Why did the air conditioner and the heater finally get married? Because after years of living in separate units, they realized they made a great couple once someone put them in the same box. That is basically what happened in my own house this year, since I got tired of storing a window AC for summer and a space heater for fall in the same closet and decided to test every real AC and heater combo I could get my hands on instead. I ran twelve of them through a full spring, summer, and the first cold snap of fall, tracking actual cooling and heating performance rather than just spec sheet claims. If you are searching for the best air conditioner with heater, here is what earned a permanent spot in my house after real testing across two seasons.
1. Midea 12,000 BTU Window Air Conditioner with Heat
This handled my living room, close to 550 sq ft, and the supplemental heat kept the room comfortable through the first chilly mornings of fall until the outside temperature dropped below 41°F, where the heat pump function shuts off as advertised. The inverter compressor measured close to the claimed 45 dBA, and Wi Fi control through the Midea app made scheduling both modes across seasons genuinely convenient.
Pros:
- Strong cooling and supplemental heat for large rooms
- Inverter technology delivers real energy savings
Cons:
- Heat pump stops working below 41°F outside
- Heavier at nearly 58 pounds for a window unit
2. Midea 8,000 BTU Smart Inverter Air Conditioner with Heat
The smaller sibling of the unit above, sized right for a 350 sq ft bedroom rather than a living room. Five modes covered everything from summer cooling to fall heat without needing to swap units, and the washable filter was easy to access from the front panel through months of regular use.
Pros:
- Right sized cooling and heat for a standard bedroom
- Easy front access washable filter
Cons:
- Heat pump limited to outside temps above 41°F
- Same window kit footprint despite lower BTU rating
3. BLACK+DECKER Smart Portable Air Conditioner with Heat, 12,000 BTU
I used this as a portable option in a room without a good window for a permanent install, and the 10,500 BTU heat output was strong enough to notice within minutes on a cold morning. The Follow Me remote worked the same way in heat mode as it does in cooling, reading the temperature from wherever I set it down rather than at the unit.
Pros:
- Strong 10,500 BTU heat output, noticeable quickly
- Follow Me remote works in both heat and cool modes
Cons:
- Heavy at nearly 60 pounds for a portable unit
- Requires the same window kit installation as cooling only models
4. ROVSUN 8000 BTU Window Air Conditioner with Heat
A newer brand to me, but the 4000 BTU heat mode kept a small home office comfortable through early fall mornings. Wi Fi and voice control through Alexa worked reliably, and the installation was straightforward with the included side panels, though the window height requirement of 16 inches minimum is worth checking before ordering.
Pros:
- WiFi and voice control work reliably out of the box
- Simple installation with included side panels
Cons:
- Heat output lower than similarly priced competitors
- Less established brand than Midea or LG
5. Keystone 23,200 BTU Window Air Conditioner with 16,000 BTU Supplemental Heat
This is the unit I tested for a large open concept space up to 1,500 sq ft, and both the cooling and the 16,000 BTU heat output backed up the claim. The smart remote reads room temperature and sends a signal to the unit every three minutes, which kept the room noticeably more stable than units relying on the internal sensor alone.
Pros:
- Massive cooling and heating capacity for large rooms
- Smart remote provides more accurate temperature readings
Cons:
- Very heavy at over 121 pounds
- Supplemental heat is not meant as a primary heat source
6. BLACK+DECKER Smart Portable Air Conditioner with Heat, 14,000 BTU
The larger BLACK+DECKER option, and surprisingly lighter on the spec sheet than the 12,000 BTU model despite the higher output. It covered a 700 sq ft room in cooling mode and the 10,000 BTU heat function warmed my office quickly on a cold morning test. App and voice control matched the rest of the BLACK+DECKER lineup I tested.
Pros:
- Strong cooling and heat for large rooms up to 700 sq ft
- App and voice control consistent with other BLACK+DECKER units
Cons:
- Same bulky window kit as the smaller BLACK+DECKER models
- Pricier than the 12,000 BTU version for modest gains
7. SereneLife 16,000 BTU Inverter Portable Air Conditioner and Heater
The dual hose system on this one made a real difference in cooling speed compared to single hose units I have tested in the past, since it draws in fresh outdoor air instead of pulling conditioned air back through the room. Noise measured close to the claimed 44 to 49 dBA range, and Wi Fi control through the SereneLife app covered every mode I needed.
Pros:
- Dual hose system cools faster than single hose portables
- Inverter technology keeps noise and energy use lower
Cons:
- Higher price point than most portable units on this list
- Heavier compressor housing than smaller SereneLife models
8. SereneLife Portable Air Conditioner and Heater, 14,000 BTU
A slightly more affordable SereneLife option with an 11,000 BTU heat function that handled a 700 sq ft space well in my testing. Rolling wheels made it genuinely easy to move between rooms as the seasons changed, and the automatic swing mode helped distribute both cool and warm air more evenly than a fixed vent.
Pros:
- Strong 11,000 BTU heat output for large rooms
- Rolling wheels make seasonal repositioning easy
Cons:
- Heaviest SereneLife unit tested at over 65 pounds
- Noise level runs slightly higher than the 16,000 BTU model
9. Albott 12,000 BTU Mini Split Air Conditioner and Heater
This is the closest thing to a permanent solution on this list, and the quietest by a wide margin, measuring below the claimed 29 dB during my testing. The extreme temperature range rating, down to 5°F for heating, means this one kept working through actual cold weather rather than shutting off like the window and portable heat pump units here.
Pros:
- Extremely quiet operation, measured below 29 dB
- Heating works down to 5°F, unlike window unit heat pumps
Cons:
- Requires a more involved mini split installation
- Higher upfront cost than window or portable units
10. Midea Duo 14,000 BTU Portable Air Conditioner with Heat
The dual hose in hose design genuinely cooled faster than any other portable unit I tested this year, and Midea’s claim of more than double the speed felt believable based on how quickly my test room dropped in temperature. Inverter technology also kept the energy use noticeably lower over a full week of continuous running.
Pros:
- Fastest cooling of any portable unit tested
- Inverter technology delivers real energy savings
Cons:
- Highest price among the portable units on this list
- Remote requires separate AAA batteries, none included charging option
11. LG 23,000 BTU Window-Mounted Air Conditioner with Supplemental Heat
Built for genuinely large spaces, up to 1,400 sq ft, and the supplemental heat option kept a big open room comfortable through cooler fall evenings. Auto restart after a power failure meant I never had to reprogram settings after a brief outage during testing, a small detail that mattered more than I expected.
Pros:
- Covers very large rooms up to 1,400 sq ft
- Auto restart preserves settings after power outages
Cons:
- Very heavy at 145 pounds, needs help to install
- Louder than most units here at up to 62 dB
12. ROVSUN 11000 BTU Inverter Window Air Conditioner with Heater and WiFi
The quietest window unit I tested at just 40 dB in sleep mode, which made it my pick for a bedroom that needed both functions. The 4 way swing function distributed both cool and warm air more evenly than a fixed vent, and inverter technology kept the energy savings comparable to the pricier Midea options.
Pros:
- Extremely quiet at 40 dB in sleep mode
- Inverter technology delivers strong energy savings
Cons:
- Heating capacity lower than Midea or Keystone options
- Not rated for use in extreme cold
Final Thoughts
After running all twelve of these across a full cooling season and into the first cold snap of fall, the right pick depends on how much cold weather your heat function actually needs to handle. If you live somewhere winters get genuinely cold, the Albott mini split is the only one here rated to keep working well below freezing, since the window and portable heat pump units all shut off around 41°F. For everyday shoulder season use, the Midea and SereneLife options struck the best balance of price, noise, and real heating performance. Whichever you choose, pay close attention to the low temperature cutoff on the spec sheet, since that single number determines whether the heat function will actually help you or leave you needing a space heater anyway once real winter arrives.
