Hi, I'm looking for a creststar ceiling fan without lights for the living room. Mine house is a 4room std flat (92sqm). 1. May I know what size of ceiling fan suits best? 48inch or 54inch? 2. Which model is the best? 3. What is the difference between Swiftair Alumi acrylic series and Twinair Alumi acrylic series? And also the price for the both models. Thank you.