Comparison: Best Space Heater For 400 Sq Ft Room (Updated | Dec 16th)
When winter’s chill seeps through your windows, finding the perfect space heater for your 400 sq ft sanctuary becomes a top priority. You’re not just looking for warmth; you’re seeking comfort, efficiency, and peace of mind. We’ve done the legwork, testing and comparing top contenders to bring you the ultimate guide to cozy living. From whisper-quiet operation to energy-saving smart features, we’ll help you discover the heater that’ll transform your space into a warm haven without breaking the bank or compromising on safety.
Editor’s Choice
Best for a specific purpose
- Best for humidifying heat solution: Dr Infrared Heater DR-998
- Best for dual heating powerhouse: Dr Infrared Heater Portable Space Heater
- Best for 360° safe heating: Landeagle Space Heaters for Large Room
- Best for decorative flame heater: Uthfy 32″ Space Heater for Large Room
- Best for efficient panel heating: Ballu Convection Panel Heater
- Best for smart control comfort: Ballu Convection Panel Space Heater for Large Room
- Best for panoramic infrared warmth: Ballu Mica Infrared Space Heater Indoor Use
- Best for rapid quiet heating: Dreo Space Heater for Large Room
- Best for heavy-duty garage heater: Newair 5600W Portable Electric Garage Heater – Heats Up to 600 sq. ft. with 6-Foot Cord Wrap and Carrying Handle
- Best for silent wall heater: EconoHome Convection Wall Heater with Thermostat – 400W Electric Wall Mounted Space Heater Panel – Updated Model
Product Comparison: Best Space Heater For 400 Sq Ft Room
Humidifying Heat Solution
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
Dual Heating Powerhouse
Dr Infrared Heater Portable Space Heater, Original, 1500-Watt, Cherry (Pack of 1)
DR. INFRARED HEATER
- Can heat up a large room with Auto Energy Saving Model With High and Low Feature. Tip-over protection and Overheat protection.Heat Up for a large room – Dual Heating System: Infrared Quartz tube + PTC for 60% more heat than others. Rated around 5200 BTU.
- Dual Heating Systems featuring infrared quartz tube + PTC with 12-Hour automatic shut-off timer. Amperage: 12.5 Amps
- IR Remote Control, High Pressure Low Noise Blower with Noise level 39 dB super quiet. Heating can cover for a large room.
- Electronic Thermostat: range 50 to 85 degrees. Caster Wheels and Lifetime Filter
- Weights 24 lbs and uses 12.5 Amps of Power. 1500 Watts. Power Cord is 72-inch-long (6 Feet)
360° Safe Heating
Landeagle Space Heaters for Large Room, Whole-Room Heating, 1500 W Radiator Electric Heater with Tip-over & Overheat Protection, Heaters with Remote Control, 12H Timer for Indoor Office Use(26IN)
Landeagle
- 🔥【360° Whole-Room Heating | Large Space Optimized】 Powered by advanced mica heating technology, this radiator heater delivers 1500W of powerful, 99% efficient warmth. Its 360° surround heating ensures even heat distribution across spaces up to 400 sq ft—making it ideal for bedrooms, offices, and living rooms. Wherever you are, experience consistent, enveloping comfort
- 🔥【3-Mode Energy Optimization with ECO Control】 Choose from 1000W (energy-saving), 1500W (fast heating), or smart ECO mode. The programmable thermostat (50°F–95°F) adjusts in 1° increments to automatically minimize energy use while keeping your ideal comfort
- 🔥【Retractable Drying Rack & Skin-Friendly Humidification】 This portable heater features a built-in foldable towel warmer to keep clothes dry and cozy. Its humidification tank adds moisture to the air, helping prevent dry skin and nasal discomfort—even after long periods of use
- 🔥【Child & Pet Safe Certified Heater】 Enjoy total peace of mind with this indoor heater’s advanced safety features. It includes triple overheat protection, flame-resistant materials, tip-over switch, anti-burn plug, child lock, and 7-layer safety verification. UL and FCC certified for guaranteed safety
- 🔥【Silent, Wind-Free Heating with Multi-Control Options】 Experience ultra-quiet warmth with the Landeagle convection heater—no fan, no noise, and no harsh light. Easily control your comfort using the remote, touch panel, or 12-hour timer. Equipped with smooth-rolling wheels and a convenient handle for easy movement between rooms
- Attention：The product does not light up during operation. The heating effect shown is for design purposes only. Please refer to the images without the heating effect for accurate representation
Decorative Flame Heater
Uthfy 32″ Space Heater for Large Room, 1500W Electric Heater for Indoor Use with 24H Timer & 3D Flame, 120° Oscillation, ECO Mode, Child Lock, Remote, Portable Tower Heater for Room, Bedroom Office
Uthfy
- 🔥Rapid, Wide-Coverage Heating: Boasting a 32-inch height and 120° oscillating design, this space heater distributes warm air across large spaces—ideal for 400 Sq.ft rooms! Powered by PTC ceramic heating technology, the 1500W heater delivers instant warmth in just 1 seconds, quickly reaching your desired temperature without lengthy waits
- 🔥Stunning 3D Flame Effect: More than a heater—this 1500W electric heater doubles as a decorative centerpiece! Its lifelike 3D dancing flames create a cozy, inviting ambiance, blending functional heating with visual comfort that elevates any room decor, multifunctional gift for Christmas, or other festivals
- 🔥Energy-Saving and Cost-Effective: Customize your heating with 2 power modes (1500W high/1000W low) and a precise thermostat (50°F-99°F, 1°F increments). Instead of wasting energy on central heating, heat only the spaces you use—plus, the thermostat maintains a consistent temperature to slash electric bills
- 🔥Dual Control Modes and Portable Design: You can operate effortlessly via the top LED control panel or included remote—adjust power, heating modes, oscillation, temperature, 24-hour timer, flame settings, and screen on/off from your sofa or bed. The 24-hour timer and quiet 25 dB performance guarantees undisturbed comfort in sleeping,working or relaxing. Featuring a hidden handle and lightweight build, this portable heater is perfect for home, office, or any space needing targeted warmth
- 🔥Engineered for Safety: Designed for families with kids and pets, this room heater includes V0-grade flame-retardant materials, an enhanced safety plug, overheat protection, and tip-over shutoff. For extended durability, the indoor heater features a 30-second post-shutdown cooling to fully dissipate heat from the heating element
Efficient Panel Heating
Ballu Convection Panel Heater,1500W Space Heater for Large Room Indoor use with Programmable Thermostat,WiFi App Control,Smart Quiet,Works with Alexa,Black
Ballu
- Reliable Winter Warmth That Lasts: Enjoy a cozy home with the Ballu Space Heater, built with a patented Hedgehog Heating Element crafted from aerospace-grade aluminum and protected by an all-metal body. Engineered for long-term performance—tested to deliver warmth season after season. Backed by a 2-year warranty, your purchase is well supported for added peace of mind
- Quick Comfort,Lasting Warmth:With a 36% increase in air contact surface,this heater spreads warmth faster and more evenly.Enjoy heat in just 30 seconds,and experience a cozy environment as it can warm an entire room within 1–2 hours.Ideal for rooms up to 250 sq.ft as a primary heater,and providing supplemental warmth for areas over 500 sq.ft
- Ultimate Control for Large Rooms:Perfect for living rooms or master bedrooms, this heater gives you options—use the remote from the sofa, the sleek digital panel when passing by, or the app with Alexa for effortless voice control. Whether you’re relaxing, working, or getting ready for bed
- Up to 37% Energy Cost Saving:The Ballu Room Heater combines an exposed temperature sensor, adjustable thermostat,and a highly efficient all-aluminum heating element.These features help maintain consistent warmth while optimizing energy use,so you enjoy a comfortable home with smarter,more efficient heating
- Ultimate Comfort Experience: Say goodbye to noise,cold,and dryness.The Ballu Electric Heater quietly fills your space with gentle,consistent warmth—like being wrapped in a soft blanket on a winter night.Whether you’re relaxing,working,or drifting off to sleep,it creates a cozy and peaceful environment that keeps you comfortable all day long
- Enhanced Flexibility and Style:The Convection Panel Heater can be used freestanding with portable casters or easily wall-mounted with the included accessories—no tools required.Its versatile design makes it a perfect fit for bedrooms,offices,living rooms,and apartments,delivering warmth wherever you need it
- Perfect Safety for Your Family: Ballu space heaters for indoor use large room consists of an insulated alloy case, v0-rated flame-retardant power cord,and plug with multiple safety features,including built-in smart tip-over protection,overheat protection,and a 24-hour timer for added peace of mind
- 120 Volt
Smart Control Comfort
Ballu Convection Panel Space Heater for Large Room,1500W Electric Heater with Programmable Thermostat,WiFi App Control,Standing or Wall Mount,Smart Quiet Heater for Indoor Use,Works with Alexa,White
Ballu
- Reliable Winter Warmth That Lasts: Enjoy a cozy home with the Ballu Space Heater, built with a patented Hedgehog Heating Element crafted from aerospace-grade aluminum and protected by an all-metal body. Engineered for long-term performance—tested to deliver warmth season after season. Backed by a 2-year warranty, your purchase is well supported for added peace of mind
- Quick Comfort, Lasting Warmth:With a 36% increase in air contact surface,this heater spreads warmth faster and more evenly.Enjoy heat in just 30 seconds,and experience a cozy environment as it can warm an entire room within 1–2 hours.Ideal for rooms up to 250 sq.ft as a primary heater,and providing supplemental warmth for areas over 500 sq.ft
- Ultimate Control for Large Rooms: Perfect for living rooms or master bedrooms, this heater gives you options—use the remote from the sofa, the sleek digital panel when passing by, or the app with Alexa for effortless voice control. Whether you’re relaxing, working, or getting ready for bed
- Up to 37% Energy Cost Saving:The Ballu Room Heater combines an exposed temperature sensor, adjustable thermostat,and a highly efficient all-aluminum heating element.These features help maintain consistent warmth while optimizing energy use,so you enjoy a comfortable home with smarter,more efficient heating
- Ultimate Comfort Experience: Say goodbye to noise,cold,and dryness.The Ballu Electric Heater quietly fills your space with gentle,consistent warmth—like being wrapped in a soft blanket on a winter night.Whether you’re relaxing,working,or drifting off to sleep,it creates a cozy and peaceful environment that keeps you comfortable all day long
- Enhanced Flexibility and Style:The Convection Panel Heater can be used freestanding with portable casters or easily wall-mounted with the included accessories—no tools required.Its versatile design makes it a perfect fit for bedrooms,offices,living rooms,and apartments,delivering warmth wherever you need it
- Perfect Safety for Your Family: Ballu space heaters for indoor use large room consists of an insulated alloy case, v0-rated flame-retardant power cord,and plug with multiple safety features,including built-in smart tip-over protection,overheat protection,and a 24-hour timer for added peace of mind
- 120 Volt
Panoramic Infrared Warmth
Ballu Mica Infrared Space Heater Indoor Use,Large Room Panel Heater with Programmable Thermostat,WiFi App Control,Portable Stand or Wall Mount,Energy Efficient Smart Quiet Heater,Work with Alexa,White
Ballu
- Your Reliable Companion:Wrapped in a durable all-metal design,the Ballu Mica Infrared Heater uses premium mica panels to provide gentle,far-infrared warmth that lasts for decades.From chilly mornings to long winter nights,it’s the heater you can count on—reliable,long-lasting, and backed by a 2-year warranty
- 180°Panoramic Heating:Imagine stepping into a room where warmth flows in every direction.With 10-second heat-up and 180°wide coverage,this heater wraps your space in a blanket of even,soothing heat—from floor to ceiling,corner to corner
- Ultimate Control at Your Fingertips:Whether you’re working, relaxing,or winding down for the night,the Ballu heater makes it easy to stay comfortable in large spaces.Choose quick adjustments with the remote,precise settings on the digital panel,or smart scheduling and voice control via the app—a heating solution that truly fits your routine
- Up to 37% Energy Cost Saving:The Ballu Large Room Heater combines an exposed temperature sensor, adjustable thermostat,and a highly efficient all-aluminum heating element.These features help maintain consistent warmth while optimizing energy use,so you enjoy a comfortable home with smarter,more efficient heating
- Ultimate Comfort Experience:Enjoy whisper-quiet heating and gentle,even warmth that turns any room into a cozy retreat.The Ballu Heater helps minimize dryness while keeping comfort steady—perfect for focused work,movie nights,or peaceful sleep
- Enhanced Flexibility and Style:Adapt your comfort to any space with the Ballu Infrared Heater. Roll it from room to room on portable casters or mount it neatly on the wall—both options are fast and easy.Perfect for bedrooms,offices,living room,apartment,or greenhouses,it combines modern style with versatile heating
- Perfect Safety for Your Family:Safety meets warmth with this indoor heater,featuring an insulated metal case,flame-retardant cord,and a secure plug.Added protections—auto shut-off if tipped,overheat prevention,and a 24-hour timer—let you enjoy family time or a good night’s sleep with complete confidence
- 120 Volts
Rapid Quiet Heating
Dreo Space Heater for Large Room, 23 Inch Electric Heaters for Indoor Use, 8 Safe Protection Tower, 70° Oscillation, PTC Ceramic with Thermostat and Remote, Quiet, 12H Timer, Bedroom, Office
Dreo
- Twice the heat power: With dual DC motors, this DREO heater doubles airflow at 10ft/s, heats up in 2s, plus a 25% larger heating plate that efficiently warms rooms up to 250 sq.ft.
- Worry-free warmth: With child-lock, safety plug, overheat, tip-over protection and cool-touch housing, this ETL-listed electric heater provides safe, efficient warmth indoors.
- Energy-efficient heating: Save up to 40% on energy with ECO mode, along with precise temp control (41-95°F) in 1°F increments, 3 heat levels, and a fan mode for optimal comfort.
- Even heat distribution: Enjoy a cozy room with 70° wide oscillating, ensuring heat spreads to every corner for consistent warmth, making it perfect for large spaces on chilly days.
- Whisper-quiet comfort: At a mere 34db, this heater brings warmth to your large room without noise disruption. The 12hr timer offers convenience for effortless heating all day long.
Heavy-Duty Garage Heater
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.
Silent Wall Heater
EconoHome Convection Wall Heater with Thermostat – 400W Electric Wall Mounted Space Heater Panel – Updated Model, 120V – Heats Rooms up to 120 Sq Ft
EconoHome
- CONVECTOR HEATER SPECS: Ideal for a 120 sq. ft. room, 400 watts, 120 volts, 3.33 amps. Panel Heater Dimensions: 23.5 x 23.5 x ¼”. cETL approved. UL-2021 & RoHS compliant. HEAT REFLECTOR INCLUDED, temperature ranges between 41-86 °F. This unit may be HARD WIRED! OVERHEAT PROTECTION for your safety! We offer a 3 Year Manufacturer Warranty!
- SAFE AND EFFICIENT TECHNOLOGY: This convector space heater’s exterior casing will feel warm and is safe for adults only. The electric wall heater operates at a constant temperature and emits some radiant heat, but mostly releases convection currents that rise from behind the heating panel and circulates heated air around the room.
- UPDATED CRACK RESISTANT VERSION: This upgraded durable model is TRIPLE REINFORCED and made with a superior calcium silicate material. TRIPLE INSULATED for electrical safety. EASY TO MOUNT on any wall (Installation hardware Included). Enjoy the beautiful sleek PAINTABLE DESIGN which blends in with any décor.
- NO FAN and QUIET: Asthma and dust allergy sufferers can enjoy warmth without irritation since the air will not dry out, nor will dust circulate around the room. Perfect for all indoor rooms, including bathroom, bedrooms, office, garage, and RV.
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 type of space heater is best for a 400 sq ft room?
For a room of this size, you should look for a heater with a power output of at least 1,500 watts. Ceramic and infrared heaters are both excellent choices, offering efficient and rapid heating. Infrared models are particularly good for heating people and objects directly, while ceramic heaters warm the surrounding air effectively.
How important are safety features for a powerful space heater?
Safety features are critically important for any heater, especially powerful ones used in larger spaces. Always look for overheat protection, which automatically shuts the unit off if it gets too hot. A tip-over switch is also essential, instantly cutting power if the heater is accidentally knocked over.
What’s the difference between a ceramic heater and an infrared heater?
The main difference is how they transfer heat. Ceramic heaters use a fan to blow air over a hot ceramic element, warming the entire room’s air volume. Infrared heaters emit waves of heat that warm objects and people directly, similar to the sun, which can feel more immediate and is often better for drafty rooms.
Will a 1,500-watt heater be expensive to run in a large room?
Running costs depend on your local electricity rate and how long the heater runs. However, features like an adjustable thermostat, multiple heat settings, and a programmable timer can significantly improve efficiency and reduce energy consumption. Using these features to maintain a comfortable temperature rather than running it on high continuously will save you money.
Do I need a heater with a remote control and smart features?
While not essential, a remote control offers great convenience for adjusting settings from across the room. Smart features, like Wi-Fi connectivity and app control, allow you to schedule heating times and operate the heater remotely, which can boost energy savings. For daily ease of use, a remote is a valuable addition.
How do I know if a heater is powerful enough for my 400 sq ft room?
Look for the heater’s stated heating capacity in square feet, ensuring it covers at least 400 sq ft. Most heaters rated for this size will have a maximum output of 1,500 watts. Checking user reviews for people with similarly sized rooms can also provide real-world insight into its performance.
Is a noisy fan a problem with space heaters for large rooms?
This depends on the type of heater and your sensitivity to noise. Ceramic heaters, which use a fan to circulate heat, will produce some level of noise. Infrared heaters are typically silent since they don’t have a fan, making them a better choice for bedrooms or quiet spaces.
How does an oil-filled radiator compare for heating a large room?
Oil-filled radiators are excellent for providing steady, long-lasting, and quiet warmth in a 400 sq ft room. They take longer to heat up initially compared to ceramic or infrared models but retain heat very well, cycling on less frequently. This can make them more energy-efficient for maintaining a constant temperature over several hours.