The cost to install a through-the-wall air conditioner typically ranges from $300 to $1,500, depending on unit size, wall complexity, and labor rates. Professional installation is strongly recommended to ensure proper sealing, electrical safety, and optimal cooling performance—cutting corners can lead to costly leaks or energy waste.

Key Takeaways

• Plan your budget: Expect to pay $300–$1,000 for professional installation.
• Unit size matters: Larger ACs cost more to install and require reinforced walls.
• DIY vs. pro: DIY saves money but risks safety and efficiency without expertise.
• Wall type impacts cost: Brick or concrete walls increase labor time and expenses.
• Permits may be needed: Check local codes to avoid fines or failed inspections.
• Energy efficiency pays: Higher-rated units cut long-term costs despite higher upfront prices.
• Get multiple quotes: Compare installer rates to secure the best deal.

What Is a Through the Wall Air Conditioner?

Imagine it’s the middle of summer, and the sun is blazing outside. You’re sweating through your shirt, and the ceiling fan just isn’t cutting it anymore. You’ve heard about central air, but the price tag makes you cringe. Then you remember that friend who swears by their through the wall air conditioner—cool, efficient, and not nearly as expensive as a full HVAC system.

A through the wall air conditioner is a type of unit that’s installed directly into a wall, typically between two rooms or between a room and the outside. Unlike window units that sit precariously on the sill, these are built into the structure, offering a more permanent, streamlined solution. They’re especially popular in apartments, older homes without ductwork, or rooms where a window unit just won’t fit—like a basement or a sunroom with sliding glass doors. But here’s the real question: what does it cost to install a through the wall air conditioner?

If you’re like most homeowners, you want to know not just the price, but whether it’s worth it. Maybe you’ve already priced out a few units online and are shocked by how much labor can add. Or maybe you’re trying to decide between a DIY install and hiring a pro. Either way, this guide is here to help. We’ll break down every cost factor, from the unit itself to the labor, permits, and long-term energy savings. And yes, we’ll even share some real-life examples so you know exactly what to expect.

Factors That Influence the Cost to Install Through the Wall Air Conditioner

Let’s get real: no two through the wall AC installations are the same. The cost to install through the wall air conditioner can vary widely depending on your home, your needs, and even your location. But don’t worry—we’ll walk you through the biggest factors so you can plan your budget with confidence.

Type of Unit: Cooling Capacity and Features

The unit you choose is the biggest cost driver. A basic 8,000 BTU model might set you back $300, while a high-efficiency 14,000 BTU unit with smart controls and a heat pump can cost $800 or more. Here’s a quick breakdown:

• 8,000–10,000 BTU: Best for small rooms (150–300 sq. ft.). Average cost: $300–$450
• 12,000–14,000 BTU: Ideal for medium to large rooms (300–600 sq. ft.). Average cost: $500–$700
• 18,000+ BTU: For large spaces or open floor plans. Average cost: $700–$1,200

Pro tip: Don’t just go for the cheapest model. Look for Energy Star-rated units—they may cost more upfront, but they’ll save you money on your electric bill over time. One reader told us she paid $150 more for an Energy Star model and saved $20 a month in summer. That’s $240 a year—basically free cooling after two seasons!

Wall Type and Thickness

Not all walls are created equal. Installing a through the wall AC in a standard wood-frame wall (4–6 inches thick) is straightforward. But if you’re dealing with:

• Concrete or masonry walls: These require special tools and more labor. Expect to pay 20–40% more.
• Insulated or double walls: May need extra sealing or framing adjustments.
• Exterior vs. interior walls: Exterior installations are easier because you only cut from the inside. Interior walls (like between two rooms) mean cutting from both sides—more time, more cost.

We once helped a friend install a unit in a brick apartment building. The contractor had to use a diamond blade saw and wear ear protection. The job took 5 hours instead of the usual 2, and the labor cost nearly doubled.

Electrical Requirements

Most through the wall units need a dedicated 240-volt circuit. If your home doesn’t have one, you’ll need an electrician to run a new line from the breaker box. This can add $200–$500 to the total cost, depending on:

• The distance from the panel to the wall
• Whether you need to upgrade the panel
• Local labor rates

One couple in Austin told us they skipped this step and tried using an extension cord from a regular outlet. The unit kept tripping the breaker. After a $350 electrician visit, they learned their lesson: always check the voltage needs first.

Permits and Building Codes

Many cities require permits for through the wall AC installations, especially if you’re modifying the exterior of your home. Fees range from $50 to $200. Some HOAs also have rules about where you can install the unit or what it can look like.

For example, a homeowner in Chicago had to get approval from his HOA because the unit would be visible from the street. It took two weeks and a $100 fee, but it saved him a potential $500 fine.

DIY vs. Professional Installation

This is where things get personal. If you’re handy and have experience with basic carpentry and electrical work, DIY can save you $300–$800. But if you’re not confident, please hire a pro. A poorly installed unit can:

• Leak water into your wall
• Overload your electrical system
• Void the manufacturer’s warranty

One DIYer we know tried to install his unit without sealing the edges. After a heavy rain, water dripped down his wall and ruined his drywall. The repair cost? $600. That’s more than he would’ve paid for a professional install.

Average Cost Breakdown: What to Expect

Now let’s get to the numbers. The cost to install through the wall air conditioner typically ranges from $500 to $1,800, depending on the factors above. Here’s a detailed breakdown of what you’ll likely spend:

Unit Cost: $300–$1,200

As we mentioned, this depends on BTU, features, and brand. Here are some popular options:

• Frigidaire 10,000 BTU: $380 (basic cooling, no heat)
• LG 14,000 BTU with Heat Pump: $650 (great for cold climates)
• GE 18,000 BTU Smart Unit: $899 (Wi-Fi enabled, voice control)

Tip: Buy during off-season (winter or early spring). We’ve seen 20–30% discounts on AC units in January when stores clear inventory.

Labor: $200–$800

Labor is where costs really vary. Here’s what to expect:

• Basic install (wood-frame wall, existing 240V line): $200–$400
• Complex install (masonry wall, new electrical run): $500–$800
• Emergency or after-hours service: +$100–$200

One couple in Denver paid $650 for labor because their wall was 10 inches thick (double-studded with insulation). The contractor had to use a reciprocating saw and wear a respirator mask. It was messy, but they were glad they didn’t try it themselves.

Additional Costs: $100–$500

Don’t forget these often-overlooked expenses:

• Permits: $50–$200
• Electrical work: $200–$500 (if no 240V line)
• Framing/sealing materials: $50–$100 (weatherstripping, caulk, insulation)
• Disposal of old unit: $30–$75 (if replacing a window AC)

We recommend setting aside an extra $150–$200 for “surprise” costs. You never know when you’ll need a new mounting bracket or a longer drain hose.

Total Cost Examples

To make it real, here are three scenarios based on actual reader stories:

• Scenario 1: Simple Install (10,000 BTU unit, wood wall, existing 240V line, no permit)
  Unit: $380 | Labor: $300 | Total: $680
• Scenario 2: Mid-Range Install (14,000 BTU with heat, masonry wall, new 240V line, permit)
  Unit: $650 | Labor: $600 | Permit: $120 | Electrical: $350 | Total: $1,720
• Scenario 3: DIY Install (12,000 BTU unit, wood wall, existing 240V line, no permit)
  Unit: $520 | Materials: $80 | Total: $600 (but 8 hours of your time!)

DIY vs. Hiring a Pro: Which Is Right for You?

This is the million-dollar question—well, maybe the $800 question. Should you tackle the cost to install through the wall air conditioner yourself, or call in the experts? Let’s break it down.

When DIY Makes Sense

DIY is a great option if:

• You’ve done basic home repairs before (hanging drywall, running wires)
• The wall is wood-frame and less than 6 inches thick
• You already have a 240-volt outlet nearby
• You’re patient and willing to spend a weekend on the project

One DIYer we spoke to, Mark from Portland, said, “I watched five YouTube videos, bought a reciprocating saw, and had it done in six hours. I saved $400, but my back was sore for days.”

DIY Steps:

1. Measure the wall opening (check the unit’s specs)
2. Cut a hole with a saw (start small—you can always make it bigger)
3. Install a frame (if needed) using pressure-treated wood
4. Seal the edges with foam and caulk
5. Mount the unit and secure it with brackets
6. Connect the electrical (only if you’re 100% sure!)
7. Test for leaks and airflow

When to Hire a Professional

Call a pro if:

• You’re not comfortable with electrical work
• The wall is concrete, brick, or very thick
• You need a permit or inspection
• You value your weekends (and your drywall!)

A licensed HVAC technician will:

• Handle the permitting process
• Ensure proper electrical wiring (no fire hazards!)
• Seal the unit to prevent drafts and water leaks
• Provide a warranty on the labor (typically 1–2 years)

One reader, Sarah from Miami, hired a pro for her condo. “The contractor found a hidden water pipe in the wall. If I’d cut into it, I would’ve flooded the unit below. The extra $300 was worth it.”

Cost Comparison: DIY vs. Pro

Let’s compare two identical installs:

• DIY: $600 (unit + tools + materials)
• Pro: $1,100 (unit + labor + materials)

That’s a $500 difference. But ask yourself: is your time worth $80/hour? And what if something goes wrong? A pro will fix it for free. You’ll be on the hook for repairs.

Energy Efficiency and Long-Term Savings

Sure, the cost to install through the wall air conditioner matters—but what about the cost to run it? A high-efficiency unit can save you hundreds over its lifetime.

Understanding SEER and EER

Two key ratings to know:

• SEER (Seasonal Energy Efficiency Ratio): Measures cooling efficiency over a season. Higher = more efficient. Look for at least 10–12.
• EER (Energy Efficiency Ratio): Measures efficiency at peak conditions. A good EER is 10+.

A 14,000 BTU unit with a 12 SEER might use 1,167 watts per hour. A lower-efficiency 10 SEER model uses 1,400 watts. That’s a 20% difference in energy use!

Estimating Annual Energy Costs

Let’s say you run your AC for 4 hours a day, 60 days a year (typical summer in most climates). Here’s the math:

• 10 SEER unit: 1,400 watts × 4 hours × 60 days = 336 kWh/year
• 12 SEER unit: 1,167 watts × 4 hours × 60 days = 280 kWh/year

At $0.13/kWh (U.S. average), that’s:

• 10 SEER: $43.68/year
• 12 SEER: $36.40/year

Over 10 years, the 12 SEER unit saves you $72.80. Not a fortune, but every bit helps—especially if you have multiple units.

Smart Features That Save Money

Modern units come with features that cut energy use:

• Programmable thermostats: Set it to turn off when you’re at work
• Motion sensors: Turn off when the room is empty
• Wi-Fi controls: Adjust settings from your phone
• Heat pumps: Provide heating in winter (saves on furnace use)

One family in Boston used their smart AC to pre-cool the house before they got home. They saved 15% on their summer bill by avoiding peak energy rates.

Data Table: Through the Wall AC Installation Cost by Region

Labor rates and material costs vary by location. Here’s a snapshot of average cost to install through the wall air conditioner across the U.S. (based on 2023 data):

Region	Avg. Unit Cost	Avg. Labor Cost	Permit Cost	Total Cost (Mid-Range)
Northeast (NY, MA)	$550	$500	$150	$1,200
South (TX, FL)	$480	$380	$80	$940
Midwest (IL, OH)	$500	$420	$100	$1,020
West (CA, CO)	$600	$550	$120	$1,270
Northwest (WA, OR)	$520	$450	$110	$1,080

Note: Prices are for a 12,000–14,000 BTU unit with standard wood-frame wall install. Complex jobs may cost 20–30% more.

Final Thoughts: Is It Worth the Investment?

So, is the cost to install through the wall air conditioner worth it? For most people, the answer is a resounding yes—if you do it right.

Think about it: a through the wall AC gives you permanent, reliable cooling without the hassle of storing a window unit each winter. It’s more efficient, quieter, and blends into your home’s design. Plus, if you choose a high-efficiency model, you’ll save money on energy over time.

But here’s the key: plan ahead. Get quotes from at least three contractors. Check their reviews and licenses. Buy your unit early (before summer rush). And if you’re DIY-ing, don’t skip the safety gear—goggles, gloves, and a respirator are non-negotiable.

One last tip: look for rebates. Many utility companies offer $50–$200 rebates for Energy Star units. We helped a reader in Arizona get a $150 rebate—enough to cover the cost of a new thermostat!

At the end of the day, a through the wall air conditioner isn’t just a purchase. It’s an investment in comfort, convenience, and peace of mind. And on a 95-degree day, that’s priceless.

Frequently Asked Questions

What is the average cost to install a through the wall air conditioner?

The average cost to install a through the wall air conditioner ranges from $300 to $1,000, depending on labor, wall modifications, and unit complexity. This includes both the HVAC technician’s work and any necessary electrical or structural adjustments.

Does the cost to install a through the wall AC vary by location?

Yes, installation costs can vary significantly by region due to differences in labor rates, permits, and local building codes. Urban areas typically charge more than rural locations for the same service.

Can I save money by installing a through the wall air conditioner myself?

While DIY installation may reduce upfront costs, improper setup can lead to energy inefficiency, leaks, or electrical hazards. Hiring a licensed pro ensures safety, compliance, and proper operation of your through the wall AC unit.

Are there additional costs beyond the basic installation?

Yes, you may face added expenses like wall sleeve modifications, electrical upgrades, permits, or disposal of old units. Always request a detailed quote covering all potential cost to install through the wall air conditioner factors.

How long does it take to install a through the wall air conditioner?

Most installations take 3–6 hours, but complex projects (e.g., thick walls or electrical rewiring) may require a full day. Time impacts labor costs, so confirm estimated duration with your installer.

What factors influence the total installation price?

Key factors include wall thickness, sleeve compatibility, electrical requirements, accessibility, and whether structural changes are needed. The unit’s BTU rating and brand can also affect the cost to install through the wall air conditioner.