A top choice for a large home that wants one heater for three or more showers at once with the lowest gas bills Rinnai offers.
Amazon $1,532.79
A strong value outdoor heater for a natural gas home in a mild climate, with a better warranty than most budget rivals.
- 180,000 BTU/hHeating power
- 7 GPMMax flow
- 10 yearsHeat exchanger warranty
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
- 180,000 BTU/h outdoors for $499
- No vent pipe, and a remote control is included
- 10 year heat exchanger warranty, long for a budget brand
- Natural gas only
- No published UEF or weight
- Outdoor mounting suits mild climates best
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its fuel. How we rank explains each one.
Specifications
| Model number | 7GB-NG |
|---|---|
| Heating | |
| Fuel | Gas |
| Gas type | Natural gas |
| Gas input | 180,000 BTU/h |
| Max flow | 7 GPM |
| Condensing | No |
| Installation | |
| Venting | Outdoor |
| Features | |
| Built-in recirculation | No |
| Wi-Fi | No |
| Heat exchanger warranty | 10 years |
| Parts warranty | 5 years |
Alternatives in this fuel
A well priced condensing whole home heater for buyers who want PVC venting and lower gas bills.
Amazon $1,411.70 Amazon $1,411.99A whole home indoor heater for buyers who want maximum burner size without the condensate drain of a condensing unit.
Amazon $1,201.29Compare
Compare the Eccotemp 7GB Builder Grade with any other tankless water heater →
More from Eccotemp: every Eccotemp product ranked.