Zoning is a great concept that works well and saves money. Zoning with high-efficiency AC units in each room can save even more. There are many brands available and the cost of these have come down in recent years. Fujitsu, Mitsubishi, and others are making these more affordable and they can not only cool your space but heat your space. These units are transforming the HVAC industry. Companies like Above All Heating and Air Conditioning have been specializing in these installs for many years now and are extremely good at planning the install, space, and requirements. Pete Pharris is the owner of Above All Heating and Air Conditioning and he has been in the business for many years. If you are in California, he can help you with your HVAC needs. There are many companies that can install these units. Do a search on your favorite search engine for a local company. Get more than one bid as the prices do vary. Look at their reviews on the review sites. Have Fun and save money!