5 Best Smart Plugs for Space Heaters (2026)

The best smart plugs for a space heater need to do more than turn on with your voice. A typical portable heater pulls close to the maximum a household outlet can handle, so the wrong plug can trip a breaker, warp under heat, or worse, become a fire hazard.

Most everyday smart plugs are built for lamps, chargers, and small electronics that draw a few hundred watts at most. A space heater is a different category of load entirely, which is why this guide only considers plugs rated for the full 15A/1800W a heater setting can demand.

We compared those plugs on amp and wattage ratings, safety certifications, and app scheduling, then weighed that against patterns in verified customer reviews. Five stood out as genuinely built for this kind of heavy, sustained load, rather than merely tolerating it.

How We Picked

We compared official amp and wattage ratings, safety certifications like UL and ETL, and manufacturer documentation for each plug, then checked that against recurring themes in verified Amazon customer reviews, especially reports of plugs running warm or dropping offline under a heavy load. We also gave extra weight to plugs whose own listings and documentation specifically address high-wattage appliances, rather than staying silent on the subject. Our picks reflect that research, not paid placement.

Best Smart Plugs for Space Heaters, At a Glance

Here’s how the five plugs compare on rating, ecosystem support, and where each one fits best.

Prices shift often, especially around Prime Day and the holidays, so treat this as a snapshot and check the live price before buying.

1. Kasa Smart Plug Mini KP115: Best Overall

The Kasa KP115 is the plug we point most people to first for a space heater. It carries the full 15A/1800W rating a heater needs, and it’s been on the market long enough that owners have a real track record of running it under sustained heavy loads without issues.

Monitoring and Scheduling

The Kasa app shows real-time wattage alongside daily, weekly, and monthly history, so you can confirm your heater is drawing what the spec sheet says and catch it if usage climbs unexpectedly. Scheduling and an away mode let you set the heater to shut off automatically instead of relying on memory.

It connects directly to Alexa, Google Home, and SmartThings without a hub, and its compact shape won’t block the second outlet on a wall plate. With tens of thousands of positive reviews behind it, it’s the safest first buy if you haven’t used a smart plug for a heavy appliance before.

Owners who use it with heaters and other high-draw appliances commonly point to its long uptime and stable Wi-Fi connection as the reason they trust it for something that needs to stay reachable, whether that’s turning a heater on before you get home or confirming it actually shut off.

2. TP-Link Kasa Smart Plug Mini EP25 (2-Pack): Best for Apple HomeKit

The EP25 is built on the same 15A platform as the KP115, with energy monitoring and the same reliable app, but adds native Apple HomeKit and Siri support on top of Alexa and Google Home.

It’s UL certified and sold as a 2-pack, which is convenient if you’re running heaters in more than one room this winter. The tradeoff is a smaller review history than the long-established KP115, though the underlying hardware and app are shared across TP-Link’s Kasa line. For Apple Home households, it’s the clear pick.

Because it uses the same Kasa app as the KP115, mixing the two across different rooms is straightforward, and you get one consistent place to check energy use across every heater in the house.

3. Govee Smart Plug with Energy Monitoring: Best Budget

Govee’s energy-monitoring plug brings the same 15A rating and real-time power tracking down to a lower price, with current and voltage readings alongside wattage in its app.

It connects over both Wi-Fi and Bluetooth, so local control through the app keeps working even during a brief internet outage, and it’s ETL and FCC certified with fire-resistant housing material called out specifically in its listing. Group control makes it easy to schedule a heater alongside a fan or humidifier from one screen. For anyone watching cost per plug, this is the value pick.

Reviewers frequently mention the app’s per-device breakdown as the feature that convinced them to keep using it, since it turns an abstract electric bill into a clear picture of which appliance is actually responsible for the increase.

4. BN-LINK Heavy-Duty Smart Plug (2-Pack): Best for Heavy Loads

BN-LINK markets this plug specifically as a heavy-duty outlet rather than a general-purpose smart plug that happens to tolerate 15A, and its listing calls out high-load appliances like space heaters by name.

It’s rated for 15A/1875W, grounded, and ETL listed, and it works with Alexa and Google Assistant without a hub. It skips energy monitoring, which keeps things simple if all you want is reliable remote and scheduled control over a heater’s power. Sold as a 2-pack, it’s a practical choice if you’re outfitting more than one heater for the season.

BN-LINK has built a niche around outlets meant for demanding appliances rather than general smart home gadgets, and that focus shows up in owner feedback, with buyers specifically calling out heaters, window AC units, and holiday lighting as loads they trust it with.

5. SwitchBot Plug Mini: Best Multi-Platform

The SwitchBot Plug Mini earns its spot with the broadest ecosystem support here, working cleanly across Alexa, Google Assistant, and Home Assistant, while still carrying a 15A rating and energy monitoring that refreshes close to real time.

Its dual Wi-Fi and Bluetooth connection means local schedules keep running even if the cloud connection hiccups, and its compact shape keeps the neighboring outlet free. If you’re mixing smart home platforms, or lean toward Home Assistant, this is the plug built for that kind of setup.

It’s a newer entry than the Kasa and BN-LINK lines, so its track record under sustained heater use is shorter, but its specs and certifications match the more established picks here, and early owner feedback on reliability has been positive.

How to Choose a Smart Plug for a Space Heater

A heater is one of the most demanding things you can plug into a smart outlet, so a few details matter more here than they do for a lamp or a fan.

Match the amp rating to the heater’s wattage. Most portable electric heaters draw between 750W and 1,500W, and a 15A/1800W smart plug covers that with margin. Skip plugs rated for only 10A or that don’t list a wattage rating at all, they’re built for smaller loads like lights and chargers.

Respect the continuous-load rule. Electricians generally treat a circuit’s continuous rating as 80 percent of its max, so a 15A plug is best kept under about 1,440W for hours-long use. If your heater runs at its full 1,500W setting for long stretches, that’s worth factoring in when you pick a plug and an outlet.

Look for a grounded, certified plug. UL or ETL certification, a grounded design, and a solid-feeling build all matter more with a sustained heavy load than they do with a low-power gadget. The BN-LINK and Kasa picks here are explicit about their certifications.

Use scheduling as a safety net, not a substitute for supervision. A smart plug’s timer or away mode is great for making sure a heater doesn’t run all night, but it doesn’t replace a heater with its own thermostat and tip-over shutoff. Pair the two rather than relying on the plug alone.

Consider energy monitoring if you run a heater often. Seeing exactly how many watts a heater pulls, and what that costs over a month, tends to change habits fast. The Kasa, Govee, and SwitchBot picks all track this; the BN-LINK skips it in exchange for a simpler, more affordable design.

Inspect the outlet and cord, not just the plug. A smart plug rated for 15A won’t help much if it’s sitting in an old, loose outlet or paired with a worn extension cord. Space heaters should generally go straight into a wall outlet rather than a power strip or extension cord, smart or otherwise.

Our Verdict

For most people, the Kasa Smart Plug Mini KP115 is the best smart plug for a space heater in 2026. It combines the full 15A/1800W rating a heater needs with real-time energy monitoring and dependable Alexa and Google Home support, backed by a long history of positive owner feedback.

If you’re in an Apple Home household, the Kasa EP25 delivers the same core experience with HomeKit support built in. Budget-conscious buyers should look at the Govee Smart Plug, and anyone running more than one heater should consider the 2-pack BN-LINK Heavy-Duty.

Whichever you choose, don’t skip the amp rating just to save a few dollars, it’s the one spec that actually matters for a heater. Check the latest price on Amazon before you buy. If you’re prepping a room for winter, also check out our guides to the best smart thermostat for renters and the best robot vacuum and mop combo to keep floors clean while you stay warm.