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I'm looking for a unit that features a sleek all-black interior and elegant wooden flooring throughout. The layout should include three bedrooms, a spacious living room, and a well-equipped kitchen. It's essential that the unit is designed with modern amenities, including both air conditioning and heating for year-round comfort. Please provide details regarding your available options that match these specifications. Additionally, I would appreciate it if you could share information about the materials and design elements used in the construction. I'm particularly interested in how the all-black aesthetics work with the wooden floors to create a warm yet contemporary feel. Any insights on energy efficiency or maintenance would also be helpful. Looking forward to your response with suitable products.