Cx Process for Existing Buildings

Question 1

What does EBCx stand for?

Answer 1

EBCx stands for Existing Building Commissioning.

EBCx focuses on optimizing existing buildings for better performance.

Question 2

What is the main goal of EBCx?

Answer 2

To improve the performance of existing buildings to meet current operational needs.

Question 3

Name three benefits of EBCx.

Answer 3

• Improved system operation
• Energy savings
• Improved indoor air quality

Question 4

When is EBCx appropriate?

Answer 4

When a building has not been commissioned, has changed operations, or is underperforming.

Question 5

What are the main phases of EBCx?

Answer 5

• Planning and assessment
• Investigation
• Implementation
• Hand-off

Question 6

What is CFR in EBCx?

Answer 6

Current Facility Requirements.

Question 7

Who is typically on the EBCx team?

Answer 7

• Cx lead
• Building owner
• Manager
• Staff
• Stakeholders

Question 8

What is a common reason for EBCx?

Answer 8

High utility bills or poor indoor air quality.

Question 9

Name one key deliverable of the planning phase.

Answer 9

Initial EBCx plan.

Question 10

What is the purpose of the investigation phase?

Answer 10

To identify deficiencies and operational improvements.

Question 11

What is a Diagnostic Monitoring Plan?

Answer 11

A plan to trend data for evaluating system performance.

Question 12

What tool is used for trending building performance?

Answer 12

Building Automation System (BAS) or data loggers.

Question 13

What is a Functional Performance Test (FPT)?

Answer 13

A test to verify that systems perform as intended.

Question 14

What is the Master List of Findings?

Answer 14

A summary of all issues found during investigation.

Question 15

What is the goal of implementation?

Answer 15

To carry out selected improvements and verify their effectiveness.

Question 16

What is the Systems Manual?

Answer 16

Documentation describing the building systems and how they are to be operated.

Question 17

What happens in the hand-off phase?

Answer 17

Final report, training, and persistence strategies are provided.

Question 18

What does OCx stand for?

Answer 18

On-Going Commissioning.

Question 19

Why is persistence important in EBCx?

Answer 19

To ensure long-term benefits of implemented improvements.

Question 20

What role does training play in EBCx?

Answer 20

Ensures building staff can maintain new systems effectively.

Question 21

What is a common EBCx cost per square foot?

Answer 21

$0.30 per square foot.

Question 22

What is the average payback for EBCx projects?

Answer 22

Approximately 1.1 years.

Question 23

Name one common energy-saving ECM.

Answer 23

Optimizing equipment runtime.

Question 24

What is a VFD?

Answer 24

Variable Frequency Drive.

Question 25

How does BAS contribute to EBCx?

Answer 25

Provides control and monitoring data for system optimization.

Question 26

What does the ASHRAE Guideline 0.2 describe?

Answer 26

The EBCx process for existing systems and assemblies.

Question 27

What is an example of simple repair in EBCx?

Answer 27

Calibrating a mixed-air temperature sensor.

Question 28

What is a key challenge in EBCx?

Answer 28

Lack of existing documentation.

Question 29

What is a critical element in selecting a Cx provider?

Answer 29

Relevant experience and problem-solving skills.

Question 30

Why involve building operators in EBCx?

Answer 30

They provide insights and can help ensure lasting changes.

Question 31

What does EUI stand for?

Answer 31

Energy Use Intensity.

Question 32

What is a benefit of in-house implementation?

Answer 32

Lower cost and immediate execution.

Question 33

What is a simple way to reduce energy use?

Answer 33

Implement night setbacks.

Question 34

Why are control strategies often defeated?

Answer 34

Lack of understanding or improper application.

Question 35

What is the role of economizers in HVAC?

Answer 35

To use outdoor air for cooling when conditions allow.

Question 36

What does a chiller lockout do?

Answer 36

Prevents operation under low-load conditions.

Question 37

What is demand-controlled ventilation?

Answer 37

Adjusting ventilation based on occupancy.

Question 38

Why use reset strategies in HVAC?

Answer 38

To match system output to actual demand.

Question 39

What should a final report include?

Answer 39

* Project summary * Savings * Future recommendations

Question 40

What is a key aspect of good BAS programming?

Answer 40

Ease of use and override prevention.

Question 41

What is the purpose of a kick-off meeting?

Answer 41

To align team members and clarify project objectives.

Question 42

Why is documentation important in EBCx?

Answer 42

Supports maintenance and ensures performance persistence.

Question 43

What is the role of prefunctional testing?

Answer 43

To ensure systems are ready for functional testing.

Question 44

Why compare baseline and post-implementation data?

Answer 44

To measure the effectiveness of improvements.

Question 45

What does a low static pressure indicate?

Answer 45

Low system demand, allowing fan speed reduction.

Question 46

What is a control sequence?

Answer 46

A defined order of operations for system components.

Question 47

What is a common implementation method?

Answer 47

Owner-led implementation.

Question 48

What is the benefit of involving stakeholders?

Answer 48

Ensures the project meets real operational needs.

Question 49

What metric is used to rank project priorities?

Answer 49

Payback period and energy savings potential.