Midea JSG40-24PCH-NG vs Navien NPE-240S2
The Navien NPE-240S2 is the more efficient unit: UEF 0.96 versus 0.95 — about 1% less energy for the same hot water. At national average rates that works out to about $255/year for the Navien NPE-240S2 against $257/year for the Midea JSG40-24PCH-NG — a $2 annual difference. The Navien NPE-240S2 sustains the higher flow (5.8 GPM vs 4.4 GPM under the DOE test).
| Midea JSG40-24PCH-NG | Navien NPE-240S2 | |
|---|---|---|
| Uniform Energy Factor (UEF) | 0.95 | 0.96 |
| Fuel | Natural Gas | Natural Gas, Propane |
| Max flow rate | 4.4 GPM | 5.8 GPM |
| Draw pattern | High | High |
| Annual gas use (natural gas) | 177 therms/yr | 176 therms/yr |
| Gas input rate | 150 kBTU/h | 199 kBTU/h |
| Max current draw | 1.1 A | 5 A |
| Vent type | Power Direct Vent | Power Direct Vent |
| Recovery efficiency | 0.96 % | — |
| Smart / connected capable | No | No |
| Minimum activation flow | 0.5 GPM | 1 GPM |
| Annual propane use | 193.44 gal/yr | 192.35 gal/yr |
| Vent size | 2 / 3 | 2 |
| Height | 26.8 in | 27 in |
| Width | 17.3 in | 17 in |
| Depth | 11 in | 13 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the Midea JSG40-24PCH-NG or the Navien NPE-240S2?
The Navien NPE-240S2: about $255/year versus $257/year for the Midea JSG40-24PCH-NG at national average rates — a $2 annual difference.
Are the Midea JSG40-24PCH-NG and Navien NPE-240S2 both ENERGY STAR certified?
Yes — every water heater in this database is drawn from the U.S. EPA ENERGY STAR certified water heater datasets.