855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 170
Extracted Content
Table 1. Maximum annual refrigerant leakage rate for refrigerant leakage emissions ratios by refrigerant
| Refrigerant name | GWP | Maximum annual refrigerant leakage rate for refrigerant leakage emissions ratio (RLER) | Col4 |
|---|---|---|---|
| Refrigerant name | GWP | RLER ≤ 50 (1 point) | RLER ≤ 25 (2 points) |
| R-12 | 10,900 | 0.5% | 0.3% |
| R-11 | 4,750 | 1.1% | 0.6% |
| R-507 | 3,985 | 1.3% | 0.7% |
| R-404A | 3,922 | 1.3% | 0.7% |
| R-410A | 2,088 | 2.4% | 1.2% |
| R-22 | 1,810 | 2.8% | 1.4% |
| R-407C | 1,774 | 2.9% | 1.5% |
| R-134A | 1,430 | 3.5% | 1.8% |
| R-449A | 1,400 | 3.6% | 1.8% |
| R-470A | 909 | 5.6% | 2.8% |
| R-32 | 675 | 7.5% | 3.8% |
| R-513A | 630 | 8.0% | 4.0% |
| R-450A | 601 | 8.4% | 4.2% |
| R-451A | 149 | 33.6% | 16.8% |
| HFO-1234ze(E) (alternative to R-134a) | 6 | Not limited | Not limited |
| Solstice™ 1233zd(E) | 5 | Not limited | Not limited |
| R-441A | 4 | Not limited | Not limited |
| R-290 (Propane) | 3 | Not limited | Not limited |
| R-744 (CO2) | 1 | Not limited | Not limited |
| R-717 (Ammonia) | 0 | Not limited | Not limited |
| R-718 (Water) | 0 | Not limited | Not limited |
The following strategies support the achievement of these rates:
-
Preventative maintenance . Effective refrigerant management plans include preventative maintenance considerations for all equipment. Regular inspections occurring monthly for larger equipment or quarterly for smaller equipment will increase the chances that minor leaks are corrected early, which leads to lower annual leakage rates.
-
Automatic leak detection . Using automatic leak detection systems provides facility teams with continuous monitoring of refrigerant-containing equipment. When alarms are triggered, immediate corrective action for repair and refrigerant recharge reduces the refrigerant leakage emissions ratio.
-
Existing equipment service . Along with routine maintenance, existing equipment requires service per the manufacturer’s recommendations. Contracting a licensed
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 160