I in the process of specifying a Unico HV system for a large, residential home. I am in the process of try to evaluate if using a two speed system will be worth the extra cost / reduced reliability. If anyone knows offhand of any online articles or past print articles (like from ASHRAE) where two speed units were evaluated, please let me know.
The home in question has a high amount of fenestration (the owner loved those huge bay window with a southwest face). Therefore on humid days with heavy cloud cover, the home might not reach anywhere its normal peak summer time load. A lower speed maybe useful for dehumidification purposes or it may just be overkill.
thanks in advance..