Household central air conditioning can be true or false?

1. There are part of the concept of sameness on the market similar products due to the form of indoor machine, part of the air conditioning brand went on a duct type products to pretend to be household central air-conditioning. Went on a wind machine, do not have household central air conditioning one outdoor connection more indoor machine, cold media on demand and output, saving energy effective characteristics. And with the increase of the number of indoor machine each one, will increase a outdoor, give families placed the balcony or outdoor wall adds unnecessary burden, many sets of the simultaneous operation of outdoor noise is bigger also. 2. If you want to buy household central air-conditioning advice to daikin decided that store to buy.