NEPTUNE TECH is a condenserless series of MTA designed for inside installation and environmentally friendly R410A refrigerant gas and these may be combined with remote condensers. ME / NEPTUNE TECH series, offered in a large number of models, versions, and layouts, respond optimally to the complex requirements of use within the context of air conditioning of large civil, private and public structures and within the commercial sector. The multi-scroll logics, adopted across the entire series, allow maximisation of the performance indices with partial loads which account for the largest portion of the working life of an air conditioning unit. Particular attention was paid to the dimensions of the space of these units that must be transported within technical rooms that are often difficult to access.