If the user does not know the leakage rate, the user can use an estimated annual leakage rate for the type of equipment. Choose from the lists below:
DEFRA UK
Type of Equipment and their Estimated Annual Leakage
| Type of Equipment | Annual Leakage Rate |
| Domestic Refrigeration | 0.30% |
| Small Hermetic Stand-Alone Refrigeration Units | 1.50% |
| Condensing Units | 10.00% |
| Centralised Supermarket Refrigeration Systems | 17.00% |
| Industrial Systems | 8.00% |
| Small Stationary Air Conditioning | 3.00% |
| Medium Stationary Air Conditioning | 6.00% |
| Large Stationary Air Conditioning (Chillers) | 3.00% |
| Heat Pumps | 6.00% |
| Land Transport Refrigeration | 15.00% |
| Marine Transport Refrigeration | 39.00% |
| Light-Duty Mobile Air Conditioning | 10.00% |
| Other Mobile Air Conditioning | 10.00% |
IPPC All Countries Leakage Rates
| Table 2. Default Assumptions from IPCC Good Practice Guidelines* | |
| Application | Annual Leakage Rate |
| Domestic Refrigeration | 0.1 - 0.5 % |
| Stand-Alone Commercial Applications | 1 - 10 % |
| Medium and Large Commercial refrigeration | 10 - 30 % |
| Transport Refrigeration | 15 - 50 % |
| Industrial Refrigeration including Food Processing and Cold Storage | 7 - 25 % |
| Chillers | 2 - 15 % |
| Residential and Commercial A/C, including Heat Pumps | 1 - 5 % |
| Mobile Air Conditioners | 10 - 20 % |
| * These values are from IPCC Good Practice Guidelines and Uncertainty Management in National Greenhouse Gas Inventories (2000).These default values are provided for reference purposes only as their wide range can result in highly variable calculation outcomes. If a value is chosen from within the range, that value should be used consistently from reporting period to reporting period or year to year. They should only be used if entity-specific data are not available, but an inventory that uses these values should be considered preliminary. |