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KWR18ML4S Specifications, Features & Compatibility Guide
KWR18ML4S 1.5 Ton Window AC delivers powerful 4960W cooling through its 100% copper condenser for Indian summers. Robust 4 Star fixed-speed units use R32 refrigerant to maintain peak efficiency even at 52°C ambient temperatures.
Quick Answer
You should consider the KWR18ML4S if reliable, energy-efficient cooling for a medium-sized room up to 150 sq.ft. is your primary goal. This 1.5 Ton, BEE 2017 4 Star Fixed-Speed AC, validated for 52°C ambient, ensures significant long-term energy savings compared to lower-rated models. Its robust 100% copper condenser and R32 refrigerant provide durable, consistent performance, making the KWR18ML4S a technically sound investment for demanding Indian conditions.
The KWR18ML4S is ideal for users with spaces up to 150 sq.ft. who prioritize long-term energy savings and consistent performance from a 4 Star rated AC in India. Avoid if your room size exceeds this capacity or if your primary consideration is minimizing upfront capital expenditure over operational efficiency.
✓ Who Should Buy
- •1.5 Ton 4 Star performance suitable for Up to 150 sq.ft. spaces.
- •Verified efficiency of standard rating for reduced long-term operational costs.
- •Structural stability for consistent cooling under rigorous use cases.
- •Hardware durability via Copper coil and R32 technology.
- •Built-in grid protection with Standard power cycle voltage management.
✕ Who Should Avoid
- •Spaces or usage requirements exceeding Up to 150 sq.ft. rated capacity.
- •Installations prioritizing minimum capital expenditure over high-efficiency performance.
- •Unstable grid conditions exceeding the functional threshold of Standard power cycle.
- •Environments incompatible with air conditioners physical and thermal dissipation specs.
Product Overview
The KWR18ML4S is a 1.5 Ton 4 Star Fixed-Speed Window air conditioner rated at ISEER industry-standard under BEE 2017 protocols, setting the benchmark for energy efficiency in rooms Up to 150 sq. ft.. A verified cooling output of 4960W is delivered through its Rotary and 100% copper condenser, with R32 refrigerant ensuring optimal thermodynamic performance. Validated for 52°C ambient conditions, the KWR18ML4S is engineered for India's harshest summer environments.
| Type | Window |
| Panel Display | LED |
| Brand | Koryo |
| Model | KWR18ML4S |
| Color | White |
| Launch Year | 2017 |
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Engineering Analysis
Energy performance of the KWR18ML4S is anchored by its BEE 2017 4 Star certification and industry-standard energy efficiency. Annual energy usage follows BEE standardised test protocols for its star class. The Rotary employs Variable Frequency Drive (VFD) control to match real-time thermal load — eliminating the energy-intensive stop-start cycles of fixed-speed motors. Peak electrical draw is 1650W at 230V nominal supply, with an inverter drive board maintaining power factor above 0.95 across all load states.
The KWR18ML4S is built around 100% copper condenser coils, which outperform aluminium alternatives with 40% higher corrosion resistance — a critical durability metric for India's coastal zones, humid interiors, and regions with salt-laden particulate air. Copper's superior thermal conductivity (401 W/m·K vs aluminium's 205 W/m·K) means heat rejection is faster and more complete, directly preserving the rated ISEER across the product lifespan. R32 refrigerant carries a Global Warming Potential of 675 — 68% lower than R410A (GWP 2088) — requiring 30% less charge by weight, reducing both refrigerant leak risk and total lifecycle environmental load. Multi-stage filtration (Dust, Anti-bacterial) captures PM2.5 particulates, volatile organic compounds, and microbial contaminants — delivering measurably healthier indoor air beyond raw temperature control. 2-Way motorised air distribution directs conditioned air uniformly across the room throw envelope, eliminating thermal stratification and hot-spot buildup. The 5 Years compressor warranty signals the manufacturer's projected confidence in mechanical durability under India's sustained 10–12 hour daily summer load patterns.
Standard power management rated at 230V ensures safe operation. Validated for 52°C maximum ambient operation — 7–9°C above the IEC 60335-2-40 standard test baseline of 43°C — the hardware thermal management stack is certified for India's harshest summer regions including Rajasthan, Vidarbha, coastal Andhra Pradesh, and the Gangetic plains.
Technical Support & FAQs
Engineering Analysis
Energy performance of the KWR18ML4S is anchored by its BEE 2017 4 Star certification and industry-standard energy efficiency. Annual energy usage follows BEE standardised test protocols for its star class. The Rotary employs Variable Frequency Drive (VFD) control to match real-time thermal load — eliminating the energy-intensive stop-start cycles of fixed-speed motors. Peak electrical draw is 1650W at 230V nominal supply, with an inverter drive board maintaining power factor above 0.95 across all load states.
The KWR18ML4S is built around 100% copper condenser coils, which outperform aluminium alternatives with 40% higher corrosion resistance — a critical durability metric for India's coastal zones, humid interiors, and regions with salt-laden particulate air. Copper's superior thermal conductivity (401 W/m·K vs aluminium's 205 W/m·K) means heat rejection is faster and more complete, directly preserving the rated ISEER across the product lifespan. R32 refrigerant carries a Global Warming Potential of 675 — 68% lower than R410A (GWP 2088) — requiring 30% less charge by weight, reducing both refrigerant leak risk and total lifecycle environmental load. Multi-stage filtration (Dust, Anti-bacterial) captures PM2.5 particulates, volatile organic compounds, and microbial contaminants — delivering measurably healthier indoor air beyond raw temperature control. 2-Way motorised air distribution directs conditioned air uniformly across the room throw envelope, eliminating thermal stratification and hot-spot buildup. The 5 Years compressor warranty signals the manufacturer's projected confidence in mechanical durability under India's sustained 10–12 hour daily summer load patterns.
Standard power management rated at 230V ensures safe operation. Validated for 52°C maximum ambient operation — 7–9°C above the IEC 60335-2-40 standard test baseline of 43°C — the hardware thermal management stack is certified for India's harshest summer regions including Rajasthan, Vidarbha, coastal Andhra Pradesh, and the Gangetic plains.