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Retro-Cx is one of the best investments in the Building Industry TODAY with paybacks of less than 1 year. WHY then isn't everyone doing it? This presentation explores WHY, HOW and WHAT we need to do to fix take advantage of this OPPORTUNITY.
Is like Mining for Gold
Murray Guy, Integrated Designs
$5000 Retro Investment avoids a $1.8M
Air Quality Improvement Project
Retro-Cx hits the Mother Load
6 Ounces Sierra County, California
Can Retro-C Save the Planet?
“What is that all about?”
1/3 of Canada’s Energy Use
50% of extracted materials
25% of our landfill waste
10% of our airborne particulates
40% of our greenhouse gases
Reference: A Business Case for Green Buildings in Canada
If the entire stock of existing non-residential
buildings in the U.S. were retro-commissioned,
as much as $30 billion of energy savings and
340 million tons of CO2 could be avoided
annually. (LBL Study)
What if we TUNED all non-Residential Buildings?
Energy Saving (Less than 2 Yr Payback)
Environmental Quality (Productivity $500 psf)
Less Stress (# of Fires to Put Out)
Building Renewal Opportunities (POS)
Capital Cost Avoidance (Young Offenders)
Water Saving (Getting to be a Bigger Issue)
Lots of Different Nuggets
Retro-Commissioning must be TOP SECRET
Where else can you do you get a low risk >50% return on Investment?
WHY isn’t everyone doing it?
• Business Case
• No Commitment
• No Time
What are the Barriers?
Great strides have been made in advancing the knowledge and awareness about commissioning by
such groups, as ASHRAE and the Building Commissioning Association, however there are still many
barriers to overcome before the commissioning industry gets recognition for being a
The REALITY is that “Commissioning is arguably the Single-Most-Cost Effective strategy for
reducing energy costs and green house case emissions in buildings today”
We just Made the Business Case
Its up to Stakeholders to make “the Claim”
How to Mine the Claim Stage 1
• Benchmark the Facility (MJ/M2)
• Compare to other Facilities
• Cowboy Math Analysis (Go no Go)
• What is the current Energy Usage?
• How does it compare to industry
• Cowboy Math
• Savings (10% of $5.00 psf) = $.50
• Cost $0.50 psf
• Payback 1 Year
• Make the Pitch
Determine how big of a Gold Deposit
Try the IDI Energy Use Assessment Tool
• Assemble a Team
• Define Project Requirements
• Plan, Budget and Funding
• Implement, Verify and Repeat
How to Mine the Claim Stage 2
Who should be on “the Team”
3.Tenant or Occupant Rep
depending on measures to be
taken (Controls trades,
balancers, M&E Engineers, etc.)
Define the Project Requirements
• What are issues?
• What are the opportunities?
• Where is the VALUE?
• What are the priorities?
• Critical problems
• Occupant complaints
• Seasonal problems
• Peak loads problems
• Environmental quality problems
• Energy Costs above expectation or
growing over time
• Frequent equipment failures
Collect the Easy Nuggets
• Deferred Maintenance (leaks,
• Known broken “stuff”
• Bad Habits (open windows in
winter, space heaters for over-
• Control Setpoint & Sequences
• Are sequences known and documente
• Are systems being overridden to resolv
• Schedules & Set points
• Demand control ventilation
• Daylighting Control
• Additional Metering
No More Half Dead Zombie Controls
Tune the Building then Dig Deeper
• Full Building Energy Audit?
• Systems Upgrade?
• Space Utilization?
• Building Renewal?
Getting Retro-Cx Done
• Understanding Owner Requirements
• Studies and audits are OK, but action
needs to be taken and changes need
to be sustained
Re-Commissioning process helped reduce energy
use from 900 MJ/m2 to 600 MJ/m2 (30% Reduction)
Retro or Re-commissioning can reduce
GHG in buildings by 15% to 40%
Innovation Place Energy Use
2002 2003 2004
Energy Use (MJ/m2)
Energy Use Targets
Annual Energy Saving: $500,000/yr Savings to Date: $5,000,000