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.
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Every Rinnai EX Energysaver model we rank, smallest first. Ratings compare each against its own venting.
| Model | Output | Rating | Price |
|---|---|---|---|
| Rinnai EnergySaver EX08DTN | 8,000 BTU/hr | 3.4/5 | $1,401.75 |
| Rinnai EnergySaver EX11DTN | 11,000 BTU/hr | 3.5/5 | $1,677.06 |
| Rinnai EnergySaver EX17DTN | 16,700 BTU/hr | 3.7/5 | $2,005.92 |
| Rinnai EnergySaver EX22DTN (this one) | 21,500 BTU/hr | 3.9/5 | $2,218.86 |
| Rinnai EnergySaver EX38DTN | 38,400 BTU/hr | 4.4/5 | $2,642.22 |
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its venting. How we rank explains each one.
| Model number | EX22DTN |
|---|---|
| Heat | |
| Venting | Direct vent |
| Heat type | Furnace |
| Maximum input | 21,500 BTU/hr |
| Minimum input | 8,200 BTU/hr |
| Efficiency | 81% AFUE |
| Fuel and controls | |
| Fuel | Natural gas |
| Thermostat | Yes |
| Blower | Yes |
| Ignition | Electronic (120 V) |
| Needs an outlet | Yes |
| Build | |
| Weight | 51 lb |
| Warranty | 5 years |
For a small home, cabin or open plan space that needs one wall unit as the main heat source with modern thermostat control. Owners in outage prone areas should plan a backup.
Amazon $2,642.22For a large room or small home zone that needs steady, thermostat controlled heat. The EX22DTN is worth the small step up if the space is borderline.
Amazon $2,005.92For 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 $1,677.06Compare the Rinnai EnergySaver EX22DTN with any other gas wall heater →
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