Use building automation systems (BAS) to control mechanical systems efficiently and maintain desired ventilation rates while minimizing unscheduled maintenance.
Avoid oversizing mechanical equipment. Oversized equipment will often increase operating costs and reduce operational efficiency. The correct equipment size will depend on a number of factors, including local climate, total building area, insulation levels, air filtration medium, number of windows and doors, and occupant comfort preferences.
Implement energy recovery systems, economizers, low-pressure-drop design, and efficient fans as appropriate to support ventilation rates meeting or exceeding the referenced ASHRAE standard without compromising energy performance.
Wait until receiving bids to decide whether or not to pursue EAc3: Enhanced Commissioning. If you request two different fees for the two scopes, you can easily assess the cost and benefits of Enhanced Commissioning.
The mechanical engineer continues running ventilation rate calculations during the mechanical design process to confirm compliance with this credit and to inform the design. The ventilation rate procedure is explained in section 6 of ASHRAE 62.1-2007.
An independent consultant, as compared to one from the same firm as the design team, is in the best position to truly represent the owner’s interests during design and construction, including installation of key systems.
Continuing to use an integrated design approach among the mechanical engineer, architects, owners and end users will facilitate design decisions that impact the mechanical design. For example, space planning decisions will impact the architectural programming of the space as well as access to natural ventilation.
