Colorado Regulation 28 performance deadline: December 31, 2026 for buildings 100,000+ sq ft. Start your audit →

How We Work

The Audit Process, Step by Step

We've built a repeatable, efficient process specifically for Colorado's Regulation 28 requirements. No billable hours, no scope creep -- you know what you're getting before we start.

Phase 1 1-2 business days

Initial Consultation and Scope

  • Review your building's ENERGY STAR Portfolio Manager account and existing benchmarking data
  • Confirm your Regulation 28 compliance tier (100k+ sq ft vs. 50k-99k sq ft)
  • Identify your current EUI and GHG baseline against 2021 data
  • Determine the most viable compliance pathway before audit work begins
  • Issue a flat-fee proposal with a fixed delivery timeline
Phase 2 3-5 business days

Data Collection and Utility Review

  • Collect 24 months of utility data (electric, natural gas, district energy, other fuels)
  • Review utility account structure -- multi-meter buildings often have data gaps
  • Identify 2021 baseline year data for pathway compliance calculations
  • Flag any tenant sub-metering gaps that affect whole-building reporting
  • Request building drawings, mechanical schedules, and equipment inventories
Phase 3 1-2 days on-site

On-Site ASHRAE Assessment

  • Walk HVAC systems: chillers, boilers, RTUs, VAV boxes, controls
  • Document lighting systems, controls, and occupancy sensors
  • Assess building envelope: insulation, glazing, infiltration
  • Review domestic hot water, elevators, plug loads
  • Interview facilities staff on operational schedules and known issues
Phase 4 5-7 business days

Energy Model and Pathway Analysis

  • Model building energy performance using collected field data
  • Calculate current EUI and GHG intensity against CDPHE targets
  • Analyze all four compliance pathways and determine feasibility of each
  • Develop Energy Conservation Measure (ECM) list with estimated savings
  • Identify potential Xcel Energy, Black Hills Energy, or C-PACE incentives applicable to your property
Phase 5 3-5 business days

Audit Report and Compliance Documentation

  • Deliver comprehensive ASHRAE Standard 211-compliant audit report
  • Include ECM analysis with costs, payback periods, and emissions impact
  • Prepare Regulation 28 compliance pathway declaration documentation
  • Provide CDPHE reporting package ready for submission
  • Schedule a review call to walk through findings and answer questions

What You Receive at the End

Full Audit Report

ASHRAE Standard 211-compliant documentation covering your building systems, current energy performance, and identified Energy Conservation Measures with cost and savings estimates.

CDPHE Compliance Package

A ready-to-submit compliance declaration with your selected Regulation 28 pathway, supporting calculations, and the documentation CDPHE requires for your performance period report.

Incentive Opportunities Report

An itemized summary of applicable Xcel Energy, Black Hills Energy, and Colorado C-PACE financing opportunities tied to the ECMs we identified for your building.

Ready to start?

Tell us your building size and location. We'll send a flat-fee proposal within one business day.

Request a Proposal