intelligent/adaptive coil material application

[nina]

regenerative latent heat pump (http://www.acvio.com/eng.html), up to 40 seer

[nubbin]

If you are skilled HVAC tech, maybe. If you will rely on a company with no local service rep or techs, you could be without heat or cool for a long time.

[RoBoTeq]

I already have that kind of heat source. Every night my three cats lay around us in bed.