Using 9 fin OFR for 12x14 room. Serves it's purpose. Morphy Richard's. 2000W × 400W fan heater. Works well for Gurgaon. Run it for 30 minutes with fan, then turn it off and set the thermostat.
For Mussoorie have we have the 12 fin model. Works there too, where it gets quite cold.
Best aspect...