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.
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 | 21,500 BTU/hr | 3.9/5 | $2,218.86 |
| Rinnai EnergySaver EX38DTN (this one) | 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 | EX38DTN |
|---|---|
| Heat | |
| Venting | Direct vent |
| Heat type | Furnace |
| Maximum input | 38,400 BTU/hr |
| Minimum input | 13,200 BTU/hr |
| Efficiency | 80% AFUE |
| Fuel and controls | |
| Fuel | Natural gas |
| Thermostat | Yes |
| Blower | Yes |
| Ignition | Electronic (120 V) |
| Needs an outlet | Yes |
| Build | |
| Weight | 86 lb |
| Warranty | 5 years |
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 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 EX38DTN with any other gas wall heater →
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