If using air flow modeling (Option 2), select a natural ventilation modeler and for the project and consult with them.
If using air flow modeling (Option 2), select a natural ventilation modeler and for the project and consult with them.
If using air flow modeling (Option 2), select a natural ventilation modeler and for the project and consult with them.
For best value the CxA hiring process should start during design development when mechanical systems are identified and the CxA should hired by the end of design development. Put together the Cx RFP and select the CxA. This is more critical if the project is pursuing the Enhanced Commissioning credit. The process may include soliciting proposals from independent parties. See the Documentation Toolkit for help in writing the Cx RFP and hiring the right CxA
Determine the ratio of floor area to operable wall or roof openings for naturally ventilated spaces to see what floor areas can be ventilated by operable windows.
Case 2 – Natural Ventilation
If you choose to pursue IEQc5: Indoor Chemical and Pollutant Source Control, relatively high MERV 13 filtration is required. Pursuing both credits may require you to increase duct size and fan power, and may even affect your system selection.
Commercial Interior projects cost in the range of $0.30/ft2 as compared to an average of $1/ft2 for New Construction.
Create separate zones in buildings with mixed-mode ventilation systems—one for natural ventilation and one for mechanical ventilation—and follow the appropriate compliance path for each area.
The cost of commissioning Core and Shell spaces is typically less than New Construction because the installed systems would be limited to base building and may not include detailed fit out with controls, demand controls, pumps or VFDs.
Case 1 – Mechanical Ventilation
If properly implemented, commissioning will pay for itself within a year of operation, or even during design. Savings are likely to be realized from:
Reduction or elimination of change orders
Reduction or elimination of requests for information
Proper system and component selection
Improved performance.