Can I install one indoor unit now and add another unit later?

Yes, but there are some limitations. Multis require at least two connected indoor units of specific size in order to function. So, within allowable size ranges, you can start with two indoor units and add more later to the same outdoor unit. If you want to start with just 1 indoor unit, you will need to install a single system, and add a new outdoor unit for any future additions.

 

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