I am a graduate student working on the design of a net-zero home. I am trying to couple solar thermal storage, a water-water heat pump with an air delivery system. Radiant heating is out of the question for this particular application. I am hoping to use a low speed air delivery system so I can reduce the temperature needed in the coil. I am wondering if anyone has any experience with something like this and can offer some insight as to what might work and what wont. Peak heating load is ~25000 Btu/h. Thanks.