4-GPM Gas Tankless Water Heaters
Gas tankless water heaters rated at about 4 gallons per minute under the DOE test's roughly 67 °F temperature rise. At a milder rise the same units deliver more flow — roughly 4.9 GPM at 55 °F.
10 certified models in this category.
| Model | Uniform Energy Factor (UEF) | Fuel | First-hour rating | Max flow rate | Rated storage volume | Smart / connected capable |
|---|---|---|---|---|---|---|
| Bradford White RTGR150N1 | 0.98 | Natural Gas | — | 4.3 GPM | — | No |
| Bradford White RTGR150X1 | 0.98 | Propane | — | 4.3 GPM | — | No |
| Midea JSG40-24PCH-LP | 0.95 | Propane | — | 4.4 GPM | — | No |
| Midea JSG40-24PCH-NG | 0.95 | Natural Gas | — | 4.4 GPM | — | No |
| Midea MGWH150IXNN | 0.95 | Natural Gas | — | 4.4 GPM | — | No |
| Midea MGWH150IXPN | 0.95 | Propane | — | 4.4 GPM | — | No |
| Navien NPE-180A2 | 0.95 | Natural Gas, Propane | — | 4.3 GPM | — | No |
| Navien NPE-180S2 | 0.96 | Natural Gas, Propane | — | 4.4 GPM | — | No |
| Rinnai RX130I REU-NB2024FF-US | 0.97 | Natural Gas, Propane | — | 3.8 GPM | — | No |
| Vesta VRP-150 | 0.95 | Natural Gas, Propane | — | 4.3 GPM | — | No |