Diesel Generator Tier Level Requirements World Wide
Per Montreal Protocol
| kW | hp | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 |
| 0 - 7 | 0 - 10 | Tier 2 | Tier 2 | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final |
| 8 - 18 | 11 - 24 | Tier 2 | Tier 2 | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final |
| 19 - 36 | 25 - 48 | Tier 2 | Tier 2 | Tier 4 Interim | Tier 4 Interim | Tier 4 Interim | Tier 4 Interim | Tier 4 Interim | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final |
| 37 - 55 | 49 - 74 | Tier 2 | Tier 2 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final |
| 56 - 74 | 75 - 99 | Tier 2 | Tier 2 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 4 Interim | Tier 4 Interim | Tier 4 Interim | Tier 4 Final | Tier 4 Final | Tier 4 Final |
| 75 - 129 | 100 - 173 | Tier 2 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 4 Interim | Tier 4 Interim | Tier 4 Interim | Tier 4 Final | Tier 4 Final | Tier 4 Final |
| 130 - 224 | 174 - 301 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 4 Interim | Tier 4 Interim | Tier 4 Interim | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final |
| 225 - 449 | 302 - 602 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 4 Interim | Tier 4 Interim | Tier 4 Interim | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final |
| 450 - 560 | 603 - 751 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 3 | Tier 4 Interim | Tier 4 Interim | Tier 4 Interim | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Final |
| > 560 | > 751 | Tier 2 | Tier 2 | Tier 2 | Tier 2 | Tier 2 | Tier 4 Interim | Tier 4 Interim | Tier 4 Interim | Tier 4 Final | Tier 4 Final | Tier 4 Final | Tier 4 Fina |
