AH is the heating and ventilation unit offered by Apen GroupAH is a new generation of gas fired air heating ventilation units. The unites are available with a wide range of heat outputs (up to 420 kW). AH units are fully condensing heaters with thermal efficiency of 108%. AH units are designed as a modular system, this allow to secure the heating and ventilation process. It is already equipped with premix burner, fan with inverter, innovative smart control and the possibility to customize the installation with many accessories.