The Rinnai EnergySaver EX11DTN is the better gas wall heater overall, rated 3.5 to 3.4. The Rinnai EnergySaver EX08DTN costs $275.31 less ($1,401.75 vs $1,677.06).
For a mid sized room, finished basement or sunroom where you want set-and-forget thermostat control. Buyers who need heat without power should look at a millivolt furnace instead.
Amazon $1,677.06For a bedroom, office or small addition where steady, quiet, thermostat controlled heat matters more than purchase price. Skip it if you need heat through power outages.
Amazon $1,401.75Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Each factor is scored 0-100 against the same fixed reference points for every direct vent gas wall heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Rinnai EnergySaver EX11DTN | Rinnai EnergySaver EX08DTN |
|---|---|---|
| Overall rating | 3.5/5 | 3.4/5 |
| Value 30% | 23 $152.46 per 1,000 BTU ($1,677.06, 11,000 BTU) | 17 $175.22 per 1,000 BTU ($1,401.75, 8,000 BTU) |
| Heat output 15% | 3 11,000 BTU/hr | 0 8,000 BTU/hr |
| Controls 20% | 100 thermostat, blower, electronic ignition | 100 thermostat, blower, electronic ignition |
| Fuel 5% | 0 natural gas only | 0 natural gas only |
| Warranty 30% | 100 5-year warranty | 100 5-year warranty |
| Rinnai EnergySaver EX11DTN | Rinnai EnergySaver EX08DTN | |
|---|---|---|
| Heat | ||
| Venting | Direct vent | Direct vent |
| Heat type | Furnace | Furnace |
| Maximum input | 11,000 BTU/hr | 8,000 BTU/hr |
| Minimum input | 5,500 BTU/hr | 3,000 BTU/hr |
| Efficiency | 81% AFUE | 82% AFUE |
| Fuel and controls | ||
| Fuel | Natural gas | Natural gas |
| Thermostat | Yes | Yes |
| Blower | Yes | Yes |
| Ignition | Electronic (120 V) | Electronic (120 V) |
| Needs an outlet | Yes | Yes |
| Build | ||
| Weight | 42 lb | 42 lb |
| Warranty | 5 years | 5 years |
