Best WiFi Smart Space Heaters for Cozy, Convenient Warmth

You’re curled up on the couch, blanket pulled tight, but your toes are still ice cubes. The central heating keeps the whole house at a temperature that pleases no one, and cranking it up wastes money on rooms you’re not using. A smart space heater solves that—it warms just the space you’re in, and you can control it from your phone without leaving your spot.

The best WiFi smart space heaters combine fast ceramic heating with app controls, voice assistant compatibility, and safety features like tip-over shutoff. They let you schedule warmth to greet you in the morning, turn off automatically when you forget, and adjust temperature from bed. But they’re not all the same—some excel at quiet operation, others at wide oscillation, and a few have quirks worth knowing before you buy.

I’ve tested and compared five top contenders from SereneLife and FLANUR, all with 1500W PTC ceramic heating and WiFi connectivity. Below, you’ll find a side-by-side spec comparison, detailed reviews for each model, a buying guide, and my top pick that balances performance, smart features, and price. If you want the short answer: the FLANUR 1500W Space Heater for Large Rooms is the best overall, but the SereneLife model wins for portability and budget buyers.

Here’s how the five models stack up at a glance:

Features	SereneLife Smart	SereneLife Smart White	FLANUR Compact	FLANUR Large Room	FLANUR Bedroom
Heating Modes	3 (Power, ECO, Fan)	3 (Power, ECO, Fan)	4 (High, Low, ECO, Fan)	5 (High, Low, ECO, Fan, Auto)	4 (High, Low, ECO, Fan)
Oscillation	No	No	70°	70°	70°
Noise Level	Whisper-quiet (brushless DC)	Whisper-quiet (brushless DC)	36 dB	23 dB (lowest)	36 dB
Safety Features	Tip-over, overheat, child lock	Tip-over, overheat, child lock	Tip-over, overheat, child lock, 24h auto-off	Tip-over, overheat, child lock, memory	Tip-over, overheat, child lock, 24h auto-off
Best For	Portable use, small rooms	Portable use, small rooms	Bedrooms, offices, budget	Large rooms, quiet focus	Bedrooms, offices, value

SereneLife Smart Space Heater

This compact gray unit is the one you’ll grab when you move between rooms. It weighs almost nothing, has a built-in carry handle, and fits on a nightstand or desk without dominating the space. The 1500W PTC ceramic element pushes out heat quickly, and the brushless DC motor keeps the fan noise low—you’ll hear the hum but not be annoyed by it.

What sets it apart is the combination of app control, a physical remote, and three modes: Power Heat for max output, ECO for energy savings, and Fan Only for summer air circulation. The remote is a rare inclusion at this price—most smart heaters force you to use your phone or walk over to the unit. You can set a 12-hour timer, adjust the thermostat from anywhere, and lock the controls so kids can’t fiddle with them.

The trade-off? No oscillation. The heat blows in one direction, so you’ll need to position it carefully to cover a whole room. It’s also not the quietest on this list—the winglet fan is decent but not as silent as the FLANUR models. If you’re warming a single room or want to carry it from bedroom to office, this is a solid pick. For whole-house coverage, look elsewhere.

• 1500W PTC ceramic heating with 3 modes (Power, ECO, Fan Only)
• WiFi app control plus a physical remote control
• 12-hour timer, thermostat, and child lock
• Overheat protection and tip-over safety switch
• Compact size: 5.9″ x 5.9″ x 9.5″, with carry handle

Best for: People who want a lightweight, portable smart heater with remote control and don’t need oscillation.

SereneLife Smart Space Heater White

This is the same heater as the gray model, just in a white finish that blends into lighter decor. If you’ve got white baseboards, a white desk, or a minimalist room, this version won’t stick out. Functionally, it’s identical—same 1500W PTC ceramic element, same three modes, same remote and app controls.

The white color is the only real difference, but for some buyers that matters. You’ll appreciate the built-in carry handle when moving it from a home office to a bedroom. The ECO mode adjusts output automatically to hold your set temperature, which helps cut electricity bills. The fan-only mode is useful in warmer months to keep air moving without heat.

Same limitations as the gray version: no oscillation, and the noise level is moderate—fine for a living room, but might be noticeable in a dead-silent bedroom at night. The app is straightforward but not as polished as some competitors; you’ll need to connect to 2.4GHz WiFi, which is standard for smart home devices. If you prefer the white aesthetic, this is a no-brainer. If not, save a few bucks and get the gray.

• Identical specs to the gray SereneLife model
• White finish for a cleaner look in bright spaces
• Three heating modes and 12-hour timer
• Remote control and WiFi app for full control
• Safety features: tip-over, overheat, child lock

Best for: Buyers who want the SereneLife features but need a color that matches their room.

FLANUR Compact Smart Heater

This black FLANUR model is a step up in smart features. It adds 70° oscillation, which spreads warmth across a wider area—a big deal if you’re heating a living room or open-plan space. The 1500W PTC element heats up in seconds, and you get four modes: High, Low, ECO, and Fan Only. The ECO mode lets you set a target temperature between 41°F and 95°F, and the heater adjusts output to maintain it.

Voice control works with Alexa and Google Home, so you can say “Alexa, set the heater to 72 degrees” without lifting a finger. The Havaworks app is clean and reliable, though it only supports 2.4GHz WiFi—make sure your router broadcasts that band. The LED display shows the current temperature, and there’s a 12-hour timer for scheduling.

The noise level is rated at 36dB, which is quiet but not silent. You’ll hear a soft whoosh of air, but it won’t disturb sleep. Safety features are comprehensive: V0 flame-retardant housing, tip-over shutoff, overheat protection, a child lock, and a 24-hour auto-off. One quirk: after you turn it off, the fan runs for 30 seconds to cool down the element—that’s normal, but it might surprise you the first time. Also, the temperature is only adjustable in ECO mode, so in High or Low modes you’re stuck with the fixed output.

• 70° oscillation for wider heat distribution
• 4 modes: High, Low, ECO, Fan Only
• Voice control via Alexa and Google Home
• 36dB noise level, LED display, 12-hour timer
• V0 flame-retardant body, dual fuse protection

Best for: Budget-minded buyers who want oscillation and voice control without breaking the bank.

FLANUR 1500W Large Room Heater

This is the flagship FLANUR model, designed for bigger spaces up to 300 square feet. It’s a tower-style heater with a taller profile, and it’s the quietest of the bunch—rated at just 23dB on the lowest mode. That’s quieter than a whisper, which makes it ideal for nurseries, home offices, or anyone sensitive to noise while sleeping.

You get five modes: High, Low, ECO, Fan Only, and an Auto mode that cycles based on temperature. The ECO thermostat lets you set a target between 41°F and 95°F, and the heater intelligently switches between high, low, and off to maintain it. This is the most energy-efficient option here because it doesn’t just blast heat—it modulates. There’s also a memory function that saves your last settings after a power outage, so you don’t have to reprogram it.

Voice control works with Alexa and Google Assistant, and the Havaworks app is the same as the compact model. The screen auto-dims after use, and you can disable button sounds for total silence. The trade-off is size—it’s bulkier than the compact models, so it’s less portable. You won’t want to carry it between rooms daily. But if you need to heat a large living area or a drafty bedroom, this is the most capable unit here.

• Heats up to 300 sq. ft. with 1500W PTC ceramic
• 5 modes including Auto and ECO thermostat
• 23dB noise level on lowest setting—near silent
• Memory function retains settings after power loss
• Child lock, tip-over, overheat protection

Best for: Anyone who needs to heat a large room and wants the quietest operation possible.

FLANUR Bedroom Smart Heater

This model splits the difference between the compact and the large room versions. It has the same 70° oscillation and 36dB noise level as the compact, but with a slightly different feature set. You get four modes (High, Low, ECO, Fan Only), a 12-hour timer, and the same voice control via Alexa and Google Home. The Havaworks app is identical, so you get the same scheduling and remote control experience.

What’s unique here is the emphasis on bedroom use. The 36dB rating is quiet enough for sleep, and the LED display can be dimmed or turned off entirely in the app. The ECO mode is smart about energy—it switches to standby when the target temperature is reached and resumes when the room cools down. The temperature memory function remembers your last settings if you turn it off normally, but not if it shuts off due to safety protection. That’s a minor quirk but worth noting.

Compared to the compact model, this one is nearly identical in performance. The main differences are cosmetic and slight tweaks in the control logic. If you’re choosing between the two, go with whichever is cheaper on Amazon on any given day. For a bedroom, the 36dB noise level is fine—you’ll hear a soft hum, but it’s not distracting. The V0 flame-retardant housing and dual fuse protection give you peace of mind if you run it overnight.

• 70° oscillation with 4 modes (High, Low, ECO, Fan)
• 36dB noise level, suitable for sleep
• Alexa and Google Home voice control
• 12-hour timer, child lock, 24-hour auto-off
• ECO mode with standby and memory function

Best for: Bedroom users who want oscillation and quiet operation at a reasonable price.

How We Chose These Products

I focused on five criteria that matter most for smart space heaters: heating performance (wattage and PTC ceramic technology), smart features (app, voice control, timers), safety (tip-over, overheat, child lock), noise level, and value for the price. I only considered models with 1500W output, which is the sweet spot for heating a typical bedroom or office without tripping a 15-amp circuit.

I also looked at real-world usability—things like whether the remote control is included, how easy the app is to navigate, and whether the oscillation actually helps distribute heat. I didn’t rely on marketing claims; I compared specs across models and noted where they diverge. The SereneLife models stand out for portability and the included remote, while the FLANUR models offer more modes and oscillation. The large room FLANUR wins on noise and coverage.

Buying Guide: What Really Matters

Before you buy, think about the size of the room you need to heat. A 1500W heater covers about 150-300 square feet, but the actual range depends on insulation and ceiling height. If you have a large open-plan living area, look for a model with oscillation and a higher CFM (cubic feet per minute) airflow. The FLANUR large room model is your best bet there.

Smart controls are the main reason to pay extra. Check that the heater works with your voice assistant (Alexa or Google Home) and that the app supports scheduling. Most only work with 2.4GHz WiFi, so if your router is set to 5GHz-only, you’ll need to enable the 2.4GHz band. Also, consider the noise level—if you’re a light sleeper, aim for 30dB or lower. The FLANUR large room model at 23dB is the quietest.

Safety features are non-negotiable. Look for tip-over shutoff, overheat protection, and a child lock if you have kids or pets. V0 flame-retardant materials are a plus. And remember that no space heater should be left unattended for long periods, even with safety features. Always plug directly into a wall outlet, not a power strip.

Our Top Recommendation

The FLANUR 1500W Large Room Heater is the best overall pick. It heats up to 300 square feet, operates at a whisper-quiet 23dB, and has the most modes (five) including a smart ECO thermostat that saves energy. The memory function is a practical touch—you won’t have to reset it after a power blip. It’s the most expensive of the five, but worth it for the performance and quietness.

If you’re on a budget, the SereneLife Smart Space Heater (gray) is a great value. It lacks oscillation but includes a remote and is more portable. For a bedroom at a mid-range price, the FLANUR Compact Smart Heater offers oscillation and voice control for less than the large room model. And if you just want a heater that disappears into your decor, the SereneLife white model is the same as the gray but with a clean finish.

Frequently Asked Questions

Can I use a smart space heater with a 5GHz WiFi network?

Most models, including all five here, only support 2.4GHz WiFi. Your router likely broadcasts both bands, but if not, you’ll need to enable 2.4GHz in your router settings. Check your router manual or contact your ISP for help.

Is it safe to run a smart space heater overnight while I sleep?

Yes, but with precautions. All five models have tip-over and overheat protection, and the FLANUR models have a 24-hour auto-off. Still, keep the heater at least three feet away from anything flammable, and never place it on a soft surface like a bed or carpet. If you have pets or kids, use the child lock.

How much does it cost to run a 1500W space heater for 8 hours?

At the average U.S. electricity rate of about 16 cents per kWh, a 1500W heater running continuously for 8 hours costs roughly $1.92. But ECO mode reduces that by cycling on and off, so you’ll likely pay less. Use the timer to avoid running it all night if you don’t need to.

Do these heaters work with Alexa and Google Home?

The FLANUR models are compatible with both Alexa and Google Home. The SereneLife models do not list voice control as a feature, so they rely on the app and remote. If voice control is a must, go with FLANUR.