Large facilities such as convention centers and auditoriums will require make-up air units. Air turnover or air exchanges are required to maintain a clean and safe space for everyone within the space. Make-up air units are used to introduce fresh replacement air to a space to “make-up” for the air that is exhausted from that space.
Additionally, makeup air is used to temper the air within these larger spaces. With options ranging from direct fired gas, indirect fired gas, electric, hot water or steam for heating to DX and chilled water for cooling. Whatever the environment there is a solution to temper it.
Make-up air units (MUA) in convention centers are often designed to introduce 100% outdoor air, 100% recirculated air and a combination of outside and recirculated air. This style of equipment is beneficial due to its flexibility.
Industry trade shows and odor generating events, such as car shows or restaurant equipment shows will require more air turnovers than a typical consumer or healthcare trade show. The ventilation rates and air exchanges required can be calculated for the specific event and programmed to operate from a building pressure sensor to coordinate the performance with the exhaust fans.
Recirculating Make up air units (Click to learn more about make-up air units) in auditoriums and theaters can provide significant cost savings due to the energy saved minimizing the amount of outdoor air being introduced. Occupied spaces will always require fresh air to be introduced to meet codes but at a significantly lower rate than other venues.
The air turnover rate to meet the ventilation code is less than the air turnover rate required to properly heat and/or cool the space. For this reason a makeup air unit with a recirculation feature can be provided to accommodate the demand. By introducing a small amount of fresh outside air while recirculating a larger portion of interior air you can temper a space for a fraction of 100% outdoor air systems.
Additionally, the recirculated air can be filtered and treated using UltraViolet (UV-c) Light or Cold Plasma Ionization to eliminate viruses (Click to learn more about UV-c lights) and airborne contaminants.