A balanced heat recovery unit that includes two independent airflow channels, a supply channel through which, and by means of a fan (Turb1), outdoor air is sucked and driven towards the inside of the building, and an exhaust channel through which another fan (Turb2) sucks air from the inside of the building and expels it outdoors; both channels, the supply and exhaust channels having filters (Fil1, Fil2) at the inlet thereof and, on the inside of the heat recovery unit, they pass through the exchanger (Exch) in which, without mixing, the air that circulates in both directions exchanges the calorific value thereof; which further includes an electric connection through which the exchanger and the fans (Turb1, Turb2) are powered, as well as a controller (Ctrl) that is configured to control the heat recovery unit, it furthermore comprises: - differential pressure sensors (Sen1, Sen2) that is configured to determine the pressure drop in the exchanger (Exch) in the supply channel and in the exhaust channel, respectively, each one of which has two air inlet ports (PDif1, PDif2) and (PDif3, PDif4), oriented windward and situated respectively on both sides of the exchanger(Exch); - characterized in that the controller (Ctrl) is configured to control the speed at which the fans (Turb1) and (Turb2) function to maintain the flow regime in the respective supply and exhaust channels for air circulation, which, to do so, is configured to receive an electrical signal from each one of the differential pressure sensors (Sen1, Sen2) that is a function of the pressure drop that is produced over the exchanger (Exch) in each one of said supply and exhaust channels, respectively; and in that it furthermore comprises: - a memory that is configured to store a value matrix which corresponds to the airflow in each one of the channels, either supply or exhaust, based on the differential pressure produced in each one of the channels of the exchanger (Exch) and on the rotational speed of the corresponding fan (Turb1, Turb2) for the specific type of heat recovery unit; and - a programmable automat, or software implemented in the controller (Ctrl) which is configured to determine the airflow that passes through each channel as a function of the differential pressure reading in the corresponding sensor or, and based on these variables it is configured to automatically balance the installation, ensuring that the supply flow is equal to the exhaust flow at all times, or maintaining the desired pressure inside the building, in reference to the outside, varying the speed at which at least one of the fans (Turb1, Turb2) that drive the air in the channels of the heat exchange unit functions. - differential pressure sensors (Sen1, Sen2) that is configured to determine the pressure drop in the exchanger (Exch) in the supply channel and in the exhaust channel, respectively, each one of which has two air inlet ports (PDif1, PDif2) and (PDif3, PDif4), oriented windward and situated respectively on both sides of the exchanger(Exch); - characterized in that the controller (Ctrl) is configured to control the speed at which the fans (Turb1) and (Turb2) function to maintain the flow regime in the respective supply and exhaust channels for air circulation, which, to do so, is configured to receive an electrical signal from each one of the differential pressure sensors (Sen1, Sen2) that is a function of the pressure drop that is produced over the exchanger (Exch) in each one of said supply and exhaust channels, respectively; and in that it furthermore comprises: - a memory that is configured to store a value matrix which corresponds to the airflow in each one of the channels, either supply or exhaust, based on the differential pressure produced in each one of the channels of the exchanger (Exch) and on the rotational speed of the corresponding fan (Turb1, Turb2) for the specific type of heat recovery unit; and - a programmable automat, or software implemented in the controller (Ctrl) which is configured to determine the airflow that passes through each channel as a function of the differential pressure reading in the corresponding sensor or, and based on these variables it is configured to automatically balance the installation, ensuring that the supply flow is equal to the exhaust flow at all times, or maintaining the desired pressure inside the building, in reference to the outside, varying the speed at which at least one of the fans (Turb1, Turb2) that drive the air in the channels of the heat exchange unit functions.