Comparison: Best Space Heater For 400 Square Feet (Updated | Dec 16th)
Shivering in your own home? Finding the perfect space heater for a 400-square-foot room can feel like searching for a warm oasis in a frozen tundra. But fear not, cozy comfort seekers! We’ve done the legwork, testing and comparing the top contenders to bring you the ultimate guide to transforming your chilly space into a toasty haven. From energy efficiency to safety features, we’ll help you discover the ideal heater that’ll keep you snug without breaking the bank or cranking up the thermostat.
Editor’s Choice
Best for a specific purpose
- Best for humidifying infrared heat: Dr Infrared Heater DR-998
- Best for smart convection heating: Uthfy 1500W Space Heaters for Indoor Use
- Best for quiet ceramic comfort: FLANUR Space Heaters for Indoor Use Large Room
- Best for compact dual-function heater: Electactic Portable Ceramic Space Heater w/Thermostat
- Best for powerful garage heating: Newair 5600W Portable Electric Garage Heater – Heats Up to 600 sq. ft. with 6-Foot Cord Wrap and Carrying Handle
- Best for ceiling mount efficiency: Barphygo 4800W Electric Garage Heater
- Best for budget-friendly choice: GiveBest Portable Electric Space Heater with Thermostat
- Best for wall-mountable infrared: Heat Storm Phoenix HS-1500-PHX
- Best for oscillating warmth: 1500W Space Heater
- Best for compact infrared heater: Heat Storm Phoenix Infrared Space Heater with Attachable Feet
Product Comparison: Best Space Heater For 400 Square Feet
Humidifying Infrared Heat
Dr Infrared Heater DR-998, 1500W, Space Heater with Humidifier, Oscillation Fan & Remote Control (Cherry)
DR. INFRARED HEATER
- Can heat up a large room with Dual Heating System: Infrared Quartz tube + PTC. Tip-over protection and Overheat protection.Heating Coverage:400 sq.ft
- Built-in humidifier produces a cool mist to add much needed humidity to dry, winter air
- Oscillation function distributes warmth throughout your entire area evenly and faster.Can be operated as a fan with humidifier or without , good for summer time
- Electronic Thermostat: range 50 to 85 degrees. Uses water bottle instead of water tank. Lifetime filter can be removed easily and cleaned. Cannot harm children or pets. Filter can be cleaned with warm water or a vacuum once removed from the back of the unit
- The DR-998 Portable Infrared Space Heater is a 1500W portable heater featuring a dual-heating system with both infrared and ceramic heating elements inside. This heater comes with a Humidifier attachment as well as a remote for convenient use. The heater can be used with or without the humidifier, the humidifier can be run with or without the heating portion of the heater turned on, and the heater can also be run in fan-only mode. It comes with 4 durable caster wheels that allow the heater to move effortlessly from room to room.
- Mounting type: Free Standing
Smart Convection Heating
Uthfy 1500W Space Heaters for Indoor Use, 26 Inch Convection Electric Heater, 3 Sides Heating, 12H Timer, Temperature Adjustable 50-95°F, Tip-Over & Overheat Protection, Heaters for Large Room
Uthfy
- Efficient & Customizable Heating: Equipped with 3 heating modes — Low (1000W), High (1500W), and Eco — this electric convection heater allows flexible temperature adjustment from 50°F to 95°F. Efficiently covers 300-400sq.ft, perfect for living rooms, bedrooms, and garages, ensuring consistent and comfortable warmth in every corner
- Fast & Wide Heat Distribution: Featuring advanced mica heating technology and enlarged heating tubes, this heater achieves up to 99% electric-to-heat conversion efficiency, delivering stronger and faster warmth within just 2 seconds. With its three-sided heating design (front, rear, and top) and 180° wide heat flow, it provides broader coverage and better heating performance than ordinary heaters — ideal for large rooms and open spaces
- All-Round Safety Protection:Crafted with V0-grade flame-retardant materials and equipped with multiple safety features: overheat protection, tip-over auto shut-off, child lock, and timer function. Safe for families with kids or pets, allowing worry-free operation day and night.
- Smart Control & Quiet Comfort:Easily adjust settings via the included remote control or LED touch panel. The large digital display shows the real-time room temperature, and the screen-off option prevents light disturbance at night — perfect for quiet and comfortable sleep.
- Portable Design & Dual Functionality:Designed with 4 smooth-rolling wheels and dual carrying handles for easy movement between rooms. The handles double as towel racks to warm or dry clothes — bringing both warmth and convenience to your daily life.
Quiet Ceramic Comfort
FLANUR Space Heaters for Indoor Use Large Room, 1500W Portable Electric Heater with Remote, 5 Modes, Safety Protection & Child Lock, 12H Timer, Oscillation Heater for Bedroom Home Office Black 1Pack
FLANUR
- Powerful Heating Technology: Space heater office equipped with advanced PTC ceramic heating technology, this space heaters for indoor use large room delivers 1500W of robust power to efficiently warm up to 220 square feet, space heater large room offers an unparalleled warmth experience. This portable heater for office is the ideal indoor heating solution for offices or bedrooms.
- Multi Mode Heating: Space heaters for indoor use large room with three fan speed settings (H1/H2/H3), an energy-saving ECO mode, and a fan mode. This space heater office adapts to seasonal changes and diverse space needs, electric heaters for indoor use large room keep you warm year-round. The space heaters for indoor use large room has a 70 ° oscillation, which can bring warmth to every corner of the room.
- User-Friendly Design: Room heater office equipped with a remote control and adjustable timer (1-12 hours), the space heater large room operates at an ultra-quiet 23 dB at its lowest setting, making it perfect for quiet office or bedroom environments. The space heater office is equipped with an LED display screen, which can visually display the current temperature and facilitate real-time monitoring of equipment status.
- Safety First: Space heater for office engineered for ultimate security, this portable heater for bedroom incorporates multiple safeguards including automatic tip-over protection, 24h auto off, overheat protection, and a child lock to protect your family and pets. After turning off the space heaters for indoor use large room, there will be a 30s countdown on the display, and the fan will work to dissipate the remaining heat
- Enhanced Portability: Electric heaters indoor use large room featuring a rear handle for easy movement, this space heaters for indoor use large room large room adapts to diverse indoor settings. Whether transferring between rooms or storing during warmer seasons, room heaters for indoor use large room remains effortless to transport while maintaining efficient heating performance.
Compact Dual-Function Heater
Electactic Portable Ceramic Space Heater w/Thermostat, 1500W Indoor Electric Space Heater Fan with Overheat and Tip-Over Protection, Heat Up 200 Square Feet for Office Room Dorm Use, Black
Electactic
- 2-in-1 Ceramic Heater & Fan : Offers year-round comfort with two heating modes (1500W & 750W) for winter and a cool air fan for summer use. Equipped with a thermostat, the heater fan automatically turns off once the preset temperature is reached and reactivates when the room temperature drops below the set point. Easily adjust the thermostat between 41°F and 95°F to maintain your ideal room temperature effortlessly.
- Multi-Protection Safety System: Three built-in safety features ensure complete peace of mind. The ceramic space heater is constructed from flame-retardant materials to prevent fire hazards. It also features an automatic overheat shutoff and a tip-over switch that immediately cuts power if the unit is knocked over, with operation resuming once it’s placed upright.
- Compact, Portable & Cost-Effective：Enjoy targeted warmth exactly where you need it. This portable heater is your energy-efficient solution for spot heating—whether in your home office, bedroom, or any space where cranking up the central heat is unnecessary and costly.
- Quiet & 2s Rapid Heating: The noise of this electric heater fan makes is lower than 45 decibels, quiet enough for most people to use in a bedroom while sleeping. With PTC ceramic heating tech and high speed fan, this heater put out tons of heat to heat up 200 square feet in seconds
- Lightweight and Wide Applicability: Weighing below 3 lbs and sized at 6.85”L x 5.47W” x 9.65”H with easy to hold design, the desktop heater doesn’t take up space. On the table, at y our feet, and by the cabinet, or place it at study, bedroom, office, dorm, no matter where you are in the corner, it can quickly deliver a uniform warm current.
Powerful Garage Heating
Newair 5600W Portable Electric Garage Heater – Heats Up to 600 sq. ft. with 6-Foot Cord Wrap and Carrying Handle, Space Heater Ideal for Garage, Bedroom, Dorm, and Office
NewAir
- [POWERFUL FAN FORCED HEATING] – With 5,600 watts of heating power, this electric garage heater packs a punch. It’s strong enough to warm up to 600 square feet—perfect for a two-car garage or a 24×24 workshop or shed.
- [RUGGED EXTERIOR BUILT TO LAST] – Black powder coated finish protects against scratches and scuffs, making this sturdy steel-bodied heater perfect for garages, workshops and light industrial environments. Alarm-No
- [THERMOSTAT & AUTO-FAN TEMP CONTROL] – Set the temperature you want. Once the space has reached the ideal temperature, the fan will automatically kick-in as needed to keep your workshop warm. It’s that easy to get the heated working environment you need in winter.
- [PORTABILITY FEATURES FOR FAR-RANGING HEAT] – Take advantage of 2 portable features: the cord wrap and carry handle. Together they make it easy for you to position or move your heater to the most ideal place in your garage, workshop, or shed.
- [SAFETY FEATURES FOR PEACE OF MIND] – This UL-certified heater has an automatic shut-off function that prevents overheating. The outer construction stays cool after use to ensure safety for you and your space.
Ceiling Mount Efficiency
Barphygo 4800W Electric Garage Heater, 240V Ceiling Mount Shop Heater for Indoor use, Plug in Heaters with Remote, Fan-Forced Overheat Protection Space Heaters with 8 Hour Timer for Garage & Workshop
Barphygo
- 【Electric Garage Heater】This high efficiency heater for garage has a power of 4800 watts and maximum 16382 BTU. With fan-forced design and adjustable airflow angle, it quickly warms up to 400 square feet spaces for indoor use, providing fast and effective heating.
- 【Save Energy & Timer】The plug in garage heater is equipped with a built-in temperature sensor and thermostat, which allows it to adjust the heating power or stop heating based on the ambient temperature. The convenient timer feature (1-8 hours) ensures that the electric heater turns off automatically after work hours to save on energy.
- 【Overheat Protection Heater】Our ceiling mount heater for garage features a built-in thermostat that provides convenient and precise control over the temperature settings. You can adjust the temperature to suit your needs and preferences . A built-in sensor monitors the temperature and immediately shuts the shop heater down if it detects overheating.
- 【Safe & Sturdy Structure】This 240v industrial heaters is made of heavy-duty steel material and durable heating elements for long life. The durable steel construction ensures reliable performance even in environments with temperature fluctuations. Also, the electric heater for garage is ETL certified to ensure your safe use.It’s perfectly suited for a variety of large indoor room spaces including warehouses, fitness centers, greenhouses,work shops, garages, industrial facilities and more.
- 【Convenient Operation】This Heater for garage comes with a remote control and LED touch screen display so you can adjust it from a distance, allows to personalize the heating experience without interrupting your activities. The space heater must be grounded and hardwired to a properly sized current protection circuit breaker in accordance with the (US) National Electric Code. Recommending hire a professional electrician to install it. (Note: This heater does not come with a power cord)
Budget-Friendly Choice
GiveBest Portable Electric Space Heater with Thermostat, 1500W/750W Safe and Quiet Ceramic Heater Fan, Heat Up 200 Square Feet for Office Room Desk Indoor Use, Silver
GiveBest
- 2 in 1 heater fan: This ceramic heater provides two heat levels, 1500W or 750W and one cool air fan, you can use it both for winter and summer. Thermostat control of the heater will turn the heater off when it reaches a preset temperature and turn the heater back on when the temperature dips below the thermostat setting. It will cycle on and off. Adjust the setting of thermostat from 41℉ to 95℉ to keep room comfortable
- Multi protection safety system: These heaters are made of flame retardant material avoiding any fire hazard. Automatic safety shutoff system will shut the heater off when the heater overheat. The tip over protection system will also shut the heater off when the heater was knocked over by accident and it will come back on automatically if it is up righted
- Compact and powerful: The mini heater with build in carry handle helps to reinforce the potential of rather low electrical bills by using at the place where you need when you don’t want to warm the full house with other centralized heaters
- Quiet and fast heating: The noise this ceramic heater makes is lower than 45 decibels, quiet enough for most people to use in a bedroom while sleeping. With PTC ceramic heating tech and high speed fan, this heater put out tons of heat to heat up 200 square feet in seconds
- Upgrade abs material: Upgrade abs material applied, which is more flame resident. The room heater with six feet lead cord and 2 prong connection has a long lasting life
Wall-Mountable Infrared
Heat Storm Phoenix HS-1500-PHX, Infrared Space Heater with Attachable Feet, Remote Control, Energy Efficient-750-1500 Watts, Gray Floor or Wall
Heat Storm
- This portable 1500 watt infrared heater has the power to heat up a small room or office with its 5200 BTU heat output. Two power modes, one uses the full 1,500 watt power while the other only uses 750 watts.
- Our patented heat exchanger with HMS Technology combines with humidity in the room to provide soft, safe heat without reducing oxygen or humidity. Safe to touch, even the grill.
- Small convenient size makes this perfect for any room in the house. Hang it on the wall or set it on the ground thanks to removable feet and wall mounting points on the back of the heater.
- Built in thermostat with LED display shows you what the ambient temperature is and helps regulate the temperature efficiently. Included remote control allows you to control the temperature with ease.
- This heater comes with a 1 year manufacturer warranty
Oscillating Warmth
1500W Space Heater, Portable Electric Heater Heat Up 200 Square Feet for Indoor Use Office Garage, Rapid PTC Ceramic Heating with Remote, Digital Thermostat, 24H Timer, Multiple Safety Protection
Pereysi
- Fast Advanced Heating: With faster heating PTC ceramic and high-speed fan, this space heater delivers comfort all across the room. Never fall short on heating power. This 1500W electric heater puts out lots of warmth
- Heating for Everyone: The 60° wide-angle oscillation provides more effective warm airflow distribution around your room. This oscillating heater is designed to maximize warmth coverage. There is a timer that can be set in one-hour increments from 1 to 24 hours.
- Usage Comfort: It’s fully operational with the included remote. Easily turn it on and change the settings you need without halting work and getting up from desk. Electric space heater features a sleek and modern design with a slot on the back to fit your hand for easy portability.
- Smart ECO-Energy Saving: The auto mode emits enough heat at 79 degrees. Smart ECO function on this ceramic portable heater helps save money on the electric bill. Warms up a room fast and has multiple settings to fit everyone’s needs.
- Below Whispering Quiet: Tower heater warms room well and is not too noisy. The quiet heater with an overheating system protects heating element safely, so it’s not scary to use in the bedroom.
Compact Infrared Heater
Heat Storm Phoenix Infrared Space Heater with Attachable Feet, Remote Control, Energy Efficient-750-1500 Watts, White Floor or Wall – HS-1500-PHX
Heat Storm
- This portable 1500 watt infrared heater has the power to heat up a small room or office with its 5200 BTU heat output. Two power modes, one uses the full 1,500 watt power while the other only uses 750 watts.
- Our patented heat exchanger with HMS Technology combines with humidity in the room to provide soft, safe heat without reducing oxygen or humidity. Safe to touch, even the grill.
- Small convenient size makes this perfect for any room in the house. Hang it on the wall or set it on the ground thanks to removable feet and wall mounting points on the back of the heater.
- Built in thermostat with LED display shows you what the ambient temperature is and helps regulate the temperature efficiently. Included remote control allows you to control the temperature with ease.
- This heater comes with a 1 year manufacturer warranty
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Buying Guide
FAQs
What wattage heater is best for a 400 sq ft room?
For a 400 sq ft space, you should look for a heater with a maximum output of 1500 watts, which is the standard for most plug-in models. The key is not just wattage, but also the heater’s ability to circulate air effectively. Models with a fan or an oscillating feature will distribute heat more evenly throughout the room.
What are the main differences between ceramic, infrared, and oil-filled heaters?
Ceramic heaters use a fan to blow air over a hot ceramic plate, providing quick, directional warmth. Infrared heaters radiate heat that warms objects and people directly, similar to the sun, making them ideal for quiet, targeted heating. Oil-filled heaters are silent and provide long-lasting, even radiant heat, but they take longer to warm up and are heavier.
What safety features are most important when choosing a space heater?
The most critical safety features are overheat protection, which automatically shuts the unit off if it gets too hot, and a tip-over switch that turns it off if it’s knocked over. A cool-to-the-touch exterior is also essential, especially in homes with children or pets. Always ensure the heater is certified by a recognized testing laboratory like UL or ETL.
How much does it cost to run a 1500-watt space heater?
The cost depends on your local electricity rate, but a 1500-watt heater running for one hour consumes 1.5 kWh of energy. At a rate of $0.15 per kWh, it would cost about $0.22 per hour to operate. Using a heater with an adjustable thermostat and energy-saving modes can help reduce overall running costs.
Are space heaters with digital thermostats and timers worth the extra cost?
Yes, these features often provide significant value and convenience. A digital thermostat allows you to set a precise temperature, preventing the room from becoming overly warm and saving energy. A timer lets you program the heater to turn on or off automatically, ensuring you only heat the room when you need to.
Is it better to get a heater with a fan or one that is silent?
The best choice depends on your personal preference and where you plan to use the heater. A fan-forced heater will heat a room faster and more evenly but produces some noise. A silent, radiant-style heater like an oil-filled or infrared model is better for bedrooms or quiet spaces, though it may take longer to raise the ambient temperature of the whole room.
How do I determine if a heater is truly energy-efficient?
All electric space heaters are 100% efficient at converting electricity into heat, so energy efficiency comes from how you use it. Look for features like programmable thermostats, multiple heat settings, and timers that help you manage energy consumption. An eco-mode that automatically adjusts power to maintain a set temperature is also a great feature for saving energy.