The Rinnai EnergySaver EX22DTN is the better gas wall heater overall, rated 3.9 to 3.2. The Rinnai EnergySaver EX22DTN leads on warranty and controls. The Ashley Hearth DVAG25-DF Dual Fuel wins on value, fuel and heat output. The Ashley Hearth DVAG25-DF Dual Fuel costs $1,318.87 less ($899.99 vs $2,218.86).
The pick of the Rinnai range for a large living area or small cabin that wants quiet, even heat with real thermostat control. Pair it with a backup if outages are common.
Amazon $2,218.86For a cabin, garage apartment or open living area that needs a lot of heat without power, especially if you might switch between propane and natural gas.
Amazon $899.99Prices 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 EX22DTN | Ashley Hearth DVAG25-DF Dual Fuel |
|---|---|---|
| Overall rating | 3.9/5 | 3.2/5 |
| Value 30% | 42 $103.20 per 1,000 BTU ($2,218.86, 21,500 BTU) | 91 $36 per 1,000 BTU ($899.99, 25,000 BTU) |
| Heat output 15% | 38 21,500 BTU/hr | 50 25,000 BTU/hr |
| Controls 20% | 100 thermostat, blower, electronic ignition | 50 thermostat |
| Fuel 5% | 0 natural gas only | 100 runs on propane or natural gas |
| Warranty 30% | 100 5-year warranty | 0 1-year warranty |
| Rinnai EnergySaver EX22DTN | Ashley Hearth DVAG25-DF Dual Fuel | |
|---|---|---|
| Heat | ||
| Venting | Direct vent | Direct vent |
| Heat type | Furnace | Furnace |
| Maximum input | 21,500 BTU/hr | 25,000 BTU/hr |
| Minimum input | 8,200 BTU/hr | - |
| Heating area claim | - | 825 sq ft |
| Efficiency | 81% AFUE | - |
| Fuel and controls | ||
| Fuel | Natural gas | Dual fuel |
| Thermostat | Yes | Yes |
| Blower | Yes | No |
| Ignition | Electronic (120 V) | Push button |
| Needs an outlet | Yes | No |
| Build | ||
| Weight | 51 lb | 62.2 lb |
| Warranty | 5 years | 1 year |
