N
#36
Navien NPE-180S2
Best for: Official UEF 0.96, maximum 4.4 GPM, minimum activation 1 GPM
2.0/10
What we like
- Official certified ratings are published for every scored criterion
Watch out for
- Lower official maximum flow in this set (4.4 GPM)
- Highest official minimum activation flow in this comparison (1 GPM)
- ENERGY STAR does not list this model as connected-capable
Score breakdown
| Uniform energy factor | 0.96 |
|---|---|
| Maximum flow | 4.4 GPM |
| Minimum activation flow | 1 GPM |
| Connected capable | No |
| Uniform energy factor (ENERGY STAR UEF) | 0.96 |
| Maximum flow (ENERGY STAR) | 4.4 GPM |
| Minimum activation flow (ENERGY STAR) | 1 GPM |
| Fuel (ENERGY STAR) | Natural Gas, Propane |
| Vent type (ENERGY STAR) | Power Direct Vent |
| Input rate (ENERGY STAR) | 150,000 BTU/h |
| Annual natural-gas use (ENERGY STAR) | 176 therms/year |
| Maximum GPM per 10,000 BTU/h (computed) | 0.29 GPM per 10,000 BTU/h, computed as certified maximum GPM ÷ certified input rate |
| Connected capable (ENERGY STAR) | No |
| Draw pattern (ENERGY STAR) | High-Usage |
| Recovery efficiency (ENERGY STAR) | Not listed |
| Dimensions (ENERGY STAR) | 27 × 17 × 13 in (H × W × D) |
| Certified model number | NPE-180S2 |
| Official brand name on the ENERGY STAR record | Navien |
| Price | Check price |