Rheem RTG-70DV
#5 in GasFull review
A budget indoor heater from a major brand for a two bathroom home in a moderate climate.
Amazon $653.77 Amazon $785.13$653.77
The Rheem RTG-70DV and the Gasland Gasmart E CE686 are evenly matched, rated 4.1 and 4.0. The Rheem RTG-70DV leads on efficiency. The Gasland Gasmart E CE686 wins on heating power. The Gasland Gasmart E CE686 costs $23.78 less ($629.99 vs $653.77).
Gasland Gasmart E CE686
#8 in GasFull review
A low priced whole home heater for buyers who accept a short warranty and thin documentation to save several hundred dollars.
Amazon $629.99 Amazon $629.99$629.99
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 Rheem RTG-70DV for efficiency (0.82 UEF vs 0.80 UEF).
- Choose the Gasland Gasmart E CE686 for heating power (199,000 BTU/h vs 160,000 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 | Rheem RTG-70DV | Gasland Gasmart E CE686 |
|---|---|---|
| Overall rating | 4.1/5 | 4.0/5 |
| Value 35% | 98 $4.09 per 1,000 BTU/h ($653.77, 160,000 BTU/h) | 100 $3.17 per 1,000 BTU/h ($629.99, 199,000 BTU/h) |
| Heating power 25% | 51 160,000 BTU/h | 100 199,000 BTU/h |
| Efficiency 15% | 12 0.82 UEF | 0 0.80 UEF |
| Warranty 25% | 100 15-year heat exchanger warranty | 50 heat exchanger warranty not published (neutral score used) |
Specifications
| Rheem RTG-70DV | Gasland Gasmart E CE686 | |
|---|---|---|
| Heating | ||
| Fuel | Gas | Gas |
| Gas type | Natural gas or propane | Natural gas or propane |
| Gas input | 11,000 to 160,000 BTU/h | 199,000 BTU/h |
| Max flow | 7 GPM | 7.6 GPM |
| UEF | 0.82 | 0.80 |
| Condensing | No | No |
| Installation | ||
| Venting | Indoor | Indoor |
| Vent type | 3 in x 5 in concentric Category III stainless | - |
| Weight | 46.5 lb | - |
| Features | ||
| Built-in recirculation | No | No |
| Wi-Fi | No | No |
| Heat exchanger warranty | 15 years | - |
| Parts warranty | 5 years | - |