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Bajaj Majesty RH 9F Plus (₹8,999) is the best for severe Delhi winters with its 2400W oil-filled radiator design, silent operation, and long heat retention. The 9 fins with PTC fan provide excellent coverage for 150-200 sq ft rooms. For budget-conscious buyers, Morphy Richards OFR 09 (₹7,199) offers similar performance at lower cost. Both handle 0-10°C temperatures effectively.

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Oil-Filled Radiators (OFR): Silent operation, heat retained for 30+ minutes after shutoff, ideal for bedrooms and all-night use, takes 10-15 minutes to warm up, more energy efficient for continuous use. Fan Heaters: Quick heating in 2-5 minutes, immediate heat stop when switched off, some noise from fan, better for intermittent use and small rooms. Choose OFR for comfort and silence, fan heaters for speed.

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Cost calculation: 2000W heater = 2 units/hour. At ₹6/unit, costs ₹12/hour. For 8 hours daily use: ₹96/day or ₹2,880/month. Energy saving tips: Use low settings (1000W) when possible (saves 50%), choose OFR heaters with thermostats (save 30% by cycling), heat only occupied rooms, maintain 20-22°C temperature (not higher). Close doors/windows to retain heat.

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Room size formula: Wattage ÷ 10 = room area in sq ft. 2000W heater suits 150-200 sq ft rooms (typical 12×15 ft bedroom). For 250-300 sq ft rooms (living rooms), need 2500W+ heaters. For 100-120 sq ft (small bedrooms), 1000-1500W sufficient. Delhi/NCR winters need 20-30% higher wattage due to lower temperatures. Ceiling height above 10 ft requires 20% more wattage.

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Yes, if safety features present: Oil-filled radiators (OFR) are safest for overnight use - no red-hot elements, cool-touch body, silent operation. Mandatory safety features: Tip-over switch (auto shutoff if knocked over), overheat protection (thermal cutout), ISI certification. Safety tips: Keep 3 feet away from curtains/bedding, never cover the heater, ensure proper ventilation, use thermostat to prevent overheating, place on flat surface away from traffic areas.

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Oil-filled radiators: Do NOT burn oxygen or reduce humidity - they only radiate heat like a hot water bottle. Completely safe for breathing and skin. Fan/convector heaters: Circulate air rapidly which can feel drying but don't actually remove moisture. Solutions: Keep a bowl of water near heater to add humidity, maintain 40-60% humidity levels, use humidifier if needed, avoid direct airflow from fan heaters. OFR heaters are best for sensitive individuals.

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YES - ISI certification is mandatory for safety. ISI (Indian Standards Institute) ensures: Proper insulation standards, accurate thermostat calibration, fire-resistant materials, genuine overheat protection, electrical safety compliance. Non-ISI heaters risk: Electric shocks, fire hazards, poor temperature control, insurance claim rejection in case of accidents. All our recommended models (Bajaj, Morphy Richards, Havells, Crompton, Orpat) are ISI certified. Never compromise on safety certification.

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Oil-filled radiators: 8-12 years with minimal maintenance - sealed oil never needs replacement. Fan heaters: 4-6 years - fan motors wear out, heating elements can fail. Extend heater life: Clean dust monthly (prevents overheating), store properly in summer (dry location), don't run on maximum setting continuously, use stabilizer if voltage fluctuates, follow manufacturer maintenance guidelines. Bajaj and Morphy Richards offer better longevity in Indian conditions.

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NO - This is dangerous and causes socket/plug melting. 2000W heater draws 9-10 amperes at 220V. Correct setup: Use dedicated 15A or 16A socket for 2000W+ heaters, check your circuit breaker rating (should be 15A minimum), use only the provided 15A plug (don't use adapters), ensure proper earthing for safety. Many user complaints about plug melting stem from using inadequate sockets. For 1000W heaters, regular 6A sockets work fine.