- A range of high efficiency heat recovery units equipped with rotary heat exchangers, designed for installation in residential, commercial and industrial environments. Fully compliant with the requirements of the eco-design regulation N° 1253/2014/EU, in force since January 2018, the VORT NRG MEGA series appliances guarantee high standards of comfort and health by optimising the overall energy balance. The performances are certified by the European certification body EUROVENT.