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
The Eccotemp SmartHome SH22i is the better tankless water heater overall, rated 3.2 to 2.7. The Eccotemp SmartHome SH22i leads on value and heating power. The Rinnai V53De wins on warranty. The Eccotemp SmartHome SH22i costs $242.65 less ($499 vs $741.65).
Rinnai V53De
#19 in GasFull review
A low cost outdoor heater from a major brand for a small home, cabin or condo in a mild climate.
Amazon $741.65 Amazon $741.65$741.65
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 Eccotemp SmartHome SH22i for value ($3.56 per 1,000 BTU/h ($499, 140,000 BTU/h) vs $6.18 per 1,000 BTU/h ($741.65, 120,000 BTU/h)) and heating power (140,000 BTU/h vs 120,000 BTU/h).
- Choose the Rinnai V53De for warranty (10-year heat exchanger warranty vs 5-year heat exchanger warranty).
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 | Eccotemp SmartHome SH22i | Rinnai V53De |
|---|---|---|
| Overall rating | 3.2/5 | 2.7/5 |
| Value 35% | 100 $3.56 per 1,000 BTU/h ($499, 140,000 BTU/h) | 60 $6.18 per 1,000 BTU/h ($741.65, 120,000 BTU/h) |
| Heating power 25% | 25 140,000 BTU/h | 0 120,000 BTU/h |
| Efficiency 15% | 50 UEF not published (neutral score used) | 6 0.81 UEF |
| Warranty 25% | 0 5-year heat exchanger warranty | 50 10-year heat exchanger warranty |
Specifications
| Eccotemp SmartHome SH22i | Rinnai V53De | |
|---|---|---|
| Heating | ||
| Fuel | Gas | Gas |
| Gas type | Natural gas or propane | Natural gas or propane |
| Gas input | 140,000 BTU/h | 15,500 to 120,000 BTU/h |
| Max flow | 6.8 GPM | 5.3 GPM |
| UEF | - | 0.81 |
| Condensing | No | No |
| ENERGY STAR | - | No |
| Installation | ||
| Venting | Indoor | Outdoor |
| Weight | - | 29.7 lb |
| Features | ||
| Built-in recirculation | No | No |
| Wi-Fi | Yes | No |
| Heat exchanger warranty | 5 years | 10 years |
| Parts warranty | 2 years | 5 years |