5 Best Through-the-Wall Air Conditioners with Heat Under $500 in 2026
We compared five heat and cool wall units under $500 on cooling capacity, heating output, power needs, noise and controls.
By Daniel Brooks
Updated October 19, 2026
Heat and cool wall units usually cost more than cooling-only models, but you can still find capable ones without stretching the budget. Our list of the best through-the-wall air conditioners with heat under $500 compares five models, from 8,000 BTU units that plug into a standard outlet to 12,000 BTU units with strong 230 volt heaters, including several with app and voice control. To browse every model we cover, visit our Through-the-Wall Air Conditioners with Heat page.
We compared these through-the-wall air conditioners with heat under $500 on cooling capacity, heating output, power needs, noise and controls. Prices change often, so check the product cards for the current price of each unit.
All Products Compared
| Product | Best For | Cooling | Heating | Power | Notable Feature |
|---|---|---|---|---|---|
| OLMO 8,000 BTU Through-the-Wall AC & Heater | Overall | 8,000 BTU/h | 4200 BTU/h | 115V | Smart kit, 52 dB |
| OLMO 12,000 BTU 230V Through-the-Wall AC & Heater | Strong heat | 12,000/11,700 BTU/h | 10,600/8,600 BTU/h | 208/230V | Smart kit, R-32 |
| ROVSUN Smart 8,000 BTU Through the Wall Air Conditioner with Heat | Most ratings | 8000 BTU | 4200 BTU | 115V | Auto mode, Alexa, Google |
| Keystone 10,000 BTU Wall Mounted AC with Heat | Medium rooms | 10,000 BTU | 10,600 BTU | 230V/20A | Follow me remote |
| Bonnlo 8000 BTU Through the Wall Air Conditioner with Heat | Newer smart option | 8,000 BTU | 4,200 BTU | 115V | 4 fan speeds, app and voice |
| Award | Product | WikiCooling Score About WikiCooling ScoreThe WikiCooling Score is our own rating from 0 to 10, based on the criteria described on our How We Review page. It reflects research, not laboratory measurement, and is never influenced by manufacturers, retailers, or affiliate commissions. Learn more › | |
|---|---|---|---|
| Best Overall |
OLMO 8,000 BTU Through-the-Wall AC & Heater
|
8.1/10 | Buy |
| Best Premium |
OLMO 12,000 BTU 230V Through-the-Wall AC & Heater
|
8.1/10 | Buy |
| Best Budget |
ROVSUN Smart 8,000 BTU Through the Wall Air
|
7.8/10 | Buy |
Keystone 10,000 BTU Wall Mounted AC with Heat
|
7.0/10 | Buy | |
| Best Value |
Bonnlo 8000 BTU Through the Wall Air Conditioner
|
Buy |
OLMO 8,000 BTU Through-the-Wall AC & Heater
Product description The Olmo TTW Through the Wall Unit Olmo’s “Through The Wall” air conditioning unit is a versatile and efficient cooling solution designed to seamlessly integrate into your living space. This unit combines convenience, efficiency, and comfort, all in one sleek package. Some of its great features include a remote control that allows you to change settings, adjust temperature, and switch modes from the comfort of your couch or bed. Whether you’re upgrading your home or office, Olmo has you covered, making this unit an excellent choice for any room. Olmo takes convenience to the next level with “Smart Connect” letting you control the unit remotely using your smartphone. The exclusive remote controller features include Sleep Mode, Timer, Auto Restart and a Self evaporating system. Olmo’s TTW Sleeve is available to purchase separately for easy installation. From the brand OLMO offers a range of air conditioning and heating solutions, such as ducted and ductless mini splits, Multi-positional Air Handlers, and Through The Wall systems. Known for affordability and quality, OLMO integrates cutting-edge technology to deliver reliable, energy-efficient, and user-friendly products. Our commitment to innovation ensures high SEER2 ratings, minimal noise, and effective performance, making OLMO a smart choice for any space. Through-The-Wall A/C Single Zones Multi Zones
OLMO 12,000 BTU 230V Through-the-Wall AC & Heater
Product description The Olmo TTW Through the Wall Unit Olmo’s “Through The Wall” air conditioning unit is a versatile and efficient cooling solution designed to seamlessly integrate into your living space. This unit combines convenience, efficiency, and comfort, all in one sleek package. Some of its great features include a remote control that allows you to change settings, adjust temperature, and switch modes from the comfort of your couch or bed. Whether you’re upgrading your home or office, Olmo has you covered, making this unit an excellent choice for any room. Olmo takes convenience to the next level with “Smart Connect” letting you control the unit remotely using your smartphone. The exclusive remote controller features include Sleep Mode, Timer, Auto Restart and a Self evaporating system. Olmo’s TTW Sleeve is available to purchase separately for easy installation. From the brand OLMO offers a range of air conditioning and heating solutions, such as ducted and ductless mini splits, Multi-positional Air Handlers, and Through The Wall systems. Known for affordability and quality, OLMO integrates cutting-edge technology to deliver reliable, energy-efficient, and user-friendly products. Our commitment to innovation ensures high SEER2 ratings, minimal noise, and effective performance, making OLMO a smart choice for any space. Through-The-Wall A/C Single Zones Multi Zones
ROVSUN Smart 8,000 BTU Through the Wall Air
This through-the-wall unit from ROVSUN delivers 8,000 BTU of cooling and 4,200 BTU of heating for rooms up to 350 square feet. It includes WiFi and voice control, a remote, and multiple operating modes. A good fit for anyone needing a combined AC and heater in a standard wall sleeve.
Pros
- Heats and cools for year-round use
- Smart controls with app and voice
- Fits standard 25.5-inch wall sleeve
- Washable filter for easy maintenance
Cons
- No inverter compressor
- Heavy at 62.8 lbs
- Wall sleeve not included
Keystone 10,000 BTU Wall Mounted AC with Heat
This through-the-wall unit delivers 10,000 BTU of cooling and 10,600 BTU of supplemental heat for rooms up to 450 sq ft, with a built-in dehumidifier that removes 2.3 pints per hour. It requires a 230V/20A outlet and a separate wall sleeve (not included), making installation more involved than a window unit. Suitable for small to medium spaces where a permanent solution is desired.
Pros
- Cools and heats for year-round comfort
- Built-in dehumidifier improves air quality
- Smart remote with LCD and 3-minute updates
- Energy Saver and Sleep modes cut costs
- Washable filter with maintenance alert
Cons
- Requires 230V outlet and separate wall sleeve
- Noise level of 58 dB
- Supplemental heat not for primary heating
Bonnlo 8000 BTU Through the Wall Air Conditioner
Bonnlo 8000BTU Smart Through the Wall Air Conditioner with Heat is designed for seamlessly integrating into your smart lifestyle. This quiet unit delivers versatile modes including cooling, heating, fan, and dehumidifying, all from a single space-saving device. Whether you need to beat the summer heat in your bedroom or maintain a comfortable temperature in your living room, this unit provides instant, app-controlled comfort for rooms up to 350 square feet. With its quiet operation, you can enjoy uninterrupted sleep and work without disturbing noises.The perfect blend of smart technology, quiet performance, and space-saving design, engineered for your everyday comfort.Features:1. Quiet Operation: Engineered for quiet performance. Ideal for uninterrupted sleep or focused work.2. Easy Installation: Complete mounting kit included. Fits standard wall sleeves, no professional needed.3. Washable Filter: The removable mesh filter captures airborne particles like dust. Easy to clean, just rinse and reuse.4. Smart 4-Way Control: Manage via WiFi app, remote, voice or touch panel. Compatible with Alexa and Google Assistant.5. 5 Modes for Total Comfort: Select from Cool, Heat, Fan, Dry, or Eco mode to create your ideal environment anytime.Specifications:1. Cooling Rate (BTU/hr): 8000 BTU2. Heating Rate (BTU/hr): 4200 BTU3. Recommended Coverage Area: 250-350 sq/ft4. Power Supply: 115V-60Hz5. Timer Setting: Up to 24 hours6. Temp Range: 61° F - 88° F7. Color: White8. Recommended Wall Sleeve-Width: 25.5"9. Recommended Wall Sleeve-Height: 15.25"10. Overall Dimensions: 24.21" x 20.28" x 14.53" ( L x W x H )Package Includes:1 x Air Conditioner1 x Remote Control1 x Installation Kit1 x Manual
Top 3 Through-the-Wall Air Conditioners with Heat Under $500 Reviewed
#1 OLMO 8,000 BTU Through-the-Wall AC & Heater: Best Overall
Why We Picked It
The OLMO OW-P08HS115WF is the easiest recommendation in this price range. It has a 4.2 average from 12 ratings, the lowest price among the units here, and a full smart feature set. It delivers 8,000 BTU/h of cooling and 4200 BTU/h of heating on 115V, 1 phase, 60Hz power, so it plugs into the regular outlet many older sleeves already have.
The built-in smart kit gives you app and voice control alongside the push button panel with LED display and the remote. OLMO lists 52 dB, a low figure for a heat and cool unit, and adds sleep mode, a timer, auto restart and R-32 refrigerant.
Key Specifications
- Cooling Capacity: 8,000 BTU/h
- Heating Capacity: 4200 BTU/h
- Power: 115V, 60Hz
- Noise Level: 52 dB
- Controls: Panel, remote, app, voice
- Weight: 77 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
The heater suits small rooms on cool days. Budget for a wall sleeve if you do not already have one.
Best For
This unit is best for bedrooms and home offices with a standard outlet where you want smart control at the lowest cost.
Check the current price and availability of the OLMO 8,000 BTU Through-the-Wall AC & Heater on Amazon.
Read our full OLMO 8,000 BTU Through-the-Wall AC & Heater review.
#2 OLMO 12,000 BTU 230V Through-the-Wall AC & Heater: Best for Strong Heat
Why We Picked It
The OLMO OW-P12HS230WF is the most heat you can get in this price range. It is rated at 12,000/11,700 BTU/h of cooling and 10,600/8,600 BTU/h of heating at 230 and 208 volts, more than double the heat of the 115 volt units here. It also has a 4.2 average from 13 ratings.
Like the smaller OLMO, it has a built-in smart kit for app and voice control, plus a push button panel with LED display and a remote. Sleep mode, a timer, auto restart and a self evaporating system cover the basics, and it uses R-32 refrigerant. OLMO lists 58 dB.
Key Specifications
- Cooling Capacity: 12,000/11,700 BTU/h
- Heating Capacity: 10,600/8,600 BTU/h
- Power: 208/230V, 60Hz
- Noise Level: 58 dB
- Smart Control: App and voice
- Weight: 85.8 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
OLMO does not publish a room size. At 12,000 BTU, the ENERGY STAR chart points to rooms of about 450 to 550 square feet.
Best For
This unit is best for living rooms and studios with a 230 volt outlet that need real heat on cool days.
Check the current price and availability of the OLMO 12,000 BTU 230V Through-the-Wall AC & Heater on Amazon.
Read our full OLMO 12,000 BTU 230V Through-the-Wall AC & Heater review.
#3 ROVSUN Smart 8,000 BTU Through the Wall Air Conditioner with Heat: Most Proven Smart Pick
Why We Picked It
The ROVSUN Smart 8,000 BTU has the most feedback in this guide, a 4.0 average from 48 ratings shared with ROVSUN’s larger smart sizes. It pairs 8000 BTU of cooling with a 4200 BTU heater for rooms up to 350 square feet and runs on a standard 115V outlet.
It has the widest mode list here: Heat, Auto, Cool, Dry and Fan. Auto mode switches between heating and cooling to hold the set temperature. You also get three fan speeds plus auto, a 24 hour timer, an ECO saver, a swing button for the louvers, and app, Alexa and Google Assistant control. It fits a standard 25.5 by 15.25 inch sleeve and includes a trim kit and back grille.
Key Specifications
- Cooling Capacity: 8000 BTU
- Heating Capacity: 4200 BTU
- Room Size: Up to 350 sq ft
- Power: 115V, 1027 watts
- Noise Level: 61 dB on high
- Weight: 62.8 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
ROVSUN lists 61, 59 and 57 dB on high, medium and low. In a bedroom, plan to use the low speed at night.
Best For
This unit is best for renters who want a proven smart heat and cool unit for a small room on a standard outlet.
Check the current price and availability of the ROVSUN Smart 8,000 BTU Through the Wall Air Conditioner with Heat on Amazon.
Read our full ROVSUN Smart 8,000 BTU Through the Wall Air Conditioner with Heat review.
Other Models Worth Considering
Keystone 10,000 BTU Wall Mounted AC with Heat (KSTAT10-2HD). A 230 volt unit for rooms up to 450 square feet with a 10,600 BTU supplemental heater and up to 2.3 pints per hour of dehumidifying. Its remote reads the temperature where you sit, and Keystone covers the sealed system for 4 more years on top of 1 year parts and labor. It lists 58 dB and has a 3.5 average from 24 ratings.
Bonnlo 8000 BTU Through the Wall Air Conditioner with Heat (BL-Wall AC-Heat-8k). A 115 volt smart unit with 8,000 BTU of cooling and 4,200 BTU of heating for rooms up to 350 square feet. It offers 4 fan speeds, an ECO mode, app and voice control with Alexa and Google Assistant, and an installation kit for standard sleeves. It is new and has no ratings yet.
What to Expect from Through-the-Wall Air Conditioners with Heat Under $500
In this price range, the main trade-off is between heat and power. The 115 volt units plug into a regular outlet but carry small heaters for small rooms. The 230 volt units need the right receptacle but offer heaters strong enough for a living room. Smart control is surprisingly common, so you do not have to give up app and voice features to stay on budget. Most units here do not include a wall sleeve.
For more choices, see our guides to through-the-wall air conditioners with heat in the next price tier and 115V through-the-wall air conditioners with heat. The product cards show the current price for each unit.
How to Choose a Through-the-Wall Air Conditioner with Heat Under $500
Size the Unit to the Room
ENERGY STAR publishes this general guide for sizing a room air conditioner by floor area:
| Room Size (sq ft) | Cooling Capacity (BTU/hr) |
|---|---|
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
Reduce capacity by 10 percent for a heavily shaded room, increase it by 10 percent for a very sunny room, add 600 BTU for each regular occupant beyond two, and add 4,000 BTU if the unit cools a kitchen. Source: ENERGY STAR.
Count the Total Cost
Most units here ship without a wall sleeve. If you are installing in a new opening or the old sleeve is rusted, add the cost of a sleeve to the price of the unit. If you need a new 230 volt receptacle, add the cost of an electrician as well.
Check the Outlet
The OLMO 8,000 BTU, ROVSUN and Bonnlo run on a standard 115 volt outlet. The OLMO 12,000 BTU and Keystone need a 230 volt receptacle, and Keystone calls for a 20 amp outlet. Match the plug exactly and never use an adapter.
Weigh Track Record Against Features
The ROVSUN has the most ratings, and the two OLMO units have the highest averages. The Bonnlo has an attractive feature list but no ratings yet, so it carries more risk.
How We Evaluate Through-the-Wall Air Conditioners with Heat Under $500
We rank heat and cool wall units on manufacturer specifications, listing details and aggregated buyer ratings. For this list we kept only through-the-wall chassis with a heat mode that were listed under $500 when we compared them, and excluded cooling-only units, window units and bare sleeves. We weighed cooling, heating output and buyer feedback first, giving more weight to ratings from larger numbers of buyers, then compared noise, power needs, smart features and warranty.
Frequently Asked Questions
What is the best through-the-wall air conditioner with heat under $500?
The OLMO 8,000 BTU Through-the-Wall AC & Heater, for its rating, smart kit and 52 dB listing.
Which one has the strongest heater?
The OLMO 12,000 BTU unit, with 10,600/8,600 BTU/h of heat.
Are there smart wall units with heat under $500?
Yes. Both OLMO units, the ROVSUN and the Bonnlo offer app and voice control.
Which ones run on a standard outlet?
The OLMO 8,000 BTU, the ROVSUN Smart 8,000 BTU and the Bonnlo 8000 BTU run on 115 volt power.
Final Verdict
The OLMO 8,000 BTU Through-the-Wall AC & Heater is the best through-the-wall air conditioner with heat under $500 for most small rooms, with a smart kit, a 52 dB listing and a strong rating. For the most heat on a 230 volt outlet, choose the OLMO 12,000 BTU 230V Through-the-Wall AC & Heater. For the longest track record among smart units, the ROVSUN Smart 8,000 BTU Through the Wall Air Conditioner with Heat is the pick.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.