I am looking for a central air conditioning unit for a three-bedroom house. The unit should be made of durable, weather-resistant materials for the outdoor unit and high-quality materials for the indoor unit. It should be suitable for a house approximately 1, 200 to 1, 800 square feet in size and have a standard weight for residential units. The packaging should be secure to prevent damage during shipping. The unit must meet Level 5 energy efficiency standards, be Energy Star certified, and have high SEER (16 or above) and EER ratings. It should have a BTU rating of approximately 24, 000 BTU (2 tons) to 36, 000 BTU (3 tons), depending on specific needs and local climate. Additionally, it should offer dual functionality for cooling and heating, feature inverter technology, a variable speed compressor, quiet operation, and be Wi-Fi enabled for smart home integration. Please provide information on delivery time, payment options, and shipping costs and options.