Eccotemp 7GB Builder Grade
#3 in GasFull review
A strong value outdoor heater for a natural gas home in a mild climate, with a better warranty than most budget rivals.
Amazon $499$499
The Eccotemp 7GB Builder Grade rates 4.1 among gas tankless water heaters; the EcoSmart ECOS 27 rates 3.3 among electric ones. The Eccotemp 7GB Builder Grade costs $50 less ($499 vs $549).
EcoSmart ECOS 27
#7 in ElectricFull review
A low cost whole home heater for a two bathroom house in a warm climate. The short warranty is the tradeoff for the price.
Amazon $549$549
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.
Scores side by side
These two sit in different fuel classes (gas and electric), and each is scored against the reference points for its own class, so a rating says how well each does among its own fuel peers. How we rank explains each factor.
| Factor weight | Eccotemp 7GB Builder Grade | EcoSmart ECOS 27 |
|---|---|---|
| Overall rating | 4.1/5 | 3.3/5 |
| Value 35% | 100 $2.77 per 1,000 BTU/h ($499, 180,000 BTU/h) | 60 $20.33 per kW ($549, 27 kW) |
| Heating power 25% | 76 180,000 BTU/h | 64 27 kW |
| Efficiency 15% | 50 UEF not published (neutral score used) | 50 0.94 UEF |
| Warranty 25% | 50 10-year heat exchanger warranty | 29 5-year heat exchanger warranty |
Specifications
| Eccotemp 7GB Builder Grade | EcoSmart ECOS 27 | |
|---|---|---|
| Heating | ||
| Fuel | Gas | Electric |
| Gas type | Natural gas | - |
| Gas input | 180,000 BTU/h | - |
| Electric power | - | 27 kW |
| Max flow | 7 GPM | 6.6 GPM |
| UEF | - | 0.94 |
| Condensing | No | - |
| Installation | ||
| Venting | Outdoor | - |
| Voltage | - | 240 V |
| Breakers | - | 120 A total |
| Weight | - | 10.9 lb |
| Features | ||
| Built-in recirculation | No | No |
| Wi-Fi | No | No |
| Heat exchanger warranty | 10 years | 5 years |
| Parts warranty | 5 years | 1 year |