Commercial Ventilation

Domestic Heat recovery units are not fit for purpose in large scale commercial buildings such as schools, hospitals, office blocks etc. These types of buildings require large amounts of supply air that larger units are specifically designed to help provide.

At Grocon Energies we have installed, commissioned, and maintained both Toshiba and Fujitsu Air-to-Air heat exchangers, overseeing their operation in large scale commercial buildings with different functions and requirements.

Depending on the function of the building, very high air change rates may be needed, be it to supply a required amount of fresh air throughout regularly crowded rooms or to remove pollutants in the air due to manufacturing or chemical processes occurring in the room. These units can supply up to 2000m3/hr to a building or section of a building.

Commercial air to air heat recovery units work in the same principle as the domestic heat recovery units. The main difference being the size of the unit and ducting. Dual flow ventilation occurs, simultaneously extracting warm waste air from kitchen, wet rooms, workshops, labs, chemical rooms etc while supplying the remaining rooms with warm, fresh air as required.

The warm extract air is passed through a cross flow or counter-flow heat exchanger with the outdoor intake air supply effectively reducing the energy demand on the heating system of the building.

Fujitsu Energy Recovery Ventilator

The Fujitsu Energy Recovery Ventilator dramatically reduces energy consumption by using a counterflow heat-exchange element. Air conditioning load is reduced by approximately 20%, resulting in significant energy savings.

Recovers up to 77% of the heat in the outgoing air.

With the crossflow element, air moves in a straight line across the element. With the counter-flow element, air flows through the element for a longer time (longer distance), so the heat-exchange effect remains unchanged.