I would absolutely recommend Airplus of California INC who I hired to install a new system for me. Before installation started, they thoroughly explained how everything works. They took their time discussing everything with me. The installation people were also friendly and willing to answer questions. They worked quickly and efficiently. Everything worked when they were done. That was the true test. I thought this was the first time I used Airplus but they told me they may have installed the original equipment in my last house. That house was new construction so I didn't choose the installation company myself. I am very happy with the equipment from and installation by Airplus of California INC.