DIY ducted AC

[qwertyu]

I would like to install ducted AC (minus the electrical and gas where I will cal the professionals in). Has anyone does this before? Is there any good websites/resources online where I can pick all the parts I need to buy?

[droog]

Have not done reverse cycle but designed and installed the gas ducted heating and evaporative cooling at our last 3 homes.

I dont have a specific resource to point you to but you will find quite a bit of the principals and guides up on the net for the design.
As for purchasing the parts the most recent I got all the parts from Metalflex https://www.metalflex.com.au/ was super happy with the service, they even set me up with an account so I got discount.