100% pure copper motor windings. Copper possesses nearly double the electrical conductivity of aluminium, drastically reducing resistance heat buildup and extending motor life over years of harsh summer duty cycles.
4. Essential Maintenance for Long Pad Life
To maintain peak cooling efficiency, empty the water tank weekly to eliminate dissolved mineral and salt deposits. Use clean tap water and inspect the submersible pump intake filter for debris. During off-season winter storage, run the fan on high speed for 30 minutes with the water pump switched off to completely dry the honeycomb cooling media before covering.
5. Cross-Ventilation Rules for Evaporative Cooling
Unlike refrigerated air conditioners that require sealed windows and doors, evaporative coolers require continuous cross-ventilation. Keep a window or door partially open on the opposite side of the room to allow humid air to escape and fresh dry air to be drawn through the water-saturated honeycomb pads.