I got several quotes in the Seattle area this past summer. The cheapest was 18k, the most expensive was 34k. These were for 3-4 zone installs. I went with mrco

I got several quotes in the Seattle area this past summer. The cheapest was 18k, the most expensive was 34k. These were for 3-4 zone installs. I went with mrcooldiy and did it myself for about $7k.