Energy Audit Guide
Step-by-step guidance on ASHRAE audit levels, Energy Conservation Measures, and implementation strategy.
ASHRAE Audit Levels
A brief survey of the facility to identify low-cost/no-cost improvements and potential capital improvements. Reviews utility bills and conducts a walkthrough.
- Utility bill analysis
- List of low-cost ECMs
- Rough order-of-magnitude savings estimates
A detailed energy analysis of all building systems. Provides detailed savings and cost analysis for all identified ECMs. Required by most utility rebate programs.
- Detailed ECM analysis with costs & savings
- Payback period calculations
- Utility rebate pre-qualification
- Implementation priority ranking
A comprehensive engineering analysis with detailed project costs and savings projections suitable for capital investment decisions and financing applications.
- Investment-grade financial analysis
- Detailed engineering specifications
- Contractor bid documents
- Financing package support
Energy Conservation Measures (ECMs)
Replace metal halide/fluorescent fixtures with high-efficiency LED + occupancy sensors.
Replace aging units with ENERGY STAR® certified equipment and smart controls.
Convert constant-volume HVAC to VAV systems for demand-based airflow control.
Air sealing, dock door seals, roof/wall insulation upgrades to reduce thermal loss.
Reflective roofing membrane reduces solar heat gain and cooling load in warm climates.
Warehouse rooftop solar generation to offset electricity consumption and peak demand charges.
Centralized automation for HVAC scheduling, lighting controls, and energy monitoring.
Priority Sites for Immediate Action
| Site | State | Cost Index | Recommended Action |
|---|---|---|---|
| LAX | CA | 1.76× | Immediate Level 2 audit. SCE/LADWP rebates available. High solar potential. |
| SJC | CA | 1.82× | Immediate Level 2 audit. PG&E 0% financing up to $6M. SGIP storage incentive. |
| SAN | CA | 1.85× | Highest priority. SDG&E has highest rates in the US. Level 2 audit + solar PV. |
| US-HQ | CA | 1.76× | Level 2 audit. Leverage PG&E Strategic Energy Management Program. |
| BOS | MA | 1.47× | Level 2 audit. Mass Save® no-cost assessment available. High gas rates. |
| EWR | NJ | 1.25× | Level 2 audit. PSE&G on-bill financing available. NJCEP up to 70% of project cost. |