The Omega Vertical Stack Hybrid Heat Pump unit with Low GWP R-454B refrigerant utilizes the same efficient and reliable design as our classic Vertical Stack Heat Pump. Omega Hybrid Heat Pump system combines two reliable technologies into one package for optimized cooling and heating performance - Fan coil hydronic heating during winter and DX cooling during summer. The Vertical Stack Hybrid Heating & Cooling Unit with Integrated ERV (VSHYe) system is the market leader in integrated ERV hybrid systems. Duct connections are made at the top of the unit and ERV core, controls and chassis are all accessible from the front return air panel. Single point source power for entire unit and factory configured ERV for hassle free installation and start-up.