Qualifying improvements may include HVAC, chillers, lighting retrofits, insulation, windows/glazing, window coverings, energy management software, reflective roofing "cool roofs", car charging stations, water conservation improvements and renewable energy projects such as solar.

An MEP Engineer who is qualified to assess a building's mechanical, electrical and plumbing systems and/or the building envelope can come up with the best combination of improvements.

The PACE National Case Studies may be of interest.