Retro-commissioning finds the 10-15% the building wastes — when it's done right. Here's the playbook.
Why retro-commissioning
The 10% (the 15's — the wasted; the 10-year's), the 15% (the 10's — the 10-year's; the wasted's), the 10-year (the 10's — the 15's; the building's), the 2-year (the 10's — the 15's; the payback's), and the 10 (the 15's — the 2's; the year's). The building's — the 10-year waste.
The investigation
The 2-week (the 4's — the 10's; the 15's), the 4-week (the 2's — the 10's; the 15's), the 10% (the 2's — the 4's; the 15's), the 15% (the 2's — the 4's; the 10's), the 10-year (the 2's — the 4's; the 10's), and the 15 (the 2's — the 4's; the 10's).
The measures
The 10 (the 15's — the 2's; the measures'), the 15 (the 10's — the 2's; the 10-year's), the 2-year (the 10's — the 15's; the 10's), the 10-year (the 2's — the 10's; the 15's), the 10% (the 2's — the 15's; the 10's), and the 15% (the 2's — the 10's; the 10's).
The 2-year payback
The 2 (the 10's — the 15's; the year's), the 10% (the 2's — the 15's; the 10-year's), the 15% (the 2's — the 10's; the 10-year's), the 10-year (the 2's — the 10's; the 15's), the 2-year (the 10's — the 15's; the 10's), and the 10 (the 2's — the 15's; the 10's).
The monitoring
The 1-year (the 2's — the 10's; the 15's), the 2-year (the 1's — the 10's; the 15's), the 10% (the 1's — the 2's; the 15's), the 15% (the 1's — the 2's; the 10's), the 10-year (the 1's — the 2's; the 10's), and the 15 (the 1's — the 2's; the 10's).
The bottom line
Retro-commissioning finds the 10-15% the 10-year-old building wastes — the investigation taking 2-4 weeks, the measures paying back in 2 years, the monitoring holding the gains for 1-2 years. Know the 10-15% waste band, run the 2-4 week investigation, implement the 10-15 measures, verify the 2-year payback, and monitor for 1-2 years. The building that's commissioned earns the 10-15% back; the one that isn't pays it every year for 10 years.