Can You Install a Through-the-Wall AC Yourself? A Step-by-Step Guide

🏠 Introduction: DIY or Professional? The Big Question

Through-the-wall (TTW) air conditioners like the Amana 11,600 BTU PBC122J00AA are an excellent long-term cooling solution. But many homeowners wonder: can I install it myself? While DIY installation is possible for some, it comes with serious considerations related to safety, structure, and long-term performance.

This guide walks you through every step of TTW AC installation, helping you determine if it’s a project you can handle or one best left to the pros.

⚠️ Quick Disclaimer: Know Your Limits

Before you pick up tools, understand that cutting into an exterior wall requires knowledge of:

• Load-bearing structures

• Electrical wiring

• Permits and code compliance

When in doubt, consult a licensed HVAC technician or contractor 

🧰 Tools & Materials Checklist

• Wall sleeve (e.g., Amana WS900E Sleeve)

• Stud finder

• Drill & drill bits

• Reciprocating saw or circular saw

• Level

• Measuring tape

• Insulation (foam sealant)

• Exterior flashing/tape

• Caulk gun and waterproof sealant

• Safety glasses & gloves

• Screwdrivers

• Dedicated 115V electrical outlet (consult electrician if needed)

📝 Step 1: Site Selection

Choose a wall that:

• Has unobstructed outdoor clearance (at least 12-24 inches)

• Is free of electrical wiring or plumbing

• Allows proper drainage slope

• Avoids load-bearing walls (unless structurally evaluated)

Reference The Furnace Outlet Amana Product Specs for sleeve dimensions.

📐 Step 2: Mark & Measure

1. Use stud finder to locate wall studs.

2. Outline sleeve opening between studs.

3. Double-check measurements to match your wall sleeve.

4. Mark slightly larger than sleeve size to allow for adjustments.

Example: WS900E Sleeve requires ~26” W x 16” H cutout.

🔪 Step 3: Cutting the Opening

Interior Side:

• Use drill to create pilot holes at corners.

• Cut along lines using reciprocating saw.

Exterior Side:

• Repeat cut process from outside.

• Remove insulation carefully.

Important: Support wall integrity during cutting. Avoid damaging structural framing.

For detailed cutting visuals, check Lowe’s Wall AC Install Tutorial.

🏗 Step 4: Install Wall Sleeve

1. Insert wall sleeve into opening.

2. Ensure proper tilt (slight outward slope for drainage).

3. Use shims for leveling if needed.

4. Secure sleeve to framing studs.

5. Seal gaps with insulation foam.

Proper sleeve installation prevents water intrusion and noise vibration (Energy Star Best Practices).

🔌 Step 5: Electrical Setup

• The Amana PBC122J00AA uses a 115V outlet.

• Ensure outlet is grounded and rated for AC load.

• Avoid extension cords.

• If wiring is needed, hire a licensed electrician (National Electrical Contractors Association).

🌧 Step 6: Exterior Sealing & Flashing

• Apply waterproof sealant around sleeve edges.

• Add exterior flashing tape to protect against moisture.

• Caulk any visible gaps.

This step ensures long-term weatherproofing, especially in climates with heavy rain or snow.

📦 Step 7: Install AC Unit

1. Slide Amana unit into sleeve carefully.

2. Follow manufacturer’s mounting instructions.

3. Secure locking brackets.

4. Plug in power cord.

5. Test unit for level operation.

🧹 Step 8: Clean-Up and Final Inspection

• Check drainage slope.

• Confirm secure mounting.

• Inspect electrical connections.

• Verify cooling operation and remote functionality.

👷 When to Call a Pro

Consider professional installation if:

• Structural changes are required.

• Electrical upgrades are needed.

• You’re unsure about cutting exterior walls.

Licensed contractors provide permits, warranties, and code-compliant work ( HVAC Directory).

📝 Permits and Regulations

• Some municipalities require building permits for TTW installations.

• HOA or condo associations may have exterior appearance rules.

Check with your local Permit Office before starting work.

💰 Cost Comparison: DIY vs Professional

Task	DIY Estimate	Pro Install
Wall Sleeve	$150-$250	Included
Tools	$100-$300	Included
Labor	Free	$500-$1,200
Electrical Work	$0-$500	Included
Total Cost	$250-$1,000	$700-$1,500

🎯 Conclusion: DIY Is Possible, But Not Always Best

Installing a through-the-wall AC yourself can save money and provide satisfaction—if you have the right tools, skills, and confidence. For many homeowners, though, hiring a professional ensures the job is done safely, efficiently, and to code.

When properly installed, the Amana 11,600 BTU PBC122J00AA will provide years of efficient, quiet comfort.

In the next topic we will read about: Wall Sleeve Compatibility: What You Need to Know Before Buying the Amana PBC122J00AA