Designed for the Hi-Velocity System, the HWC is a High Capacity Hydronic Heating water coil that comes installed in the H Series air handlers and can be field installed in the BU Series air handlers. To install, simply remove the front blower panels, and slide the coil into place on the supply air side of the blower. (Fig. HWC-01). The water coil is designed with 3/4 in copper connections with 6 internal rows of 3/8 copper tubing, for high heat transfer ratings even when using low water temperature sources. The coil is factory tested at 500 psi for leaks, and is designed to have a low water pressure drop through the coil reducing pump head loss.