10 Best Gas Heaters For Indoor Use 2026 in the United States

This Mr. Heater 30,000 BTU vent-free radiant heater is designed to heat spaces up to 1,000 square feet, making it a good choice for medium-sized rooms like living areas, home offices, or garages. It works with both propane and natural gas, offering flexibility depending on your gas source. The heater doesn’t require electricity to run, thanks to a battery-operated ignition system, which is handy during power outages or in places without power access. Safety is addressed with a low oxygen shut-off system that helps prevent unsafe conditions indoors, and it doesn't need any outdoor venting, which simplifies installation.

The built-in adjustable thermostat lets you control the temperature more easily, adding to comfort and energy efficiency. However, it has only one heat speed and no included blower fan, which means heat distribution relies primarily on radiant warmth and natural airflow; you can buy a fan kit separately if you want more even heat spread. In terms of size, it’s fairly compact and portable enough for different indoor setups, but being a pedestal form factor means it may take up some floor space.

This heater is well suited for users looking for a reliable and straightforward indoor gas heater without complex installation or electrical dependency. It provides good safety features and consistent heating but might not meet needs for multi-speed heat or quieter, fan-driven warmth. The white color and decent size help it blend in most rooms, while its dual-fuel capability adds convenience. It covers moderate space and comes with a standard 1-year warranty.

The ProCom ML300TBA-B is a propane-fueled, ventless blue flame heater that delivers up to 28,000 BTUs, making it suitable for heating rooms around 1400 square feet such as bedrooms, offices, or living rooms. Its compact and slim design allows it to be mounted on a wall or placed on the floor using the included base feet, offering flexibility with installation and placement. One strong point is its built-in thermostat with three heat settings (High, Medium, Low), which helps maintain a comfortable temperature without wasting fuel.

Since it doesn't require electricity, it can keep you warm during power outages, which is a handy feature for emergency situations. Safety is well addressed with an oxygen depletion sensor that shuts the heater off automatically if oxygen levels drop, reducing risks related to carbon monoxide. However, being a ventless heater, it relies on proper ventilation in the room, so it's important to ensure fresh air circulation to avoid stuffiness or potential buildup of gases.

The heater weighs about 29 pounds, which is manageable but not very portable for frequent moving. This model is a practical choice for those wanting an efficient and safe propane heater for indoor use, especially in spaces where running electrical heaters might not be ideal.

The ProCom Natural Gas Ventless Infrared Plaque Heater offers a strong heating capacity of 30,000 BTU, capable of warming up to 1,400 square feet, making it suitable for spaces like bedrooms, home offices, or living rooms. It uses natural gas, which is common and cost-effective for indoor heating. One of its key strengths is safety: it includes an oxygen depletion sensor (ODS) that shuts the heater off if oxygen levels drop too low, helping prevent carbon monoxide risks. This model does not require electricity, which is handy during power outages. The thermostat control with three heat settings (High/Medium/Low) allows you to adjust the warmth to your comfort.

It can be mounted on a wall or placed on the floor using included base feet, with a slim and modern design that fits well in most rooms. However, as a ventless heater, it requires proper room ventilation to ensure safety and optimal performance, so it isn’t ideal for very small or poorly ventilated areas. The heater weighs about 34 pounds, so while it’s portable enough for moving between rooms, it’s not extremely lightweight.

This unit provides a dependable and stylish choice for those needing supplemental heat in medium-sized indoor spaces, featuring good safety features and convenience for natural gas users. Be sure your room has adequate ventilation and you follow all safety guidelines when using it.