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SPECIAL REPORT
LEEDuser expert
Paul Swierc
CEM, CPMP, BECxP, CxA+BE, EIT, LEED GA
WSP
Senior Commissioning Agent
SPECIAL REPORT
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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 LCGWP + LCODP x 105 ≤ 100 (IP units) |
Calculation definitions for LCGWP + LCODP x 105 ≤ 13 (SI units) |
|---|---|
| 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 (lb CFC 11/Ton-Year) |
LCODP: Lifecycle Ozone Depletion Potential (kg CFC 11/(kW/year)) |
| LCGWP: Lifecycle Direct Global Warming Potential (lb CO2/Ton-Year) |
LCGWP: Lifecycle Direct Global Warming Potential (kg CO2/kW-year) |
| GWPr: Global Warming Potential of Refrigerant (0 to 12,000 lb CO2/lbr) |
GWPr: Global Warming Potential of Refrigerant (0 to 12,000 kg CO2/kg r) |
| ODPr: Ozone Depletion Potential of Refrigerant (0 to 0.2 lb CFC 11/lbr) |
ODPr: Ozone Depletion Potential of Refrigerant (0 to 0.2 kg CFC 11/kg r) |
| Lr: Refrigerant Leakage Rate (2.0%) |
Lr: Refrigerant Leakage Rate (2.0%) |
| Mr: End-of-life Refrigerant Loss (10%) |
Mr: End-of-life Refrigerant Loss (10%) |
| Rc: Refrigerant Charge (0.5 to 5.0 lbs of refrigerant per ton of gross AHRI rated cooling capacity) |
Rc: Refrigerant Charge (0.065 to 0.65 kg of refrigerant per kW of AHRI rated or Eurovent Certified cooling capacity) |
| Life: Equipment Life (10 years; default based on equipment type, unless otherwise demonstrated) |
Life: Equipment Life (10 years; default based on equipment type, unless otherwise demonstrated) |
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 [ ∑ (LCGWP + LCODP x 105) x Qunit ] / Qtotal ≤ 100 |
Calculation definitions for [ ∑ (LCGWP + LCODP x 105) x Qunit ] / Qtotal ≤ 13 |
|---|---|
| (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) |
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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.
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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 LCGWP + LCODP x 105 ≤ 100 (IP units) |
Calculation definitions for LCGWP + LCODP x 105 ≤ 13 (SI units) |
|---|---|
| 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 (lb CFC 11/Ton-Year) |
LCODP: Lifecycle Ozone Depletion Potential (kg CFC 11/(kW/year)) |
| LCGWP: Lifecycle Direct Global Warming Potential (lb CO2/Ton-Year) |
LCGWP: Lifecycle Direct Global Warming Potential (kg CO2/kW-year) |
| GWPr: Global Warming Potential of Refrigerant (0 to 12,000 lb CO2/lbr) |
GWPr: Global Warming Potential of Refrigerant (0 to 12,000 kg CO2/kg r) |
| ODPr: Ozone Depletion Potential of Refrigerant (0 to 0.2 lb CFC 11/lbr) |
ODPr: Ozone Depletion Potential of Refrigerant (0 to 0.2 kg CFC 11/kg r) |
| Lr: Refrigerant Leakage Rate (2.0%) |
Lr: Refrigerant Leakage Rate (2.0%) |
| Mr: End-of-life Refrigerant Loss (10%) |
Mr: End-of-life Refrigerant Loss (10%) |
| Rc: Refrigerant Charge (0.5 to 5.0 lbs of refrigerant per ton of gross AHRI rated cooling capacity) |
Rc: Refrigerant Charge (0.065 to 0.65 kg of refrigerant per kW of AHRI rated or Eurovent Certified cooling capacity) |
| Life: Equipment Life (10 years; default based on equipment type, unless otherwise demonstrated) |
Life: Equipment Life (10 years; default based on equipment type, unless otherwise demonstrated) |
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 [ ∑ (LCGWP + LCODP x 105) x Qunit ] / Qtotal ≤ 100 |
Calculation definitions for [ ∑ (LCGWP + LCODP x 105) x Qunit ] / Qtotal ≤ 13 |
|---|---|
| (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) |
LEEDuser expert
Paul Swierc
CEM, CPMP, BECxP, CxA+BE, EIT, LEED GA
WSP
Senior Commissioning Agent
