Rinnai RE140e
#17 in GasFull review
A good outdoor heater for a one or two bathroom home in a mild climate.
Amazon $884.10 Amazon $884.10$884.10
The Rinnai RE140e is the better tankless water heater overall, rated 3.3 to 3.2. The Rinnai RE140e leads on warranty. The Eccotemp SmartHome SH22i wins on value. The Eccotemp SmartHome SH22i costs $385.10 less ($499 vs $884.10).
Eccotemp SmartHome SH22i
#18 in GasFull review
An affordable smart heater for a small home that wants app control without paying for a premium brand.
Amazon $499 Amazon $499$499
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Rinnai RE140e for warranty (15-year heat exchanger warranty vs 5-year heat exchanger warranty).
- Choose the Eccotemp SmartHome SH22i for value ($3.56 per 1,000 BTU/h ($499, 140,000 BTU/h) vs $6.32 per 1,000 BTU/h ($884.10, 140,000 BTU/h)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every gas tankless water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Rinnai RE140e | Eccotemp SmartHome SH22i |
|---|---|---|
| Overall rating | 3.3/5 | 3.2/5 |
| Value 35% | 58 $6.32 per 1,000 BTU/h ($884.10, 140,000 BTU/h) | 100 $3.56 per 1,000 BTU/h ($499, 140,000 BTU/h) |
| Heating power 25% | 25 140,000 BTU/h | 25 140,000 BTU/h |
| Efficiency 15% | 6 0.81 UEF | 50 UEF not published (neutral score used) |
| Warranty 25% | 100 15-year heat exchanger warranty | 0 5-year heat exchanger warranty |
Specifications
| Rinnai RE140e | Eccotemp SmartHome SH22i | |
|---|---|---|
| Heating | ||
| Fuel | Gas | Gas |
| Gas type | Natural gas or propane | Natural gas or propane |
| Gas input | 10,400 to 140,000 BTU/h | 140,000 BTU/h |
| Max flow | 5.3 GPM | 6.8 GPM |
| UEF | 0.81 | - |
| Condensing | No | No |
| ENERGY STAR | No | - |
| Installation | ||
| Venting | Outdoor | Indoor |
| Weight | 38.3 lb | - |
| Features | ||
| Built-in recirculation | No | No |
| Wi-Fi | No | Yes |
| Heat exchanger warranty | 15 years | 5 years |
| Parts warranty | 5 years | 2 years |