INSTA -Συμβουλευτικές Υπηρεσίες - Main Component You are here: Home Projects HELONA RESORT DOUBLETREE BY HILTON RESORT KOS HELONA RESORT DOUBLETREE BY HILTON RESORT KOS HELONA RESORT DOUBLETREE BY HILTON RESORT KOS MEP DESIGN AND SUPERVISION of INSTALLATIONS for NEW 5 * hotel with 500 BEDROOMS IN THE KARDAMINA OF KO