Commercial Mechanical Equipment Checklist

Note that alterations to existing mechanical systems shall meet WSEC C503.4 requirements. Mechanical units need to be “right-sized” based on load calculations and cannot reduce the existing economizer capacity.

Plans

1. Site Plan or Roof Plan
   • Drawn to scale
   • Aerial views such as GIS or Google maps are acceptable
   • Show equipment location relative to building and other equipment

Documents

1. Signed and Dated Application Form
   • For installation or replacement of HVAC equipment only, use Mechanical Permit Commercial (MPE) Application Form (PDF)
   • When project includes structural framing or significant ductwork modifications, wall/roof penetrations, commercial kitchen hoods or mechanical work related to another project, use the Commercial, Multi-Family & Industrial (CMI) Application Form (PDF)
2. Supplemental Form – Commercial Mechanical Equipment (PDF)
3. Equipment Specifications
4. Structural Calculations, required when:
   • New equipment weighs more than 400 pounds or
   • Replacement equipment weighs more than existing equipment or
   • Replacement equipment is in new location

Resources

File Naming Standards Plan File Requirements – Leave a blank area on the plans for the Approval Stamp Design Codes and Criteria WSEC C503.4 Energy Code Requirements (WAC 51-11C-50300 Section 503)