T4H5, C4H5, H4H5, T4H7, C4H7, H4H7 Two Stage Mainline R410A 15 & 17 Seer HP Technical Support Manual T4H5, C4H5, H4H5, T4H7, C4H7, H4H7 Two Stage Mainline R410A 15 & 17 Seer HP Technical Support Manual