When replacing a 480,000 btu/hr RTU cooling unit in Mecklenburg County, must an outdoor air economizer be included in the bid?

The inclusion of an outdoor air economizer in the bid for replacing a 480,000 BTU/hr rooftop unit (RTU) cooling unit in Mecklenburg County is mandated. This requirement is typically based on local building codes and energy efficiency regulations that promote the use of economizers as a way to leverage outside air for cooling. By utilizing outside air when conditions allow, economizers can significantly improve energy efficiency and reduce operational costs, which is often a regulatory focus in regions aiming to enhance sustainability.

In many jurisdictions, including Mecklenburg County, the code may require economizers be installed for certain sizes of cooling units, especially those that exceed specific capacity thresholds, thus ensuring that energy efficiency is prioritized in commercial and large residential buildings. This fosters a reduction in mechanical cooling load, enhancing the overall performance and efficiency of HVAC systems.

Other considerations that may not apply include the context of building use or client specifications, as the code typically takes precedence in requiring such systems for units of this capacity.