16 CFR Part 305, Appendix D4
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| Capacity | Range of estimated annual energy costs(dollars/year) |
|---|---|
| Capacity (maximum flow rate); gallons per minute (gpm) | Natural gas($/year) | Propane($/year) |
| Low | High | Low | High |
| “Very Small”—less than 1.6 | 24 | 30 | 50 | 61 |
| “Low”—1.7 to 2.7 | (*) | (*) | (*) | (*) |
| “Medium”—2.8 to 3.9 | 144 | 170 | 291 | 343 |
| “High”—4.0 and over | 210 | 253 | 427 | 511 |
(*) No data.
[88 FR 1136, Jan. 9, 2023]