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Buying a window unit that both cools and heats is trickier than it looks, because most of these machines only heat when the weather outside is mild. The one question that decides everything: how cold does it get where you live? If your winters dip below 40°F, a heat-pump style unit will quietly stop warming and just blow cool air, so you need to know which models keep working and which tap out early. This guide breaks down eight 110V window air conditioners with heat so you can match the right unit to your room size, your window, and your actual winter.
I’m Mo Maruf — the founder and writer behind The Tools Trunk. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Choosing well depends on matching BTU (the cooling power rating) to your room size and knowing whether your unit’s heat is a true heat pump or just supplemental. That is exactly what this breakdown of the 110v window air conditioner with heat covers, model by model.
Our Picks at a Glance
How To Choose The Best 110V Window Air Conditioner With Heat
The single biggest mistake buyers make is treating “with heat” as one feature, when it actually splits into two very different things. Get this wrong and you will spend a winter cold no matter what you paid.
Know which kind of heat you are buying
A true heat pump moves warmth from the outside air into your room and keeps working down to temperatures near 41°F and sometimes lower. Supplemental electric heat is a smaller backup coil, and it is designed to take the chill off mild shoulder-season days, not to replace your main furnace in January. The Midea unit here runs a real heat pump, while the Keystone and Whirlpool units carry supplemental heating meant for the days when it is chilly but not deep-winter cold.
Match BTU to your square footage
BTU (British Thermal Units) is simply the measure of how much heat the unit can move out of your room. A higher number cools a bigger space. The units here range from 7,500 BTU up to 12,000 BTU, with the larger numbers suited to open living areas and the smaller ones to bedrooms. Buying far more BTU than your room needs wastes power, and too little leaves you hot on the hottest days.
Check your window and your outlet before you order
Every unit in this group is a standard 110V or 115V household unit, so it runs off a normal outlet rather than a special high-voltage line. Still, measure your window opening width and the height it can clear, and confirm the plug shape matches your socket, because several models here have specific minimum window dimensions and plug requirements that can catch you off guard.
Quick Comparison
| Model | Best For | Cooling BTU | Coverage | Noise | Amazon |
|---|---|---|---|---|---|
| Midea 8,000 BTU Smart Inverter with Heat★ Best Overall | Smart year-round comfort | 8000 | 350 sq. ft. | 45 dBA | Amazon |
| LG 7,600 BTU Window AC with HeatPerfect Fit Pick | Small-room cooling plus mild heat | 7500 | 330 sq. ft. | 52 dB | Amazon |
| ROVSUN 8,000 BTU 4-in-1 Window UnitTight-Window Pick | Tight windows and budget installs | 8000 | 350 sq. ft. | 52 dB | Amazon |
| Keystone 8,000 BTU with Supplemental Heat | Guest rooms and mild-climate backup | 8000 | 350 sq. ft. | — | Amazon |
| Frigidaire 8,000 BTU with Supplemental Heat | Quiet bedrooms with Eco mode | 8000 | 350 sq. ft. | 53 dBA | Amazon |
| ROVSUN 11,000 BTU Inverter with Heater & WiFi | Large rooms with smart control | 12000 | 350 sq. ft. | 40 dB | Amazon |
| GARRISON 12,000 BTU Through-the-Window Heat/Cool | Whole-room cooling with Follow Me sensing | 12000 | 550 sq. ft. | — | Amazon |
| Whirlpool 12,000 BTU Window AC | Big open spaces needing strong heat | 12000 | 550 sq. ft. | — | Amazon |
In‑Depth Reviews
1. Midea 8,000 BTU Smart Inverter Air Conditioner Window Unit with Heat and Dehumidifier
The only unit here running a real inverter heat pump that also talks to your phone.
If you want one box that handles a 350-square-foot bedroom all year, this is the pick the crowd backs — 4.0 stars across 780+ owners. Its 8,000 BTU cooling (the power rating that decides how much heat it moves out of a room) covers that square footage, and the inverter compressor (a motor that ramps up and down instead of slamming on and off) is what keeps the power draw low. Buyers report it runs on roughly a third of the electricity of a standard unit, and Midea rates its airflow efficiency at 0.25 cubic feet per minute per watt. Running as low as 45 dBA (about the level of a quiet conversation), it is the quietest unit on this list alongside the 11,000 BTU ROVSUN.
The heat side is where the smart money lands. This is a true heat pump, and a verified owner sums it up: “true heat pump (250-400W, ~3-4x resistive heat output); solar-compatible.” In plain terms, it sips power while making real warmth — a genuine step up from the backup-coil heating on the Keystone and Whirlpool. The catch is the same one that dogs every heat pump here: it only heats when the outside air is above 41°F. Below that, the pump has nothing to pull from and the heat tapers off. Pair that with the 24-hour timer, Eco energy saver, and app or Alexa control, and it is the most flexible unit on the shelf.
The recurring gripe is well documented and worth knowing: a few owners describe the thermostat drifting, with the set temperature not matching what the room actually feels, and one control panel that behaved erratically over time. Read that as a fit note, not a dealbreaker — for most of the hundreds who own it, cooling is fast, the app and remote work, and the dual heat-and-cool modes do the job. It arrives set up for double-hung windows between 24 and 38.5 inches wide, needing a 14.5-inch vertical sash opening.
Where It Wins
- True heat pump, not a backup coil — real warmth without the power bill spike
- Quietest tier at 45 dBA, quiet enough for a Zoom call or sleep beside it
- App, remote, voice, and panel control — plus a 24-hour timer and five modes
Points To Weigh
- Heat output drops off once the outdoor temperature falls below 41°F
- A control panel or thermostat that drifts is the honest recurring complaint
Reach for this if: you want one quiet, efficient unit for a 350 sq. ft. room and your winters stay above freezing.
Look elsewhere if: your outdoor temperatures routinely plunge below 41°F — the LG below tells the same cold-weather story, so neither replaces a furnace.
2. LG 7,600 BTU Window Air Conditioner with Heat, 115V, Cools 330 Sq.Ft.
Built for the awkward swap — a slide-in chassis that drops into an old through-wall sleeve.
The feature that sells this one is the slide in-out chassis, a tray that lets the whole unit pull out of its sleeve for service or a straight replacement. If you are swapping out a tired through-wall unit, that is worth more than any app. Owners who did exactly that report the LG dropped into the same opening as their decades-old unit with no wall modification needed, and that it stayed quieter than what came out. The 7,500 BTU cooling rating handles a 330-square-foot room, and where the Midea covers a slightly larger footprint, the LG trades that off for its replacement-friendly build. Its 205 cubic feet per minute per watt airflow efficiency is the highest in this group, well above the Midea’s 0.25 figure.
Heating, though, is the honest asterisk. What the LG does well is take the chill off on a cool spring or fall day, and buyers using it that way are satisfied — one put it simply from a 115V window unit: “After feeling the heat I was surprised how good it was.” It runs at two cooling, heating, and fan speeds, and the Auto Restart feature flips the unit back on with your old settings after a power cut. The 24-hour timer and a filter light reminder round it out for a bedroom or office.
But a verifiable pattern among owners is that this is not a deep-winter heater. Owners mention that 2022 regulations trimmed heat output and that it only heats above 40°F — below that, cool air. If your winter means teens and twenties, plan for it as an air conditioner with a mild-season heat bonus. It arrives with a washable filter, remote control, and low-noise operation rated as low as 52dB on the low setting.
The verdict in a line: a comfortable small-room cooler with just enough heat for shoulder season and a chassis made for replacing old wall units.
Trade-off to accept: heat fades below 40°F, so in a hard-freeze climate this is a cooling-primary machine.
The right call for: anyone dropping a new unit into an existing through-wall sleeve or a standard double-hung window in a 330 sq. ft. space.
Pass it by if: you expect this to carry the heating load through sub-freezing nights.
3. ROVSUN 8000 BTU Air Conditioner Window Unit with Heat, 4-in-1
The one that slips into the smallest opening — and asks the least of your toolbox.
What sells this ROVSUN is the install. It is packed with side panels and the mounting bits you need, and the manual walks you through it, so the thing buyers rave about most is how easily it goes in — the fitting itself is the second thing they single out, which is why it keeps landing in tighter windows than the bigger units can manage. The included hardware and clear instructions do the heavy lifting, and it runs on standard 115V/60Hz power off a normal outlet.
The 8,000 BTU cooling rating covers up to 350 square feet, and the unit also runs as a 4,000 BTU heater, a dehumidifier, and a fan — the four-mode setup that gives it the “4-in-1” name. Everything is controlled from the LED display, the remote, or the 24-hour timer, with Eco and auto modes on tap. One comment that keeps surfacing from owners is the light control: the button lights can be switched off, which matters if you are the kind of person who cannot sleep with a glowing panel across the room.
Here is the honest part. Cooling performance draws mixed reactions — plenty of owners find it keeps a room cold, while some report weak or no cooling, and the noise splits the same way, quiet for some and clearly loud when the compressor kicks in for others. Durability gets its knocks too. Read that as a fit note: if you have a small window and a tight budget and you are cooling a modest room, it does the job, but it is not the unit to buy if you need dependable heat through a cold snap or a whisper-quiet bedroom machine. It also runs a Scroll compressor, so expect the startup rumble that comes with a non-inverter design.
Biggest strength: the install kit and easy fit make it the friendliest option for a small or awkward window opening.
Where it asks you to compromise: cooling and noise feedback are both split, and the compressor is audibly loud on startup.
Buy it when: your window is small, your budget is tight, and you are mainly cooling a modest room.
Keep shopping if: quiet operation or strong, reliable heating tops your list — the Midea or Frigidaire suit that better.
4. Keystone 8,000 BTU Window Air Conditioner with 3,500 BTU Supplemental Heating
A cooling-first unit with a smart remote that reads the room from wherever you sit.
Start with the cooling, because that is what this Keystone is built around: 8,000 BTU of it, good for a space up to 350 square feet, with a 248 cubic feet per minute per watt airflow efficiency that puts it in the same efficiency league as the top picks here. The clever bit is the I Sense remote, a controller that measures the temperature right where you are sitting, shows it on its little LCD screen, and pings the unit with that reading. The result is the air conditioner cools toward your actual spot instead of a sensor stuck on the wall, which is why it suits a guest room where comfort is set by whoever is staying.
It also brings a 4-Way Swing to spread air around, plus Energy Saver and Sleep modes to trim the running cost, and everything is handled from the remote or the on-unit touch controls. For a mid-tier unit, that is a tidy feature set for a bedroom or small living room.
Now the catch, and it is a real one. The 3,500 BTU of heat here is supplemental, which means it is meant to top up a room that already has some warmth — Keystone states it should run when outdoor temperatures are between 23 and 76 degrees, and calls it supplemental rather than a primary heat source. Owners who bought it expecting furnace-level heat were let down; those who wanted a cool-season assist did fine. What wins people over is the cooling and the smart remote; the thing to go in clear-eyed about is how modest that heat output really is.
What it nails: strong, efficient cooling and an I Sense remote that reads your spot in the room every three minutes.
The fine print: heat is supplemental only and not meant to be your main source of warmth in the coldest months.
Best matched to: a guest room or small bedroom that needs solid cooling and a little shoulder-season warmth.
Not the pick if: you are counting on this as your primary heater in a freezing climate.
5. Frigidaire 8,000 BTU Window Air Conditioner with Supplemental Heat
Purpose-built for quiet: 53 dBA, six-direction airflow, and Eco mode to keep it frugal.
Where the Midea leans on smart-home tricks, the Frigidaire leans on classic comfort controls done well. Its 8,000 BTU cooling handles a room up to 350 square feet, and it runs at just 53 dBA — a genuinely quiet figure that makes it a natural fit for a bedroom or a small living room where the hum matters. The thing buyers value most is that it simply functions: cooling as promised, no odd noises, no surprises. Owners running it in a small insulated shop with high ceilings report it held temperature even on sub-30°F overnight lows.
The controls are the draw for anyone who likes to dial things in. Six-way directional airflow lets you aim the air where you want it, three fan speeds give you the range, and you get Eco Mode for efficiency, Sleep Mode for quiet nights, and Dry Mode to pull moisture out of the air. There is a 24-hour on/off timer and an Auto Restart that brings your old settings back after a power cut, plus Clean Filter alerts to tell you when the washable filter needs a rinse.
The honest caveat: heat here is supplemental, not primary, and a handful of units arrive with a heat function that never worked right from the start, which is the risk with any supplemental-heat machine. Treat it as the pick for quiet cooling with a mild warm-up assist, and it earns its mid-tier spot.
The Draw
- Whisper-tier 53 dBA — among the quietest units in this group
- Six-way airflow, three fan speeds, plus Eco, Sleep, and Dry modes
- Auto Restart and Clean Filter alerts make it low-maintenance to live with
The Trade-Off
- Heat is supplemental only — not a replacement for your main heating
- A few units ship with a heat function that does not work correctly
Choose it for: a quiet bedroom where cooling quality and dialed-in airflow matter more than heating muscle.
Skip it for: a room that depends on the unit for real winter warmth — supplemental heat will not carry you.
6. ROVSUN 11000 BTU Inverter Window Air Conditioner with Heater & WiFi
The powerhouse of the group — an inverter compressor, WiFi, and the quietest sleep mode on the shelf.
If your room is big and you want it smart, this is the unit to beat. Its cooling power rating is 12,000 BTU, the highest tier in this group alongside the GARRISON and Whirlpool, and it runs an inverter compressor, the ramping type that keeps power draw and noise steady instead of cycling hard on and off. The payoff is twofold: ROVSUN rates it at 35% more energy savings than traditional units, and the sleep mode drops to just 40dB — the quietest figure in this entire group. That is a unit you can run overnight beside your bed without a second thought.
Control is where it pulls ahead of the Frigidaire and Keystone: beyond the panel and remote, it links to your phone app and works with Alexa and Google Assistant, so you can set routines and adjust the temperature from anywhere. There is a 4-way swing for even airflow, and it doubles as a dehumidifier or a fan-only machine. What owners praise most is straightforward cooling performance — reviewers report it drops the room temperature nicely even at medium speed and installs easily, with the 110V voltage confirmed correct for standard household power.
The heat side comes with a specific operating window you should read carefully: ROVSUN states not to run Cool or ECO mode below 32°F, or Heat mode below 5°F, and its heating output is rated at 1,100 BTU — a modest number that makes this a cool-weather assist rather than a furnace. Cooling draws a small amount of mixed feedback, with a rare unit arriving with damaged side panels. It fits windows between 24.5 and 36 inches wide with a 15.5-inch minimum height.
Standout Features
- Inverter compressor rated for 35% more energy savings than traditional units
- 40dB sleep mode — the quietest on this list, plus WiFi, app, and voice control
- 12,000 BTU cooling power rating — tied for the highest here
Worth Knowing
- Heating output is rated at a modest 1,100 BTU — a supplement, not main heat
- Has set temperature limits for Cool and Heat modes, so check them before relying on it in deep cold
Reach for this if: you want the quietest, smartest, most powerful cooler here and only light heating.
Look elsewhere if: real winter warmth is the priority — this one is built to cool first.
7. GARRISON 2477802 R-410A Through-The-Window Heat/Cool Air Conditioner
Roomy cooling for larger spaces, with a Follow Me remote that tracks your temperature.
The headline here is reach: this 12,000 BTU unit is rated for a floor area up to 550 square feet, which puts it in the same big-space bracket as the Whirlpool and well beyond the 350-square-foot picks. For a large room, a garage conversion, or a rental where one unit has to cover real ground, that coverage is the reason to shortlist it. It runs a galvanized cabinet for durability and a self-evaporative system that handles condensate without a drain bucket in most conditions, so it is one of the more set-and-leave-it units in this group.
The comfort controls are simple but complete: five modes (Fan, Cool, Heat, Dehumidifier, and Auto), a 24-hour timer, Sleep mode, and the Follow Me function, which adjusts room temperature based on the reading at the remote rather than at the unit itself. Owners running it in a 275-square-foot room report both the air and the heat working well and delivering as expected, which lines up with a unit you buy to cover a whole space rather than a corner of one.
Two things to plan for. First, it does not ship with supporting brackets, and owners who mounted one note the weight wants a proper support underneath to take stress off the window — budget a bracket into the install. Second, it runs a standard rotary_scroll compressor with no inverter, so it is a straight on/off machine rather than a gentle ramping one, and a few units have failed early. Buy it for coverage and the Follow Me convenience, and mount it right from day one.
The strong suit: a 550-square-foot coverage rating and a Follow Me remote make it a one-unit solution for larger rooms.
Plan for this: buy supporting brackets yourself, since they are not included, and expect a non-inverter compressor with the usual cycling.
The fit for: big rooms that need one unit to cover 550 square feet, cooled and lightly warmed.
The miss for: anyone who wants a quiet inverter unit or a heating machine built for hard freezes.
8. Whirlpool 12,000 BTU Window Air Conditioner, up to 550 Sq Ft.
The biggest cooler of the bunch — 12,000 BTU for 550 square feet, with heat to top it off.
This Whirlpool is the heavyweight: a 12,000/11,600 BTU cooling unit rated for spaces up to 550 square feet, backed by 11,000/9,000 BTU of supplemental heat. Its 270 cubic feet per minute per watt airflow efficiency is strong, and the control panel is loaded with three cooling speeds, Eco mode, Sleep mode, and a programmable 24-hour on/off timer with 8-way directional louvers to fan air where you need it. It also includes a reusable washable filter that pulls dust and debris out of the air, and a remote to run it from across the room.
Real-world heating can genuinely surprise you. Customers note the heat mode keeping a small studio apartment warm through a stretch of consecutive teen-temperature days. Install is handled by a window mounting kit that fits windows with a minimum height of 19.5 inches, and setup is simple enough that owners finish it without help.
The caveats are worth a clear-eyed read. Whirlpool labels the heat supplemental and says it is not meant to be a primary heat source in the coldest months. Functionality draws mixed reports, with a recurring theme about the size and plug: a couple of owners found the listed width did not match the actual unit and the outlet required a specific configuration. There is also a pattern of units arriving with shipping damage. None of that makes it a bad pick for a large space — just measure your window opening and confirm your outlet before ordering, so you are not the one re-cutting trim or hunting an adapter.
Why It Tempts
- Top-tier 12,000/11,600 BTU cooling for rooms up to 550 square feet
- 11,000/9,000 BTU supplemental heat — reviewers point out it holds warmth through cold snaps
- Three cooling speeds, Eco and Sleep modes, 8-way louvers, and a washable filter
Check Before You Order
- Labeled supplemental heat only — not a primary source for the coldest months
- Measure and confirm the outlet, as a few owners hit a size or plug mismatch, and some units arrived damaged
Buy it for: a large open room that needs the most cooling muscle here, with a heat boost on top.
Keep shopping if: your priority is quiet inverter operation or a smaller, easier window fit.
Understanding the Specs
Heat Pump vs Supplemental Heat
A heat pump moves warmth from the outside air inside, so it can create real heat from a small amount of electricity — but it needs outdoor air to work with, which is why these units stop heating below roughly 41°F. Supplemental heat is a smaller backup coil meant only to take the edge off a chilly day. The Midea and ROVSUN 11,000 BTU units use heat-pump or inverter heating; the Keystone, Frigidaire, and Whirlpool units use supplemental heat. If you want warmth you can lean on, know the difference first.
BTU and Room Size
BTU (British Thermal Units) measures how much heat a unit can move, and it sets the room it can serve. In this group the range runs from 7,500 BTU up to 12,000 BTU, with coverage from 330 to 550 square feet. An oversized unit in a small room cools too fast and cuts off before it can pull the humidity out, while an undersized one never catches up on the hottest days. Match the BTU rating to the space you are actually cooling.
FAQ
Do 110V window air conditioners with heat work in a regular outlet?
Why does the heater stop working when it gets really cold outside?
How many BTU do I need to cool my room?
What window sizes do these units fit?
Is an inverter window AC better than a standard one?
Can I run the heat and cooling at the same time?
How loud are these window units at night?
Do I need to drain these units or empty a water tank?
Will these units work in a through-the-wall opening or only a window?
How much can I save on electricity with a heat-and-cool window unit?
Final Thoughts: The Verdict
For most people, the 110v window air conditioner with heat winner is the Midea 8,000 BTU Smart Inverter because it is the only unit here that pairs a real heat pump with smart control, quiet 45 dBA operation, and a broad 350-square-foot reach. If quiet bedtime cooling is what you are after, reach for the ROVSUN 11,000 BTU Inverter with its 40dB sleep mode. And if you have a small, awkward window and a careful budget, the ROVSUN 8,000 BTU 4-in-1 installs with the least fuss. One last nudge worth acting on: before you buy any of these, measure your window opening and confirm the heat type, because matching those two things to your space is the difference between year-round comfort and a cold February.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of September 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, The Tools Trunk earns from qualifying purchases. This does not affect which products we feature.