美国采购需求：空气交换器、空气交换通风机、空气处理机组、空气对空气交换器、空气对空气热交换器、空气通风

I'm reaching out to inquire about the availability of ducted mini split systems in the U.S. market. I'm particularly interested in understanding the different models you offer, as well as any specifications and features that set them apart. Additionally, could you provide insights on pricing, lead times, and any support resources you offer for installation and maintenance? This info is crucial for our decision-making process, as we're looking to establish a reliable sourcing option. Thanks for your assistance!