A hot water coil is an important part of a central heating system that enables the combination of heating and cooling systems to save space and occasionally installation and energy costs. Adding a hot water coil between an air handler and a heat source can increase the capacity of an existing system, and is most suitable where the heating load is limited. TriStateCoil.com can help you find an affordable hot water coil for your home air conditioning and heating unit. With just a little knowledge from us and the right tools for the job, a homeowner could easily install it, enabling the owner to save money on installation fees for their new hot water coil.