The impressive Casa Afytos Hotel is located in Afitos Halkidiki and has been operating since 2018. The company was entirely responsible for the construction and design of the property, which took less than a year. The property hosts mainly Western European tourists but also domestic tourists. The lodge has a 30 kW photovoltaic installation which covers 100% of its needs during the summer season, making its energy footprint zero.

Helioenergy has been intensively practicing the upgrading and restoration of neoclassical buildings in various areas of Thessaloniki, with the aim of highlighting protected single-family houses in the world. Some of these buildings are used as venues for photo shootings, receptions and also for rent.

The energy requirements of the hotel, due to its non-seasonal activity, are high and varied. Combined with the lack of organized support networks in the area, Helioenergy installed modern cooling, heating, and drainage systems. Polys has been equipped with a heat pump that provides domestic hot water, heating and cooling (during the summer season). The common areas of the accommodation are equipped with hydraulic underfloor heating and cooling, creating an extremely pleasant atmosphere in winter and summer. An extremely quiet and odourless biological rainwater system is responsible for the accommodation's drainage needs. A 20kW PV installation more than covers the energy needs of the accommodation, making its use completely environmentally friendly.