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Gas Heaters For Indoor Use

10 Best Gas Heaters For Indoor Use 2025 in the United States

#1

Winner

9.9 score

Rinnai EX38DTWN Direct Vent Wall Furnace, Indoor Natural Gas Heater, Energy Efficient Space Heater, 38,400 BTU, White

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Rinnai EX38DTWN Direct Vent Wall Furnace, Indoor Natural Gas Heater, Energy Efficient Space Heater, 38,400 BTU, White

Rinnai

9.9 score

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The Rinnai EX38DTWN Direct Vent Wall Furnace is an indoor natural gas heater designed to deliver efficient and consistent heating with a capacity of 38,400 BTU. This makes it suitable for medium to large rooms, up to 1600 square feet. Its advanced modulating technology ensures even heat distribution, eliminating cold spots and providing a cozy environment.

Rating
9.9
Chosen by1,495
Heating Capacity (BTU)
Ventilation Requirements
Thermostat Control

Most important from
91 reviews

Heating Capacity (BTU)
Guests have complimented its exceptionally high heat output and quiet operation, showcasing its top-of-the-line performance.
Ventilation Requirements
The venting system is highly appreciated, requiring only a simple hole through the exterior wall, making installation fast and easy.
Thermostat Control
Its automatic variable heat output based on the room's heating needs and ease of programming make it a well-thought-out design.
Size and Portability
The Rinnai Direct Vent Wall Furnace keeps spaces dry all winter, is very quiet, and takes up little floor space, making it a highly recommended choice.
#2
9.8 score

Rinnai EX22DTWN Direct Vent Wall Furnace, Indoor Natural Gas Heater, Energy Efficient Space Heater, 21,500 BTU, White

Rinnai EX22DTWN Direct Vent Wall Furnace, Indoor Natural Gas Heater, Energy Efficient Space Heater, 21,500 BTU, White

Rinnai

9.8 score

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The Rinnai EX22DTWN Direct Vent Wall Furnace is a robust indoor natural gas heater, boasting a heating capacity of 21,500 BTU, which makes it well-suited for maintaining warmth in various room sizes. One of its standout features is the advanced modulating technology that enables consistent and efficient heating, ensuring that cold spots are effectively eliminated. This can be particularly beneficial for those seeking a comfortable and evenly heated living space. Additionally, the heater's programmable thermostat provides customizable comfort, allowing users to set specific temperatures and even integrate with Wi-Fi systems for added convenience.

Rating
9.8
Heating Capacity (BTU)
Safety Features
Thermostat Control

Most important from
91 reviews

Heating Capacity (BTU)
The Rinnai unit boasts exceptionally high heat output and quiet operation, making it a top-of-the-line choice.
Safety Features
The heater maintains a safety temperature to prevent freezing, providing peace of mind when away from home.
Thermostat Control
The automatic variable heat output adjusts based on the room's heating needs, ensuring consistent comfort.
Size and Portability
Quieter and more even heat distribution compared to previous models, with no loud turbo cycling sounds.
#3
9.7 score

Mr Heater 4000 to 18000 BTU 3 Setting Portable LP Gas Heater Unit with Dual Tank Connection for Indoor and Outdoor Use, Black/Red

Mr Heater 4000 to 18000 BTU 3 Setting Portable LP Gas Heater Unit with Dual Tank Connection for Indoor and Outdoor Use, Black/Red

Mr. Heater

9.7 score

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The Mr. Heater 4000 to 18000 BTU portable propane gas heater is a versatile option for indoor and outdoor use. It offers a range of heating capacities (4,000, 9,000, or 18,000 BTU) which makes it suitable for various room sizes up to 450 square feet. One of its key strengths is the dual tank connection, allowing you to use up to 40 lbs propane tanks with an additional hose and filter, giving flexibility depending on your heating needs. It’s user-friendly with a single control start knob and piezo sparking mechanism, making it easy to operate.

Rating
9.7
Heating Capacity (BTU)
Type of Gas
Safety Features

Most important from
5498 reviews

Heating Capacity (BTU)
The heater effectively warms up rooms and can be tailored to specific heating needs, from 4,000 BTU to 18,000 BTU, without any unpleasant smells.
Type of Gas
Using the heater with a 12' hose and regulator for low-pressure propane supply has proven to be very efficient.
Safety Features
Safety mechanisms, like the automatic shutoff when tilted, work reliably even with slight inclinations.
Ventilation Requirements
It is a good value product, performing well in various settings, including garages, with proper ventilation.

Top 10 Best Gas Heaters For Indoor Use 2025 in the United States

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LIFE SMART

LIFE SMART LifeSmart 6 Element Quartz w/Wood Cabinet and Remote Large Room Infrared Heater, Brown

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#1

Winner

9.9  score
Slide 1Slide 2Slide 3

Rinnai

Rinnai EX38DTWN Direct Vent Wall Furnace, Indoor Natural Gas Heater, Energy Efficient Space Heater, 38,400 BTU, White

Heating Capacity (BTU): 38,400
Type of Gas: Natural Gas
Safety Features: Cool-to-touch, self-diagnostic electronics
Ventilation Requirements: Direct vent
Thermostat Control: Programmable, Wi-Fi-enabled
Size and Portability: Compact, wall-mounted, 108 pounds

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7% OFF

Chosen by 1495 this week

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LIFE SMART

LIFE SMART LifeSmart 6 Element Quartz w/Wood Cabinet and Remote Large Room Infrared Heater, Brown

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#2
9.8  score
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Rinnai

Rinnai EX22DTWN Direct Vent Wall Furnace, Indoor Natural Gas Heater, Energy Efficient Space Heater, 21,500 BTU, White

Heating Capacity (BTU): 21,500
Type of Gas: natural gas
Safety Features: cool-to-touch, self-diagnostic electronics
Ventilation Requirements: direct vent design
Thermostat Control: programmable thermostat
Size and Portability: compact, wall-mounted design

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#3
9.7  score
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Mr. Heater

Mr Heater 4000 to 18000 BTU 3 Setting Portable LP Gas Heater Unit with Dual Tank Connection for Indoor and Outdoor Use, Black/Red

Heating Capacity (BTU): 4000 to 18000
Type of Gas: Propane
Safety Features: Automatic shutoff, Low-oxygen shutoff
Size and Portability: 16.7”D x 11.2”W x 12”H, 15 lbs

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#4
9.4  score
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Mr. Heater

Mr. Heater 30,000 BTU Vent Free Radiant Propane Heater For Cold Rooms, Additions, Sun Rooms & Cabins - White

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#5
9.2  score
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ProCom

ProCom Ventless 25,000 BTU Space Saving Free Standing Dual Fuel Fireplace with Built In Thermostat Control Heats up to 1,100 Square Feet, Black

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#6
8.9  score
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Rinnai

Rinnai FC824P Ventless Propane Heater, Energy-Efficient Space Heater with Programmable Thermostat

Type of Gas: Propane
Safety Features: flame failure device, overheat switch
Ventilation Requirements: ventless and ductless
Thermostat Control: programmable thermostat
Size and Portability: 2"D x 2"W x 2"H, 1 pound

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#7
8.6  score
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Mr. Heater

Mr. Heater MHVFBF30NGT 30,000 BTU Vent Free Blue Flame Natural Gas Heater - Wall Mount Space Heater For Cold Rooms, Sun-rooms, and more - White

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#8
8.3  score
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Mr. Heater

Mr. Heater MHVFBF20LPT 20,000 BTU Blue Flame Vent Free Propane Heater For Cold Rooms, Additions, Sun Rooms Cabins & Garage - White

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#9
8.0  score
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Mr. Heater

Mr. Heater F299730 30,000 BTU Blue Flame Vent Free Propane Heater For Cold Rooms, Additions, Sun Rooms Cabins & Garage - White

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#10
7.8  score
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Dyna-Glo

Dyna-Glo Signature Series 20,000 BTU Liquid Propane Blue Flame Thermostatic Vent Free Wall Heater

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15% OFF
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Buying Guide for the Best Gas Heaters For Indoor Use

Choosing the right gas heater for indoor use involves understanding your specific needs and the key specifications that will ensure safety, efficiency, and comfort. Gas heaters can be a great way to keep your home warm, but it's important to select one that fits your space and usage requirements. Here are the key specifications to consider when picking a gas heater for indoor use.
Heating Capacity (BTU)Heating capacity, measured in British Thermal Units (BTU), indicates how much heat the heater can produce. This is important because it determines how effectively the heater can warm up your space. For small rooms, a heater with a lower BTU rating (around 5,000-10,000 BTUs) is sufficient. Medium-sized rooms may require 10,000-20,000 BTUs, while large rooms or open spaces might need 20,000-30,000 BTUs or more. To pick the right one, consider the size of the room you want to heat and choose a heater with an appropriate BTU rating to ensure efficient heating.
Type of GasGas heaters can use different types of gas, such as natural gas or propane. This specification is important because it affects the installation and running costs. Natural gas heaters are typically connected to a gas line and are more cost-effective for long-term use, while propane heaters use refillable tanks and offer more flexibility in terms of placement. To choose the right type, consider the availability of natural gas in your area and whether you prefer the convenience of a fixed installation or the portability of a propane heater.
Safety FeaturesSafety features are crucial for indoor gas heaters to prevent accidents and ensure safe operation. Key safety features include oxygen depletion sensors (ODS), which shut off the heater if oxygen levels drop too low, and tip-over switches, which turn off the heater if it is knocked over. Other important features include overheat protection and child safety locks. When choosing a heater, prioritize models with comprehensive safety features to protect your home and family.
Ventilation RequirementsVentilation requirements refer to whether the heater needs to be vented to the outside to expel combustion gases. This is important for maintaining indoor air quality and safety. Vent-free heaters are easier to install and can be used in rooms without external walls, but they must be used in well-ventilated areas. Vented heaters require a flue or chimney but are safer for long-term use in enclosed spaces. To pick the right one, consider the room's ventilation and your willingness to install venting if necessary.
Thermostat ControlThermostat control allows you to set and maintain a desired temperature, which is important for comfort and energy efficiency. Basic models may have manual controls, while more advanced heaters offer digital thermostats with programmable settings. To choose the right one, think about how much control you want over the temperature and whether you prefer the convenience of programmable settings for maintaining consistent warmth.
Size and PortabilityThe size and portability of a gas heater affect where and how you can use it. Compact, portable heaters are easy to move from room to room and are ideal for temporary heating needs. Larger, fixed heaters are better for permanent installations in specific areas. To pick the right one, consider whether you need a heater that can be easily relocated or if you prefer a more permanent solution for a particular space.

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