Stay comfortable year-round with a through the wall air conditioner with heater 115 volt, combining powerful cooling and efficient heating in one sleek unit. Designed for easy installation in standard wall sleeves, these all-in-one systems deliver reliable climate control without the hassle of separate heating and cooling solutions. Perfect for apartments, offices, and small homes, they offer energy-efficient operation, quiet performance, and precise temperature control—all on a standard 115-volt circuit.

Key Takeaways

• Choose 115V models for standard home outlets and easy installation.
• Look for built-in heaters to enjoy year-round climate control.
• Prioritize energy efficiency to reduce electricity bills and environmental impact.
• Ensure proper wall sleeve fit for secure, leak-free operation.
• Opt for quiet operation under 60 dB for undisturbed comfort.
• Select units with remote controls for convenient temperature adjustments.

Best Through the Wall Air Conditioner with Heater 115 Volt for Year-Round Comfort

Let’s be honest—finding the right heating and cooling solution for your home can feel like trying to solve a puzzle with missing pieces. You want something reliable, energy-efficient, and powerful enough to keep you comfortable whether it’s a sweltering July afternoon or a chilly December evening. And if you’re like many homeowners, especially those in older houses or apartments without central HVAC systems, you’ve probably considered a through the wall air conditioner with heater 115 volt.

These units are a game-changer for year-round comfort. They’re compact, self-contained, and designed to fit snugly into a wall opening, delivering both cooling in the summer and heating in the winter—all from a single, efficient appliance. And because they run on standard 115-volt household current, they’re accessible for most homes without requiring costly electrical upgrades. Whether you’re cooling a bedroom, a sunroom, or a small living space, a 115-volt through-the-wall AC with heat can be the perfect all-in-one solution.

Why Choose a Through the Wall Air Conditioner with Heater?

When it comes to heating and cooling individual rooms, you’ve got options: window units, portable ACs, mini-splits, and through-the-wall systems. But if you’re looking for a permanent, reliable, and space-saving solution, through-the-wall units stand out—especially when they include a built-in heater and run on 115 volts.

Unlike window units, which can block natural light and make your room feel cramped, through-the-wall models are installed flush with the wall, leaving your windows free and your space feeling open. They’re also more secure and weather-resistant, with fewer drafts and better insulation. And because they’re hardwired or plugged into a dedicated outlet, they tend to be more stable and less prone to tipping or shifting than portable units.

The real magic, though, is the dual functionality. A through the wall air conditioner with heater 115 volt gives you cooling power when temperatures soar and warmth when the mercury drops—no need to buy, store, or switch between separate appliances. This makes them ideal for climates with mild to moderate seasonal changes, or for rooms that aren’t connected to your home’s central heating and cooling system.

Perfect for Small Spaces and Supplemental Use

These units shine in spaces where central HVAC isn’t practical. Think guest rooms, home offices, sunrooms, garages, or even older homes with radiators that struggle to keep up. A 115-volt model is especially useful because it plugs into a standard outlet—no need for a 220-volt circuit like some larger units require.

For example, imagine you’ve converted your basement into a cozy home theater. It’s cool in the summer but gets drafty in winter. A through-the-wall AC with heat can keep the space comfortable year-round without running ductwork or relying on space heaters that eat up energy and pose fire risks.

Energy Efficiency and Cost Savings

Modern through-the-wall units are designed with energy efficiency in mind. Many come with ENERGY STAR ratings, meaning they use less electricity to deliver the same cooling and heating performance as older models. This translates to lower utility bills and a smaller carbon footprint.

Let’s say you’re cooling a 300-square-foot bedroom. A typical 115-volt through-the-wall unit with 8,000 to 10,000 BTUs can handle that space comfortably. Compared to running a window AC all summer and a space heater all winter, a single dual-function unit can save you hundreds of dollars over time—especially if you use a programmable thermostat or smart features to optimize usage.

Key Features to Look for in a 115-Volt Through the Wall AC with Heater

Not all through-the-wall air conditioners with heaters are created equal. To get the best performance, comfort, and longevity, it’s important to know what features matter most. Here’s what to look for when shopping for your ideal unit.

BTU Rating and Room Size Compatibility

BTUs (British Thermal Units) measure cooling power. The higher the BTU rating, the larger the space the unit can effectively cool or heat. For a 115-volt unit, you’ll typically find models ranging from 6,000 to 12,000 BTUs.

• 6,000–8,000 BTUs: Best for rooms up to 300 square feet (e.g., small bedrooms, home offices)
• 8,000–10,000 BTUs: Ideal for 300–400 square feet (e.g., medium bedrooms, sunrooms)
• 10,000–12,000 BTUs: Suitable for 400–500 square feet (e.g., large bedrooms, small living rooms)

Choosing the right size is crucial. A unit that’s too small will struggle to cool or heat your space, running constantly and driving up energy bills. One that’s too large will cycle on and off too frequently, reducing efficiency and potentially causing humidity issues.

Heating Capacity and Efficiency

While cooling is straightforward, heating performance can vary. Most 115-volt through-the-wall units use electric resistance heating (similar to a space heater), which is reliable but can be energy-intensive. Look for models with high heating wattage—typically between 1,200 and 3,500 watts—to ensure they can keep up on colder days.

Some units also feature heat pumps, which are more energy-efficient than electric resistance heating. However, heat pumps on 115-volt models are less common and may have lower heating capacity in very cold climates. If you live in a region with mild winters, a heat pump model could save you money. But if temperatures regularly dip below 40°F, electric resistance heating might be more dependable.

Energy Efficiency Ratio (EER) and ENERGY STAR Certification

The Energy Efficiency Ratio (EER) measures how efficiently a unit uses electricity to cool a space. A higher EER means better efficiency. For 115-volt through-the-wall units, look for an EER of 10 or higher.

ENERGY STAR certification is another strong indicator of efficiency. ENERGY STAR-qualified models meet strict guidelines set by the U.S. Environmental Protection Agency and can reduce energy use by up to 15% compared to standard models. Over time, this can add up to significant savings.

Noise Level and Comfort

Nobody wants a noisy unit disrupting their sleep or concentration. Look for models with low decibel (dB) ratings—ideally under 60 dB on the high setting. Many manufacturers now offer “quiet mode” or “sleep mode” features that reduce fan speed and noise at night.

For example, the Frigidaire FHPW102AC1 operates at just 52 dB on low, making it one of the quietest options on the market. That’s quieter than a normal conversation and perfect for bedrooms or offices.

Smart Features and Controls

Modern units often come with digital thermostats, remote controls, and even Wi-Fi connectivity. These features let you adjust temperature, set schedules, and monitor energy use from your phone or voice assistant.

Imagine coming home on a hot day and having your room already cooled to your preferred temperature because your unit followed your daily schedule. Or adjusting the heat from bed without getting up. These conveniences not only improve comfort but also help you use energy more wisely.

Top Picks: Best Through the Wall Air Conditioners with Heater (115 Volt)

After researching and comparing dozens of models, here are some of the best through the wall air conditioners with heater that run on 115 volts. Each offers a balance of performance, efficiency, and user-friendly features.

1. Frigidaire FHPW102AC1 – Best Overall

The Frigidaire FHPW102AC1 is a top contender for anyone seeking reliable year-round comfort. With 10,000 BTUs of cooling power and 3,500 watts of heating, it’s perfect for rooms up to 450 square feet. It features a washable filter, three cooling speeds, three fan speeds, and a programmable 24-hour timer.

What sets it apart is its quiet operation—just 52 dB on low—and its ENERGY STAR certification. It also includes a remote control and electronic controls with a digital display. Installation is straightforward with a standard wall sleeve, and it’s compatible with most existing through-the-wall openings.

2. LG LT1016CER – Best for Smart Homes

If you love smart technology, the LG LT1016CER is a standout. This 10,000 BTU unit includes Wi-Fi connectivity, allowing you to control it via the LG ThinQ app or voice commands through Alexa or Google Assistant. You can set schedules, receive filter change alerts, and even monitor energy usage.

It also features a 4-in-1 operation: cool, heat, fan, and dehumidify. The heating capacity is 3,500 watts, and it has an EER of 11.7, making it highly efficient. The unit is ENERGY STAR certified and includes a remote and digital controls.

3. Keystone KSTAT10-115 – Best Budget Option

For those on a tighter budget, the Keystone KSTAT10-115 offers solid performance at an affordable price. It delivers 10,000 BTUs of cooling and 3,500 watts of heating, suitable for rooms up to 450 square feet. It includes three cooling and fan speeds, a 24-hour timer, and a remote control.

While it doesn’t have smart features or the quietest operation (around 62 dB), it’s a reliable workhorse that gets the job done. It’s also ENERGY STAR certified and easy to install with a standard wall sleeve.

4. GE AHY10LZ – Best for Quiet Operation

The GE AHY10LZ is another excellent choice, especially if noise is a concern. With 10,000 BTUs and 3,500 watts of heating, it’s powerful yet quiet—operating at just 53 dB on low. It features electronic controls, a remote, and a 24-hour timer.

It also includes a “Smart Fan” feature that automatically adjusts fan speed based on cooling demand, improving efficiency and comfort. The unit is ENERGY STAR certified and compatible with most standard wall sleeves.

Installation Tips and What to Expect

Installing a through the wall air conditioner with heater 115 volt isn’t as simple as plugging in a window unit, but it’s definitely doable with the right preparation. Here’s what you need to know to ensure a smooth installation.

Measure Your Wall Opening

Before buying, measure the width, height, and depth of your existing wall sleeve or the space where you plan to install the unit. Most through-the-wall units require a sleeve that’s around 26 inches wide, 15–16 inches high, and 16–20 inches deep. If you’re installing in a new location, you’ll need to cut through the wall and frame the opening properly.

Pro tip: Check the manufacturer’s specifications for exact dimensions. Some models are designed to fit standard sleeves, while others may require custom installation.

Electrical Requirements

Even though these units run on 115 volts, they still draw significant current—often 12–15 amps. This means they should be plugged into a dedicated circuit to avoid tripping breakers. If your outlet is shared with other appliances, consider having an electrician install a new dedicated outlet.

Also, make sure the outlet is grounded and meets local electrical codes. Never use an extension cord—these units should be plugged directly into the wall.

Sealing and Insulation

Once the unit is in place, it’s crucial to seal the gaps around the sleeve to prevent air leaks, drafts, and moisture intrusion. Use foam insulation tape or caulk to seal the interior and exterior edges. This not only improves efficiency but also helps keep pests out.

For added protection, consider installing an exterior weatherproof cover when the unit is not in use (e.g., during off-seasons in mild climates). This extends the life of the unit and keeps debris out.

Professional vs. DIY Installation

If you’re comfortable with basic carpentry and electrical work, you can install the unit yourself. However, if you’re cutting into an exterior wall for the first time or dealing with electrical wiring, it’s wise to hire a professional. Improper installation can lead to structural issues, air leaks, or even electrical hazards.

Many HVAC contractors offer through-the-wall installation services and can ensure the job is done safely and up to code.

Maintenance and Longevity: Keeping Your Unit Running Smoothly

A well-maintained through the wall air conditioner with heater 115 volt can last 10–15 years or more. Regular care not only extends its life but also ensures optimal performance and energy efficiency.

Clean or Replace the Air Filter Monthly

The air filter traps dust, pollen, and other particles. A dirty filter restricts airflow, forcing the unit to work harder and use more energy. Check the filter every month during peak usage and clean or replace it as needed. Most models have washable filters that can be rinsed under water and reused.

Clean the Coils and Interior

Over time, the evaporator and condenser coils can accumulate dirt and debris, reducing efficiency. Turn off the power and use a soft brush or vacuum with a brush attachment to gently clean the coils. Avoid using water or harsh chemicals.

Also, wipe down the interior cabinet and remove any buildup around the fan blades. This helps prevent odors and maintains airflow.

Inspect the Drainage System

Through-the-wall units produce condensation during cooling. Make sure the drain hole is clear and water can flow freely. If the unit leaks or pools water inside, it could indicate a clogged drain or improper installation slope.

Schedule Annual Professional Maintenance

Once a year, consider having a technician inspect your unit. They can check refrigerant levels, test electrical connections, clean internal components, and ensure everything is running safely and efficiently.

Energy Efficiency Comparison: Top 115V Through-the-Wall ACs with Heat

Model	BTU (Cooling)	Heating (Watts)	EER	ENERGY STAR	Noise Level (dB)	Smart Features
Frigidaire FHPW102AC1	10,000	3,500	11.7	Yes	52	No
LG LT1016CER	10,000	3,500	11.7	Yes	54	Yes (Wi-Fi)
Keystone KSTAT10-115	10,000	3,500	11.0	Yes	62	No
GE AHY10LZ	10,000	3,500	11.2	Yes	53	No

Final Thoughts: Is a 115-Volt Through the Wall AC with Heater Right for You?

Choosing the right heating and cooling solution is about more than just temperature control—it’s about comfort, convenience, and long-term value. A through the wall air conditioner with heater 115 volt offers a practical, efficient, and space-saving way to keep your room comfortable all year long.

These units are ideal for homeowners who want a permanent solution without the complexity of ductwork or the limitations of window units. They’re especially useful in older homes, additions, or rooms that aren’t served by central HVAC. And with modern features like smart controls, quiet operation, and high energy efficiency, they’re more advanced than ever.

When shopping, focus on BTU rating, heating capacity, energy efficiency, and noise level. Consider your room size, climate, and how much you value smart features. And don’t skip proper installation and maintenance—these steps are key to getting the most out of your investment.

Whether you’re cooling a bedroom in summer or warming a home office in winter, a 115-volt through-the-wall AC with heat can deliver reliable, year-round comfort. It’s not just an appliance—it’s peace of mind, season after season.

Frequently Asked Questions

What is the best through the wall air conditioner with heater 115 volt for year-round comfort?

The best through the wall air conditioner with heater 115 volt combines efficient cooling and heating in one unit, ideal for moderate climates. Models like the Frigidaire FHTE103WA1 or LG LW1216HR offer reliable performance, energy efficiency, and quiet operation for consistent indoor comfort.

Can a 115-volt through the wall AC with heater run on a standard household outlet?

Yes, a 115-volt through the wall air conditioner with heater can typically run on a standard 120-volt household outlet, but it requires a dedicated circuit to handle the electrical load. Always check the manufacturer’s specifications to ensure proper wiring and breaker requirements.

Do through the wall air conditioners with heaters require special installation?

Yes, these units require a properly sized wall sleeve or opening for secure and weather-tight installation. Professional installation is recommended to ensure correct fit, insulation, and electrical connections for safety and optimal performance.

Are 115-volt through the wall AC units with heaters energy efficient?

Many 115-volt through the wall air conditioners with heaters feature energy-saving modes, programmable timers, and high EER ratings for improved efficiency. Look for ENERGY STAR certified models to reduce electricity usage and lower utility bills.

Can I use a through the wall air conditioner with heater in winter?

Yes, most through the wall air conditioners with heaters include a built-in electric heating element, making them suitable for winter use. They provide supplemental warmth and are ideal for maintaining comfort during colder months without needing a separate heater.

What size through the wall AC with heater do I need for my room?

Choose a unit based on room size—typically, 5,000 to 10,000 BTUs for rooms up to 450 square feet. Use the manufacturer’s sizing guide or consult an HVAC professional to ensure your through the wall air conditioner with heater delivers adequate cooling and heating.