Rinnai EX38DTWN Direct Vent Wall Furnace – Natural Gas (NG)
The Rinnai EX38DTWN delivers powerful, efficient NG heating in a compact, quiet, wall-mounted design. This Natural Gas version of the EX38DTW series is engineered for large rooms, basements, additions, and hard-to-heat spaces—providing fast, even warmth with sealed combustion to maintain excellent indoor air quality.
Key Benefits
- High-output heating ideal for big rooms, open areas, and cold climates.
- Natural Gas configuration for homes already using NG service.
- Sealed direct-vent system draws air from outdoors for safe indoor air quality.
- Quiet operation suitable for bedrooms, living rooms, or offices.
- Digital thermostat control for accurate, consistent temperature regulation.
- Cool-touch cabinet improves safety in family spaces or high-traffic rooms.
- No ductwork needed—simple, direct wall installation.
Specifications
- Model: EX38DTWN
- Fuel Type: Natural Gas
- BTU Range: ~15,500 – 38,700 BTU/h (NG)
- Efficiency: Up to ~82% AFUE
- Venting: Sealed direct vent
- Thermostat: Integrated digital controller
- Safety: Cool-touch exterior, child lock, oxygen depletion safety
- Warranty: 10-year heat exchanger, 5-year parts, 2-year labor
Common Uses
- Basements, family rooms, garages, and large living areas
- Home additions without ductwork
- Cold regions requiring high-output, zoned heating
- Primary or supplemental heat for Natural Gas homes
FAQ
Is the EX38DTWN the same as the EX38DTWP?
Yes—performance and features are identical. The difference is fuel type:
• EX38DTWN = Natural Gas
• EX38DTWP = Propane (LP)
Does it require outside venting?
Yes—this model uses a sealed direct-vent system for safe, efficient combustion.
The “A” vent kit is included with the EX Series appliance
A Vent Kit No. FOT-151. Fits Walls 4 1/2 - 9 1/2 in (115 - 240 mm)
Can it heat a large space?
Absolutely—its 38k BTU output is sized for larger rooms or difficult heating zones.
Comparison Chart
| Model | Fuel | BTU Range (Min–Max) | Mount / Vent | Dimensions (W×H×D) | Notes |
|---|---|---|---|---|---|
| EX08DT (NG/LP) | NG or LP | 3,000–8,000 BTU/h | Surface-mounted, direct vent | 18.3″ × 27.4″ × 10.1″ | Compact zone heater; thermostat compatible. |
| EX11DT (NG/LP) | NG or LP | NG: 5,500–11,000 • LP: 5,700–11,000 BTU/h | Surface-mounted, direct vent | 18.3″ × 27.4″ × 10.1″ | Small/medium rooms; same cabinet as EX08. |
| EX17DT (NG/LP) | NG or LP | 8,200–16,700 BTU/h | Surface-mounted, direct vent | 29.9″ × 22.9″ × 10.1″ | Great mid-size step-up from EX11. |
| EX22DT (NG/LP) | NG or LP | NG: 8,200–21,500 • LP: 8,200–20,700 BTU/h | Surface-mounted, direct vent | 29.9″ × 22.9″ × 10.1″ | Most popular size; thermostat/Wi-Fi interface ready. |
| EX38DT (NG/LP) | NG or LP | NG: 13,200–38,400 • LP: 13,200–36,500 BTU/h | Surface-mounted, direct vent | 36.6″ × 26.4″ × 13″ | Largest output; approved to 10,200 ft. |
Specs vary by fuel and revision; always verify against the current Rinnai spec sheet for your exact model.
Efficient, Reliable Natural Gas Heating
The Rinnai EX38DTWN delivers high-output NG heating with quiet performance, a compact footprint, and advanced safety features—making it an ideal solution for large or challenging spaces.