The 16 best wall-mounted outdoor fireplaces of 2025

Attractive and Practical Design: 3.86"D x 60"W x 18.11"H,The thickness of the new style is only 3.86 inches while the old one is 6 inches. And it operates the same as the old one. Also we redesign the location of main power and power cable, which makes the new fireplace more attractive and practical.

Multi Operation Modes: Touch screen and remote control;12 flame & LED flame bed color modes;5 flame speed modes;5 flame brightness levels; Specially automatic flame design(the flame color and brightness changed

Energy Saving: 750W & 1500W modes can be adjusted accordingly for both warm and energy saving purpose. The supplemental zone heating is for up to 400 square feet.

Safety and Comfort: ETL Certificate Approved. It also has auto-heat kill safety to avoid the superheating. The heat is good for maintaining the natural humidity within the air without making the room too dry.

Let R.W.FLAME electric fireplace warm your home and life.

APPEARANCE: The Sideline electric fireplace is designed for recessed in-wall mounting. Creating a cozy atmosphere of a traditional fireplace, this electronic fireplace has realistic flames with a real fire look. The Sideline’s 5 flame settings radiate a soft ember glow up to an intense blaze. Sideline gives you the total package. Control the heat and flame with the remote control. Designed to use one log or crystal, if you prefer you can mix both safely.

INSTALLATION: This Sideline installs simply and can safely be attached to framing studs. The sides & back of the unit remain cool to the touch with the heat feature on. Recommended minimum of 8” of space between the top of the fireplace and your TV, mantel, picture ceiling. The Sideline can be installed in existing fireplace openings safely. Consult with a licensed professional to ensure your unused gas lines and vents are secured properly. The Sideline fireplace is ventless.

OPERATION: The Sideline’s heater will take the edge off a cool room or basement, and it can be run with no heat (just flames) in warmer climates. The Sideline comes with a 6-foot power cord for a 110-120V outlet. It is also hard-wire ready for in-wall install. The unit draws a max of 12 amps, so the fireplace can be used on a 15-amp circuit. A 20-amp circuit may be necessary, depending on the use of other electronics on that same electric circuit.

FEATURES: The Sideline features an unmatched flame. Friends will be nervous to touch realistic flame behind the glass. The Sideline includes faux-fire logs & crystals to create an authentic feel, as well as an IR remote controlling flame color & intensity, the heater and shut-off timer. Front facing heater vents allow you to position the Sideline just 8” under a flat screen TV. The Sideline can be hardwired or plugged in to your electric source.

WHAT YOU NEED TO KNOW: 1. We recommend 8 inches of space between your fireplace & TV. 2. The Sideline pulls a max of 12 amps. 3. The fireplace includes a wall-mount bracket, if you don’t recess it. 4. You can install the Sideline in an existing fireplace opening. It stays cool to the touch on the sides & back and is ventless. You can use the Sideline with just the flame and no heat. 5. The heater will help to warm up a cool room but won’t replace a primary heat source.

ALEXA/WIFI ENABLED: Control the Sideline 50 Electric Fireplace from your lounge chair using the included remote control, Alexa or Google Home device or Smart mobile app. Connect it to compatible smart home devices through the app for added convenience. Discover more about setting up the WiFi features. The wireless remote control requires AAA batteries (not included).

MEASURE TWICE, BUY ONCE: We want your fireplace upgrade to be smooth and stress-free! Take a few extra moments to measure the height, width, and depth of your fireplace opening before ordering. A quick double-check ensures the perfect fit for a seamless installation. Don't be afraid to reach out if you have questions!

OUTDOOR USE WITH GFI PLUG - The Outdoor Sideline is built for outdoor placement, so its got a built in ground fault plug, is water resistant, and is wall mountable. It can be hung on outer walls of siding, brick, stucco or stone. (Please not you should make sure you have any specialty hanging screws or mounts required for hard surfaces.) Please note this unit has no heater.

50 INCHES WIDE - The Outdoor/Indoor Sideline Electric Fireplace has a 50 inch wide design, so its ready to fill the wall of your long patio wall or large outer wall. Its not going to get lost in your outdoor patio or porch.

DECORATIVE SLIM DESIGN - This model does not offer heat, so it for outdoor decorative purposes, but includes everything our customers love within the Sidelines design.

REALISTIC FLAME - The Outdoor/Indoor Sideline has 3 different flame color settings, and 5 flame levels. So with the blue, orange/red and combined flame, you get 15 potential flame settings.

FOR PORCH OR POOLSIDE - At Touchstone we pay attention to our clients, and we develop products around what they look for in a fireplace. This model is exactly that.

MEASURE TWICE, BUY ONCE: We want your fireplace upgrade to be smooth and stress-free! Take a few extra moments to measure the height, width, and depth of your fireplace opening before ordering. A quick double-check ensures the perfect fit for a seamless installation. Don't be afraid to reach out if you have questions!

Recessed or Wall Mount: Transform your room with this versatile and stylish 72 inch fireplace. You can either recess this electric fireplace into the wall or mount it on the wall, choosing the installation that suits your home's style. Enjoy the cozy ambiance of a realistic flame display in any setting. This fireplace is not only suitable for your home but also for commercial and office use

Customizable LED Fireplace: You can choose from 12 flame colors, 12 flame bed colors, 5 flame speed modes, and 5 flame brightness levels using the provided remote control or touch screen operation. Let this fireplace add ambiance and feeling to your home with its mesmerizing flames. Whether you want a warm, relaxing glow or a vibrant, lively display, you can achieve it with this fireplace

Efficient & Slim Design: You can choose the temperature you want from two modes: 750W or 1500W. This fireplace is only 3.2 inches thick, which means it won’t take up much space in your room. It is 20% thinner than other fireplaces, making it easy to install and use. This fireplace will help you save money and space while enhancing your comfort and style

Enjoy Warmth and Safety: This electric fireplace has been approved by ETL, which means it meets the highest standards of safety and quality. It also has a built-in auto-heat kill feature that prevents overheating. This fireplace keeps the air humid and cozy so that you can enjoy the comfort of this fireplace without any worries

Worry-free Purchased: You can rest assured that you are getting a high-quality product. If you have any questions or concerns, our professional customer service team is always ready to help. Order now and treat yourself and your loved ones to a warm and wonderful gift. You won’t regret it

Wall-Mounted & Recessed: 46.8"W x 3.7" D x 17"H, this 50 inches wide electric fireplace insert for wall-mounted & recessed. This elegantly designed black tempered glass electric fireplace adds an ideal touch of modern style and comfort to your home

Update Lights Design & Multi-Operating Modes: The light of the crystal stone and the light of the flame can be adjusted separately and settings to suit your desired ambiance (Flame with 12 changeable led color) ; Touch screen and remote control; the flame can be operated with or without heat for 4-season enjoyment

Energy Saving: 750 W or 1500 W heating power, Temperature setting from 62 °F to 82 °F, the supplemental zone heating is for up to 400 square feet. This LED flame technology requires less energy instead of natural gas and features a timer for auto-shutoff and can be set up to 8 hours

Safety & Comfort: ETL Certificate Approved. It also has auto-heat kill safety to avoid overheating. The heat is good for maintaining the natural humidity within the air without making the room too dry

Note: The heater will warm up a cool room but won’t replace a primary heat source. Keep combustible materials, such as furniture, pillows, bedding, papers, clothes, and curtains at least 3 feet (0.9 m) from the front of the heater, and keep them away from the sides and rear

Powerful 1500/750W Heating: With an impressive 5100 BTU of heat output, it envelops your entire room in cozy comfort. Effortlessly adjust the temperature to your ideal setting, ranging from 59°F to 95°F, ensuring the perfect atmosphere for any occasion. The flexible 750W and 1500W heating modes allow you to easily switch between a gentle warmth and an extra boost. Let this electric fireplace create a welcoming indoor retreat, keeping you snug and comfortable through every chilly night.

169 Color Options: Experience the unique ambiance of this electric fireplace heater, which not only simulates realistic flames but also offers an impressive 13 flame and 13 carbon colors. The exciting color cycle mode changes the flame and carbon colors every 3s, adding endless vibrancy to your space. You can also choose to illuminate the flames and carbon separately, with 5 brightness levels and 5 speed settings available to effortlessly customize your ideal flame effect.

User-friendly Experience: Controlling this electric fireplace inserts is effortless. Relax on the sofa and easily adjust the flame color, brightness, ember bed color, and temperature with a button or the included remote. The timer function lets you set it for 1 to 12 hours. With a noise level under 40 decibels, it ensures a quiet environment that won’t disrupt your rest. Plus, the child lock provides peace of mind while you enjoy the warmth and comfort of your home.

3 Installation Methods: Our slim electric fireplace offers three installation methods—recessed, wall-mounted, or freestanding. With a sleek thickness of just 3.9 inches, it fits perfectly in any living room, bedroom, or even on a table. Base legs are included for added convenience.

Unique Sleep&Recreation Mode: These two modes are exclusively available via remote control. Sleep Mode features the slowest flame speed and dimmest light, creating a calming atmosphere for restful nights. Recreation Mode, on the other hand, offers the fastest flame speed and brightest light, with colors of the flames and ember bed changing automatically. Both modes cater to your different needs, enhancing your experience whether you’re winding down or enjoying time with friends.

【Size Guide and Design】：This series of electric fireplaces have a total of five sizes. The size you are looking for right now is 60 inches. This fireplace’s length is 60 inches, the wide is 3.85 inches, the height is 18.11 inches and the weight is 47.39 LB. The whole machine adopts an integrated body, and the material of the body is made of sturdy metal.

【Realistic Flame】: We hired an excellent design team. We have been revising the design of our products in recent years. High Intensity LED lights with large display allows the flame to "burn" high enough, flames emerge slowly from the "source" and then get pulled to the top of the fireplace where they flash in the heat of the top of the fireplace. Customers can change the color of the crystal and the flame according to their own preferences and there are a total of 12 matching.

【Flexible Control Modes】: Remote and touch screen make it more convenient to control every function of electric fireplace,power switch,1-8 hours timer control,independent switch of heating and flame,adjustable flame color and speed,sleep mode function. The top independent physical switch design has passed ETL security certification.

【Safety and Energy Saving】: Our fireplace has 750W & 1500W two modes can be adjusted accordingly for both warm and energy saving purpose. The supplemental zone heating is for up to 400 square feet. We have ETL Certificate. It also has auto-heat kill safety to avoid the overheating. The heat is good for maintaining the natural humidity within the air without making the room too dry.

【High quality】: We only make high-quality fireplace products, which are of moderate price and you can use it everywhere, such as sitting room and bedroom. Maybe you only spend a little more, but it does bring you a real improvement in the quality of life.

Multiple Install Methods- This electric fireplace not only can be Recessed or semi recessed in wall but also can be Wall Mounted, This 36-inch-wide electric fireplace only weighs 33 pounds, so one person can easily hang it on the wall using the step-by-step instructions provided. Once it has been mounted to your wall, all you need to do is hang and secure your fireplace with the drywall screws. Overall dimensions: 36” x 3.86” x 18.11”

Realistic Flame Effects- Ultra High Intensity Led lights with large display allows the flame to "burn" high enough, flames emerge slowly from the "source" and then get pulled to the top of the fireplace where they flash in the heat of the top of the fireplace.12-color flame and crystal combination change creat an incredibly realistic & colorful effects (The colors range from traditional red to a modern blue, purple or pink)

THERMOSTAT and ENERGY SAVINGS- Front heater blower, 750W & 1500W modes can be adjusted accordingly for both warm and energy saving purpose. The supplemental zone heating is for up to 400 square feet.The heating level can be adjusted according to the your preference, making this fireplace a functional electric heater or a practical decorative no heat fireplace. You can turn it all up in freezing winter to keep you snug and warm.

Flexible Control Modes- Remote and touch screen make it more convenient to control every function of electric fireplace,power switch,1-8 hours timer control,independent switch of heating and flame,adjustable flame color and speed,sleep mode function.

Safe to Use and Pollution-free: Our product is CETL certified and equipped with safety cut-off device for overheat protection.

OPERATION: The Sideline Elite Outdoor Electric Fireplace offers multiple ways to operate it—use the remote control or smartphone app. With 6 flame colors, 10 ember bed options, adjustable flame speed and intensity, and a timer up to 8 hours, you can completely tailor your fire ambiance to match your mood or occasion.

INSTALLATION: Designed for simple installation outdoors, this fireplace plugs into a standard 110v–120v outlet and requires no chimney or venting. It can be mounted directly onto a wall or recessed. The weatherproof construction and GFI plug make it safe for outdoor use.

REALISTIC FLAMES: The Sideline Elite features lifelike flame visuals with adjustable speed and brightness, delivering an elegant glow that enhances any outdoor space. With 6 flame color options and 10 media bed colors, you can create up to 60 unique flame and ember combinations. The included log set, crystals, and driftwood add even more depth and customization, letting you craft the perfect fire look for any occasion.

SMART FIREPLACE: The Sideline Elite Outdoor model is Wi-Fi enabled and compatible with Amazon Alexa and Google Home, allowing you to control your fireplace using just your voice. Easily turn the fireplace on or off, adjust flame colors, speeds, and brightness, or set timers using your preferred smart home assistant or the app.

NO HEATER: This electric fireplace features a weatherproof, heater-free design that makes it ideal for year-round outdoor enjoyment. Since there's no heat output, it’s safe to install near electronics, under TVs, or in warm climates where heating isn’t needed. Enjoy a cozy, smoke-free flame display in patios, decks, or covered outdoor spaces—without the worry of open flames or heat restrictions.

MEASURE TWICE, BUY ONCE: We want your fireplace upgrade to be smooth and stress-free! Take a few extra moments to measure the height, width, and depth of your fireplace opening before ordering. A quick double-check ensures the perfect fit for a seamless installation. Don't be afraid to reach out if you have questions!

WELL MADE & NICE HOME DECORATING : Slim design with sturdy sturcture and flat tempered glass front panel, betelnut electric fireplace adds pretty realistic flames and awesome heat out put to any room. A bit more homey and interesting to your room, it is the excellent choice, whether you want it for aesthetic or heat purposes.

FUN FEATURES : The multiple combinations of colors, flame speed and dimmer controls offer so many options to really set the ambiance. It comes with crystal and carbon log rocks to meet your requirement. With the 12 static colors or color cycling, the flame and rocks look so great and pretty.

WARM & INVITING : The heat comes out the middle of the upper part of the front, which concentrate more heat and make it warmer; Temperature settings from 62°F to 82°F and timer from 1H to 8H adjustable; It puts out enough heat and makes the room so cozy, SUITABLE FOR ABOUT 400 SQ FT SPACE.

USER-FRIENDLY : Wall mounted and recessed installation type based on your needs; Easy to opertate by the led touch screen and remote controlled; Clear digital display; With safe cut-off device; Low noise with 45 db; Energy saving and ETL certificated.

SPECIFICATION : Dimension 50"L*17"W*4"D, 750W/1500W Heat setting; Package include -1x electric fireplace, 1x carbon log, 1 pack crystal stone, 1x installation manual and hardware accessories.

Brightness and Flame Variety: The VISVEIL Electric Fireplace offers five adjustable brightness levels, complete with 12 types of realistic log flames and 12 types of crystal flames. Whether it's in the living room, bedroom, or basement, you can easily adjust the settings to create your ideal ambiance

VISVEIL Electric Fireplace Heater: Equipped with a power range of 750-1500W and a 1-8 hour timer function. The temperature is adjustable between 62°F to 82°F, ensuring warmth, whether it's in the early morning or late night, accompanying you through the cold winter months

Multi-functional and Safe: The high-quality VISVEIL Electric Fireplace adopts dual operation modes with its touch screen and remote control, offering convenience at your fingertips. It's ETL-certified, guaranteeing safety for you, your family, and even when hosting Christmas gatherings

Easy Installation: We offer various installation methods, including wall-mounted, built-in, and free-standing, to cater to different needs. The product comes with a clear instruction manual, and with simple steps, you can complete the entire installation within an hour.Then, sit back with your loved one and enjoy the lifelike flames

Specifications and Accessories: The product measures 60"L x 4"W x 17"D. Included in the package are a electric fireplace, a set of carbon logs, a pack of crystal stones, an installation manual, and all necessary hardware accessories

Package Inclusions & 2-Year Technical Support: : The EUHOMY electric fireplace is equipped with 1* carbon log, 1* pack crystal stone, 1* installation manual and hardware accessories. ETL Certificate Approved. And the wall mount fireplace electric comes with 2 years of technical support. If you have any questions about our fireplaces, please contact EUHOMY and we will help you as soon as possible

Multiple Installation Options & Sleek Design: This electric wall fireplace features a black tempered glass front panel that enhances the brightness and brilliance of the flames, adding a warm and inviting touch to your room. Our electric fireplace heater can be fully recessed or wall-mounted, seamlessly blending with a variety of home décor styles. It is suitable for living rooms, bedrooms, dining rooms, offices, home theaters, and even RVs. Overall dimensions: 50” x 4.13” x 17.01”

Adjustable Flame Color & Rate: This electric fireplace inserts into wall features a sleek design paired with stunning flame effects. You can mix and match from 12 flame colors and 12 LED fuel bed colors, along with 5 independently adjustable flame brightness. The high-intensity LED lights on the large display create realistic flame visuals, and the electric fire place can operate with or without heat, allowing you to enjoy a cozy ambiance in any season

Timer & Energy Saving: This fireplace electric insert has a 750W energy-saving mode and a 1500W efficient heating mode. You can switch between them as needed. Our wall mounted fireplace has an adjustable temperature range of 62°F to 82°F, a 1-8 hour timer control and an automatic heat-off safety feature, allowing you to easily customize the warmth for your ideal comfort. Supplemental zone heating up to 400 square feet with this chimenea eléctrica

Dual Control & Quiet Operation: Equipped with both a remote control and a touchscreen, this wall fireplace electric with remote control lets you easily choose the features you need. The wall mounted electric fireplace heater operates at a noise level as low as 45 dB, and the sleep mode feature ensures you can relax and enjoy the cozy atmosphere without disturbance

𝗠𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝗶𝗻𝘀𝘁𝗮𝗹𝗹𝗮𝘁𝗶𝗼𝗻 𝗼𝗽𝘁𝗶𝗼𝗻𝘀: This electric wall fireplace offers two installation options, wall-mounted and embedded, allowing you to choose freely according to your needs and space style. Its 3.94" ultra-thin size ensures it won't take up too much space and can easily blend into any environment without being obtrusive. We also provide detailed installation instructions and reference videos to ensure quick and convenient installation

𝗘𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝘁 𝗵𝗲𝗮𝘁𝗶𝗻𝗴 & 𝗰𝘂𝘀𝘁𝗼𝗺𝗶𝘇𝗮𝗯𝗹𝗲 𝘁𝗲𝗺𝗽𝗲𝗿𝗮𝘁𝘂𝗿𝗲: This electric wall fireplace has a wider temperature adjustment range, allowing you to define the perfect temperature for your space between 60℉-99℉，when you set the temperature to 99℉, the electric fireplace will activate continuous heating mode. Its 5000BTU heat output can provide auxiliary heating for an area of 400 square feet. The two heating modes, 750W and 1500W, can be freely switched, providing you with a flexible and comfortable experience whether you need a cozy atmosphere or extra warmth

𝗨𝘀𝗲𝗿-𝗳𝗿𝗶𝗲𝗻𝗱𝗹𝘆 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲: Controlling this electric wall fireplace is easy. You can touch the button or use the included remote control while sitting on the sofa to easily adjust the flame color and brightness, fire bed color, and temperature. The timer function allows you to precisely set the usage time within 1-12 hours. You can even enjoy the unique atmosphere created by the flame without heating

𝗦𝘁𝗿𝗼𝗻𝗴 𝗱𝗲𝗰𝗼𝗿𝗮𝘁𝗶𝘃𝗲 𝗮𝗻𝗱 𝘃𝗲𝗿𝘀𝗮𝘁𝗶𝗹𝗲: This electric wall fireplace features an exquisite metal frame and stylish black tempered glass panel, with a fashionable design. It has 12 flame and 12 fire bed colors to choose from, adding a touch of elegance to any space.In addition, we are giving away a free bag of crystal stones for decoration. The realistic flame effect combined with the crystal clear stones creates an unparalleled sensory experience. It is suitable for living rooms, bedrooms, dining rooms, offices, home theaters, and even RVs

𝗦𝗮𝗳𝗲 𝗮𝗻𝗱 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲: This electric wall fireplace is CSA certified and equipped with overheat protection, which automatically cuts off the device when the temperature is too high, ensuring safe and reliable operation. You can also activate the child lock function after completing all settings to effectively prevent children or pets from accidentally operating it

Overall dimension: 44.1”W x 16.5”H x 8.5”D, flame area: 25.6”W x 8.1”H x 4.8”D.

All in one piece, no complex installation required. Only to mount it on the wall.

3 flame colors, 13 ambient light colors with one cycle setting.

Panoramic 3 sided, better view of the log with the flame rising from.

Temperature set from 60° - 82℉, warmth for up to 400 sq. ft. used with or without the flames. Timer and week timer added for easy use.

120V plugged. Safe to mount a TV above it.

APPEARANCE: The Sideline electric fireplace is designed for recessed in-wall mounting. Creating a cozy atmosphere of a traditional fireplace, this electronic fireplace has realistic flames with a real fire look. The Sideline’s 5 flame settings radiate a soft ember glow up to an intense blaze. Sideline gives you the total package. Control the heat and flame with the remote control. Designed to use one log or crystal, if you prefer you can mix both safely.

INSTALLATION: This Sideline installs simply and can safely be attached to framing studs. The sides & back of the unit remain with the heat feature on. Recommended minimum of 8” of space between the top of the fireplace and your TV, mantel, picture ceiling. The Sideline can be installed in existing fireplace openings safely. Consult with a licensed professional to ensure your unused gas lines and vents are secured properly. The Sideline fireplace is ventless.

OPERATION: The Sideline’s heater will take the edge off a cool room or basement, and it can be run with no heat, just flames in warmer climates. The Sideline comes with a 6-foot power cord for a 110-120V outlet. It is also hard-wire ready for in-wall install. The unit draws a max of 12 amps, so the fireplace can be used on a 15-amp circuit. A 20-amp circuit may be necessary, depending on the use of other electronics on that same electric circuit.

FEATURES: The Sideline features an unmatched flame. Friends will be nervous to touch realistic flame behind the glass. The Sideline includes faux-fire logs & crystals to create an authentic feel, as well as an IR remote controlling flame color & intensity, the heater and shut-off timer. Front facing heater vents allow you to position the Sideline just 8” under a flat screen TV. The Sideline can be hardwired or plugged in to your electric source.

WHAT YOU NEED TO KNOW: 1. We recommend 8 inches of space between your fireplace & TV. 2. The Sideline pulls a max of 12 amps. 3. The fireplaces includes a wall-mount bracket, if you don’t recess it. 4. You can install the Sideline in an existing fireplace opening. It stays cool to the touch on the sides & back and is ventless. You can use the Sideline with just the flame and no heat. 5. The heater it will warm up a cool room, but won’t replace a primary heat source.

DIMENSIONS: Overall dimensions – 50 3/8” W x 21 ½” H x 5 ½” D; Recessed dimensions – 46 7/8” W x 20 1/4” H x 5 ¼” D (add ¼” to recessed dimensions for rough opening).

SMART FIREPLACE: The Sideline Deluxe Stainless is Wi-Fi enabled for smart home connectivity and mobile app controls. Compatible with voice commands through Amazon Alexa and Google Home.

MEASURE TWICE, BUY ONCE: We want your fireplace upgrade to be smooth and stress-free! Take a few extra moments to measure the height, width, and depth of your fireplace opening before ordering. A quick double-check ensures the perfect fit for a seamless installation. Don't be afraid to reach out if you have questions!

Thin in thickness: Bossin electric fireplace features a thin, pratical and light design. At 3.85 inches thickness, black linear frame,tempered glass with front air outlet., it’s a sleek contemporary fireplace perfectly fit for your living room,entertainment center and bedroom

Big on capability: Full spectrum LED colors,12 flame and LED flame bed color modes; 5 flame speed modes;5 flame brightness levels,specially automatic flame design. Come with crystal glass stone, realistic flame will offer a true-to-life fire experience

Easy to operate: Remote and touch screen make it more convenient to control every function of electric fireplace,power switch, 1-8 hours timer control,independent switch of heating and flame,adjustable flame color and speed, sleep mode function

Quiet on heating: The noise the fireplace heater makes is lower than 40 dB, 750W / 1500W modes can be adjusted accordingly for both warm and energy saving purpose. The supplemental zone heating is for up to 400 square feet