View the LEED v4.1 version of this credit »
SPECIAL REPORT
LEEDuser expert
Paul Swierc
CEM, CPMP, BECxP, CxA+BE, EIT, LEED GA
WSP
Senior Commissioning Agent
SPECIAL REPORT
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Frank advice from LEED experts
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Credit language
© Copyright U.S. Green Building Council, Inc. All rights reserved.
Intent
To reduce ozone depletion and support early compliance with the Montreal Protocol while minimizing direct contributions to climate change.
Requirements
Option 1. No refrigerants or low-impact refrigerants (1 point)
Do not use refrigerants, or use only refrigerants (naturally occurring or synthetic) that have an ozone depletion potential (ODP) of zero and a global warming potential (GWP) of less than 50.
OR
Option 2. Calculation of refrigerant impact (1 point)
Select refrigerants that are used in heating, ventilating, air-conditioning, and refrigeration (HVAC&R) equipment to minimize or eliminate the emission of compounds that contribute to ozone depletion and climate change. The combination of all new and existing base building and tenant HVAC&R equipment that serve the project must comply with the following formula:
IP units
|
SI units
|
Calculation definitions for |
Calculation definitions for |
|---|---|
LCODP = [ODPr x (Lr x Life +Mr) x Rc]/Life |
LCODP = [ODPr x (Lr x Life +Mr) x Rc]/Life |
LCGWP = [GWPr x (Lr x Life +Mr) x Rc]/Life |
LCGWP = [GWPr x (Lr x Life +Mr) x Rc]/Life |
LCODP: Lifecycle Ozone Depletion Potential |
LCODP: Lifecycle Ozone Depletion Potential |
LCGWP: Lifecycle Direct Global Warming Potential |
LCGWP: Lifecycle Direct Global Warming Potential |
GWPr: Global Warming Potential of Refrigerant |
GWPr: Global Warming Potential of Refrigerant |
ODPr: Ozone Depletion Potential of Refrigerant |
ODPr: Ozone Depletion Potential of Refrigerant |
Lr: Refrigerant Leakage Rate |
Lr: Refrigerant Leakage Rate |
Mr: End-of-life Refrigerant Loss |
Mr: End-of-life Refrigerant Loss |
Rc: Refrigerant Charge |
Rc: Refrigerant Charge |
Life: Equipment Life |
Life: Equipment Life |
For multiple types of equipment, calculate a weighted average of all base building HVAC&R equipment, using the following formula:
IP units |
|
SI units |
|
|---|---|---|---|
∑ ( LCGWP + LCODP x 105 ) x Qunit |
≤ 100 |
∑ ( LCGWP + LCODP x 105 ) x Qunit |
≤ 13 |
Qtotal |
Qtotal |
||
Calculation definitions for |
Calculation definitions for |
|---|---|
| (IP units) | (SI units) |
Qunit = Gross AHRI rated cooling capacity of an individual HVAC or refrigeration unit (Tons) |
Qunit = Eurovent Certified cooling capacity of an individual HVAC or refrigeration unit (kW) |
Qtotal = Total gross AHRI rated cooling capacity of all HVAC or refrigeration |
Qtotal = Total Eurovent Certified cooling capacity of all HVAC or refrigeration (kW) |
What does it cost?
Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »Frequently asked questions
|
How can I determine the leakage rate of my equipment? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
Should all commercial refrigerant equipment be accounted for, including both upright and under-counter? What about walk-in refrigerators? Ice makers? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
I'm working on a renovation project and we'll be keeping some of the existing equipment. Should we include these systems in our calculations? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
What is the required timeline for completing a CFC phase-out for this credit? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
The refrigerant type I need to enter is missing from the credit form. What should I do? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
Are HCFC or HFC refrigerants considered CFC-based refrigerants? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
Addenda
What capacity is to be used for centrifugal chillers that, due to their selection conditions, cannot operate at AHRI standard conditions?
The AHRI flow rates are based on capacity. This leads to circular calculation since AHRI standard conditions are dependent on capacity, but capacity is the desired output. How does the project team resolve this circular calculation?
To determine the Gross AHRI rated cooling capacity (tons) of an individual HVAC or refrigeration unit that cannot operate at AHRI standard conditions, use the design and selected conditions of the equipment drawing or schedule. Enter this cooling capacity in the Qunit (tons) column in Table. Mechanical and Cooling and Refrigeration Equipment in the credit form.
To determine unit capacity in tons for centrifugal chillers that cannot operate at AHRI standard conditions, use selected flow rates for the evaporator, and use standard AHRI temperatures established for the individual HVAC or refrigeration unit.
Documentation toolkit
The motherlode of cheat sheets
LEEDuser’s Documentation Toolkit is loaded with calculators to help assess credit compliance, tracking spreadsheets for materials, sample templates to help guide your narratives and LEED Online submissions, and examples of actual submissions from certified LEED projects for you to check your work against. To get your plaque, start with the right toolkit.
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© Copyright U.S. Green Building Council, Inc. All rights reserved.
Intent
To reduce ozone depletion and support early compliance with the Montreal Protocol while minimizing direct contributions to climate change.
Requirements
Option 1. No refrigerants or low-impact refrigerants (1 point)
Do not use refrigerants, or use only refrigerants (naturally occurring or synthetic) that have an ozone depletion potential (ODP) of zero and a global warming potential (GWP) of less than 50.
OR
Option 2. Calculation of refrigerant impact (1 point)
Select refrigerants that are used in heating, ventilating, air-conditioning, and refrigeration (HVAC&R) equipment to minimize or eliminate the emission of compounds that contribute to ozone depletion and climate change. The combination of all new and existing base building and tenant HVAC&R equipment that serve the project must comply with the following formula:
IP units
|
SI units
|
Calculation definitions for |
Calculation definitions for |
|---|---|
LCODP = [ODPr x (Lr x Life +Mr) x Rc]/Life |
LCODP = [ODPr x (Lr x Life +Mr) x Rc]/Life |
LCGWP = [GWPr x (Lr x Life +Mr) x Rc]/Life |
LCGWP = [GWPr x (Lr x Life +Mr) x Rc]/Life |
LCODP: Lifecycle Ozone Depletion Potential |
LCODP: Lifecycle Ozone Depletion Potential |
LCGWP: Lifecycle Direct Global Warming Potential |
LCGWP: Lifecycle Direct Global Warming Potential |
GWPr: Global Warming Potential of Refrigerant |
GWPr: Global Warming Potential of Refrigerant |
ODPr: Ozone Depletion Potential of Refrigerant |
ODPr: Ozone Depletion Potential of Refrigerant |
Lr: Refrigerant Leakage Rate |
Lr: Refrigerant Leakage Rate |
Mr: End-of-life Refrigerant Loss |
Mr: End-of-life Refrigerant Loss |
Rc: Refrigerant Charge |
Rc: Refrigerant Charge |
Life: Equipment Life |
Life: Equipment Life |
For multiple types of equipment, calculate a weighted average of all base building HVAC&R equipment, using the following formula:
IP units |
|
SI units |
|
|---|---|---|---|
∑ ( LCGWP + LCODP x 105 ) x Qunit |
≤ 100 |
∑ ( LCGWP + LCODP x 105 ) x Qunit |
≤ 13 |
Qtotal |
Qtotal |
||
Calculation definitions for |
Calculation definitions for |
|---|---|
| (IP units) | (SI units) |
Qunit = Gross AHRI rated cooling capacity of an individual HVAC or refrigeration unit (Tons) |
Qunit = Eurovent Certified cooling capacity of an individual HVAC or refrigeration unit (kW) |
Qtotal = Total gross AHRI rated cooling capacity of all HVAC or refrigeration |
Qtotal = Total Eurovent Certified cooling capacity of all HVAC or refrigeration (kW) |
Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »In the end, LEED is all about documentation. LEEDuser’s Documentation Toolkit, for premium members only, saves you time and helps you avoid mistakes with:
- Calculators to help assess credit compliance.
- Tracking spreadsheets for materials purchases.
- Spreadsheets and forms to give to subs and other team members.
- Guidance documents on arcane LEED issues.
- Sample templates to help guide your narratives and LEED Online submissions.
- Examples of actual submissions from certified LEED projects.
|
How can I determine the leakage rate of my equipment? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
Should all commercial refrigerant equipment be accounted for, including both upright and under-counter? What about walk-in refrigerators? Ice makers? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
I'm working on a renovation project and we'll be keeping some of the existing equipment. Should we include these systems in our calculations? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
What is the required timeline for completing a CFC phase-out for this credit? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
The refrigerant type I need to enter is missing from the credit form. What should I do? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
|
Are HCFC or HFC refrigerants considered CFC-based refrigerants? The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
What capacity is to be used for centrifugal chillers that, due to their selection conditions, cannot operate at AHRI standard conditions?
The AHRI flow rates are based on capacity. This leads to circular calculation since AHRI standard conditions are dependent on capacity, but capacity is the desired output. How does the project team resolve this circular calculation?
To determine the Gross AHRI rated cooling capacity (tons) of an individual HVAC or refrigeration unit that cannot operate at AHRI standard conditions, use the design and selected conditions of the equipment drawing or schedule. Enter this cooling capacity in the Qunit (tons) column in Table. Mechanical and Cooling and Refrigeration Equipment in the credit form.
To determine unit capacity in tons for centrifugal chillers that cannot operate at AHRI standard conditions, use selected flow rates for the evaporator, and use standard AHRI temperatures established for the individual HVAC or refrigeration unit.
LEEDuser expert
Paul Swierc
CEM, CPMP, BECxP, CxA+BE, EIT, LEED GA
WSP
Senior Commissioning Agent
