The Rinnai EnergySaver EX22DTN is the better gas wall heater overall, rated 3.9 to 2.5. The Rinnai EnergySaver EX22DTN leads on warranty and controls. The Williams 2203822 Direct Vent Furnace wins on value. The Williams 2203822 Direct Vent Furnace costs $1,069.86 less ($1,149 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 living area or small house on natural gas where heat during outages and a low price matter most. Budget for the thermostat and a licensed installer.
HVACDirect $1,149Prices 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 | Williams 2203822 Direct Vent Furnace |
|---|---|---|
| Overall rating | 3.9/5 | 2.5/5 |
| Value 30% | 42 $103.20 per 1,000 BTU ($2,218.86, 21,500 BTU) | 74 $52.23 per 1,000 BTU ($1,149, 22,000 BTU) |
| Heat output 15% | 38 21,500 BTU/hr | 40 22,000 BTU/hr |
| Controls 20% | 100 thermostat, blower, electronic ignition | 0 manual control, push button ignition |
| Fuel 5% | 0 natural gas only | 0 natural gas only |
| Warranty 30% | 100 5-year warranty | 0 1-year warranty |
| Rinnai EnergySaver EX22DTN | Williams 2203822 Direct Vent Furnace | |
|---|---|---|
| Heat | ||
| Venting | Direct vent | Direct vent |
| Heat type | Furnace | Furnace |
| Maximum input | 21,500 BTU/hr | 22,000 BTU/hr |
| Minimum input | 8,200 BTU/hr | - |
| Efficiency | 81% AFUE | 67% AFUE |
| Fuel and controls | ||
| Fuel | Natural gas | Natural gas |
| Thermostat | Yes | No |
| Blower | Yes | No |
| Ignition | Electronic (120 V) | Push button |
| Needs an outlet | Yes | No |
| Build | ||
| Weight | 51 lb | - |
| Warranty | 5 years | 1 year |
