A wall-mounted vented gas heater can add focused warmth without taking up floor space, but the right choice depends on your fuel supply, room size, and desired controls. These five direct-vent models range from compact heaters for smaller rooms to higher-output options for larger spaces. Compare their fuel type, heat capacity, and features before choosing a unit that fits your home and installation needs.
Table of Contents
Quick Comparison
| Heater | Fuel | Heat Output | Listed Coverage | Standout Feature |
|---|---|---|---|---|
| Comfort Glow 17,000 BTU Direct Vent Wall Heater | Natural gas | 17,000 BTU | Up to 500 sq. ft. | Thermostat and electronic ignition |
| Comfort Glow 11,000 BTU Direct Vent Wall Heater | Propane | 11,000 BTU | Up to 350 sq. ft. | Thermostat and included vent kit |
| Ashley Hearth 11,000 BTU Direct Vent Wall Heater | Propane | 11,000 BTU | Up to 375 sq. ft. | Matchless Piezo lighting |
| Rinnai EX22DTWN Direct Vent Wall Furnace | Natural gas | 21,500 BTU | Not specified | Modulating heat and programmable thermostat |
| Ashley Hearth 25,000 BTU Dual-Fuel Direct Vent Heater | Natural gas or propane | Up to 25,000 BTU | Up to 825 sq. ft. | Dual-fuel design |
Our Picks: Best Vented Gas Heaters Wall Mounted reviews
Comfort Glow 17,000 BTU: Best Natural Gas Pick for Mid-Sized Rooms
This Comfort Glow model is a natural-gas direct-vent heater rated at 17,000 BTU, with listed coverage of up to 500 square feet. Its thermostat is designed to help maintain a chosen temperature, while electronic ignition avoids the need to light a standing pilot by hand.
The sealed burn system vents through the wall, and the supplied kit includes a heat shield, vent pipe, air-intake pipe, vent cap, flashing, and connection rod. The unit is about 20 inches high, 27.3 inches wide, and 6.5 inches deep, so check the wall space and vent route before buying. The product information also states that it operates without electricity, which can be useful during a power outage.
This is a sensible fit if your home uses natural gas and you want more output than the 11,000-BTU options provide. The main trade-off is its wider cabinet, which may be harder to place in a tight area. The stated coverage is a guide, not a guarantee; insulation, room layout, and climate affect how much heat a space needs.
Pros:
- Natural-gas operation with 17,000 BTU of heat output
- Thermostat and electronic ignition
- Includes a direct-vent installation kit
- Listed for rooms up to 500 square feet
Cons:
- Wider than the 11,000-BTU Comfort Glow model
- Requires a suitable wall location and vent opening
Verdict: Choose this Comfort Glow if you have natural gas, need moderate room-heating capacity, and want a thermostat with an included vent kit.
Comfort Glow 11,000 BTU: Compact Propane Heater with a Thermostat
This smaller Comfort Glow is a direct-vent propane heater rated at 11,000 BTU, with listed coverage of up to 350 square feet. Its thermostat provides adjustable heat control, and electronic ignition is included. The manufacturer describes a sealed burn system with a safety pilot and built-in pressure regulator.
The cabinet measures about 20 inches high, 17 inches wide, and 7 inches deep. It includes a vent kit with a heat shield, vent and air-intake pipes, vent cap, flashing, and connection rod. The product information says it operates without electricity, but it requires a propane supply with a minimum 100-pound tank and a two-stage low-pressure regulator.
Compared with the Ashley 11,000-BTU propane model, this heater has a thermostat and a slightly smaller listed coverage area. Its propane setup is an important planning detail: make sure your tank and regulator meet the stated requirements, and verify the installation plan before ordering. Availability can change, so check the listing before making it your only option.
Pros:
- Compact 17-inch-wide cabinet
- Thermostatic heat control and electronic ignition
- Includes a vent kit
- Listed for spaces up to 350 square feet
Cons:
- Requires a minimum 100-pound propane tank
- Requires a two-stage low-pressure regulator
Verdict: Consider this model for a smaller room if you use propane and can meet its tank and regulator requirements.
Ashley Hearth 11,000 BTU: Propane Heat with Matchless Piezo Lighting
Ashley Hearth’s 11,000-BTU heater is built for liquid propane and lists coverage of up to 375 square feet. Its stainless-steel ported burner and sealed burn system are designed for quiet operation, while matchless Piezo lighting provides ignition without a separate match.
The included kit contains a heat shield, air-intake pipe, and connecting rod. Its listed dimensions are about 17.36 inches long, 6.61 inches wide, and 20 inches high. The product information describes a safety pilot with a built-in pressure regulator that shuts off gas if the pilot goes out.
This model may suit a compact room where propane is the available fuel and simple ignition is a priority. Unlike the Comfort Glow propane option, the supplied details do not list a thermostat or specify that the heater operates without electricity. Confirm the installation requirements and included components for your setup rather than assuming the two models have identical features.
Pros:
- Propane heater rated at 11,000 BTU
- Matchless Piezo ignition
- Includes key direct-vent components
- Listed coverage of up to 375 square feet
Cons:
- No thermostat is specified in the supplied product details
- Designed for liquid propane only
Verdict: Pick the Ashley Hearth if you want a compact propane heater with matchless ignition and do not need a listed thermostat feature.
Rinnai EX22DTWN: Programmable Natural Gas Wall Furnace
The Rinnai EX22DTWN is a natural-gas direct-vent wall furnace with a listed maximum output of 21,500 BTU. Its modulating technology adjusts heat output to match demand, and the programmable thermostat lets you set temperatures around your routine. The supplied details do not give a room-size coverage figure, so compare its capacity with the needs of your space before choosing it.
Other listed features include a cool-to-the-touch cabinet, self-diagnostic electronics, and compatibility with Wi-Fi-enabled systems. The manufacturer lists a 10-year heat exchanger warranty, five years for parts, and two years for labor. These controls and warranty terms make it a more feature-rich option than the simpler Comfort Glow and Ashley models.
This unit may suit someone who wants programmable temperature control and a more advanced heating system. The added features may be unnecessary if you simply need basic supplemental heat, and the product details do not list an installation kit or dimensions. Confirm venting, installation, and system compatibility before purchase.
Pros:
- 21,500-BTU natural-gas output
- Modulating heat and programmable thermostat
- Cool-to-the-touch cabinet and self-diagnostic electronics
- Listed warranty coverage for the heat exchanger, parts, and labor
Cons:
- Listed room coverage is not provided
- Installation kit details are not specified in the supplied information
Verdict: Choose the Rinnai if programmable control and modulating heat matter more to you than a simple, basic heater setup.
Ashley Hearth 25,000 BTU: Dual-Fuel Option for Larger Areas
This Ashley Hearth model is listed as a dual-fuel direct-vent heater for natural gas or propane. It delivers up to 25,000 BTU and lists coverage of up to 825 square feet, giving it the highest stated output and coverage in this group. Its stainless-steel ported burner is described as providing quiet on-and-off operation.
The product information also lists a sealed burn system, matchless Piezo lighting, and a safety pilot with a built-in pressure regulator. It is approved for use in mobile or modular homes, according to the supplied details. Unlike the smaller models, its higher capacity may be a better match for a larger area, but actual heating performance depends on the home and room conditions.
Dual-fuel capability offers flexibility when both fuel types are relevant to your home, but do not assume the unit can switch fuels without following the manufacturer’s instructions. The supplied information does not give dimensions or describe the included vent components, so confirm those details before planning installation.
Pros:
- Can use natural gas or propane
- Up to 25,000 BTU of heat output
- Listed coverage of up to 825 square feet
- Matchless Piezo lighting and safety pilot
Cons:
- Dimensions are not specified in the supplied details
- Included vent components are not described
Verdict: Consider this Ashley Hearth for a larger space if you need its higher output and want the option of natural gas or propane.
How to Choose a Wall-Mounted Vented Gas Heater
Match the heater to your fuel supply
Start by checking whether your home uses natural gas, liquid propane, or both. A natural-gas-only model will not suit a propane connection, and a propane heater may have specific tank and regulator requirements. The Ashley Hearth 25,000-BTU model is listed as dual fuel, while the other models in this guide specify one fuel type. Confirm the exact fuel setup and manufacturer instructions before buying.
Choose output for the room, not just the largest number
BTU output indicates heating capacity, but a bigger number is not automatically better for every room. The listed coverage in this guide ranges from 350 to 825 square feet, while the Rinnai listing does not provide a coverage figure. Treat coverage as a starting point: insulation, ceiling height, drafts, climate, and room layout can all affect the heat a space needs. When in doubt, ask a qualified heating professional to help size the unit.
Check thermostat and ignition features
A thermostat can help you set a target temperature, as on the Comfort Glow models and Rinnai. Ignition varies: the Comfort Glow natural-gas model lists electronic ignition, and both Ashley models list matchless Piezo lighting. Consider which controls matter to you and read the product instructions to understand how the heater starts and operates.
Plan the direct-vent route and wall space
Direct-vent heaters send exhaust through an exterior wall, so placement is limited by the vent path and the manufacturer’s clearance requirements. Some models here include a vent kit, but the listed components differ. Compare the heater dimensions with your available wall area, and check the exact installation instructions for wall thickness, clearances, and vent placement before purchasing.
Consider power needs and outage use
The two Comfort Glow models are described as operating without electricity, which may be useful if you want heat during a power outage. The other product details do not make the same claim, so do not assume they have identical power needs. Check each model’s manual for electrical requirements and what features, if any, work without household power.
Review safety details and installation requirements
Several products list a sealed burn system and a safety pilot that stops gas flow if the pilot goes out. These features do not replace careful installation or regular attention to the manufacturer’s instructions. Confirm local requirements, use the specified fuel and vent components, and consult a qualified installer if you are unsure about gas connections or wall venting.
Compare warranty terms and missing specifications
Warranty coverage varies. The Comfort Glow models list a two-year limited warranty, and the Rinnai listing specifies separate coverage periods for the heat exchanger, parts, and labor. For products where details such as dimensions, coverage, or included parts are not stated, check the manufacturer’s documentation and product listing before committing to an installation plan.
Frequently Asked Questions
What does direct vent mean on a wall-mounted gas heater?
A direct-vent heater sends exhaust through a vent in an exterior wall rather than requiring a chimney. The exact vent arrangement and installation requirements depend on the model, so follow its instructions and verify that your planned location is suitable.
Can I use a propane heater with natural gas?
Not unless the specific heater is designed for that fuel or the manufacturer provides an approved conversion process. The Ashley Hearth 25,000-BTU model is listed for natural gas or propane. The other models here specify either natural gas or propane, so match the unit to your available fuel.
Will these heaters work during a power outage?
The supplied details say that both Comfort Glow heaters operate without electricity. They do not make that claim for the Ashley or Rinnai models. Check the manual for the specific unit to confirm its power needs and which functions may be available during an outage.
How do I know what size heater I need?
Start with the room’s area and compare it with the manufacturer’s listed coverage, but do not use square footage alone. Insulation, ceiling height, outdoor temperatures, and drafts can change the amount of heat needed. A heating professional can help assess your space if the right capacity is unclear.
Do these heaters include everything needed for installation?
Not necessarily. The Comfort Glow models list a vent kit, and the Ashley 11,000-BTU model lists a heat shield, air-intake pipe, and connecting rod. The supplied details for the Rinnai and Ashley 25,000-BTU models do not describe all included vent parts. Check the manufacturer’s instructions and listing before arranging installation.
Are wall-mounted vented gas heaters suitable for bedrooms?
The supplied product information specifically lists the two Comfort Glow models as approved for bedrooms. The Ashley 11,000-BTU model is described as suitable for bedrooms and living spaces. For other models, check the manufacturer’s stated approvals and follow local rules and installation instructions.
Which heater is the best choice for most shoppers?
The Comfort Glow 17,000-BTU model is a balanced option if you have natural gas, want thermostat control, and need a listed capacity of up to 500 square feet. For a larger space, consider the Ashley 25,000-BTU dual-fuel model; for advanced programmable controls, compare the Rinnai.
Final Recommendation
For a practical middle ground, the Comfort Glow 17,000-BTU natural-gas heater combines thermostat control, electronic ignition, an included vent kit, and listed coverage of up to 500 square feet. Choose the Ashley Hearth 25,000-BTU model when you need more output or dual-fuel flexibility, and the Rinnai when programmable control and modulating heat are priorities. Before ordering any of them, confirm fuel compatibility, installation requirements, and the right capacity for your room.
