... :It is suitable for family,villa,apartment,high-floor residence,business restaurant,hotel and multi-floor living building in country and village ... places where need much hot water and heating.Such as hotel,factory,school,hospital,military,villa,village etc.Commercial Series Air ... need much hot water and heating.Such as school,factory,hotel,hospital,military,villa,village etc. MODELYYJ-AS-3.5YYJ-AS ...