We have a project here that is a potential for those City Multi-split systems. We looked at both Daikin and Mitsubishi options (24 tons). I know these systems have been around for 20-30 years in other countries, but since they only been in the US for like the last 5 years we haven't gotten much usage information on them. So I thought I would ask for your guy's opinions on the matter.
1. Are they reliable?
2. Is there really an energy savings (big enough to outset the upfront cost)? ROI?
Summary of building... two story, 12 zones (design requirement), with existing (2) 25 ton heat pump package units on the roof. Other options include WSHP and VAV system with reheat.