TTW

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Welcome to the South Mini Splits collection for Through The Wall (TTW). We feature high-efficiency systems from industry leaders like Cooper & Hunter, OLMO, MRCOOL, and Bravo.

These sturdy, standardized, and reliable units are the ideal solution for direct replacement in existing wall sleeves, efficient cooling/heating in hotels and motels, and new apartment construction where ductwork is not utilized.

💡Why Choose South Mini Splits for Your Through The Wall (TTW)?

✅ Wholesale Pricing: Competitive rates on top-tier HVAC equipment.

✅ USA-Based Support: Expert help from sizing to post-install troubleshooting.

✅ Free Shipping Over $300: Get your complete system delivered fast.

What are TTW (Through The Wall) AC Units?

A TTW air conditioner is a self-contained unit that slides into a pre-existing or custom-built sleeve installed directly through an exterior wall. Unlike window units, TTW units are more secure, offer a cleaner aesthetic, and are designed to be a permanent fixture in the building. Many TTW units come equipped with both cooling and heating capabilities (heat pumps or electric heat), providing year-round comfort.

TTW units are the perfect choice for applications requiring standardized, secure, and permanent climate control:

  • Hospitality (Hotels/Motels): Their ease of replacement and robust construction make them the standard choice for guest room climate control.
  • Apartment/Condo Complexes: They offer dedicated, tenant-controlled cooling and heating for individual units without shared ductwork.
  • New Construction: TTW units are often selected for additions or small commercial spaces where minimizing installation cost is a priority compared to full ductwork.
  • Direct Replacement: They are designed to fit standard wall sleeves, making the replacement of an aging unit a quick, straightforward process.

Compatibility and Sizing for TTW (Pro Insight)

TTW replacement often involves matching the new unit to the existing wall sleeve. This requires attention to detail to ensure a perfect fit and seal.

  • Sleeve Compatibility is Key: The most crucial factor is the dimensions of the wall sleeve. We recommend checking the case width and depth of your existing unit or sleeve to ensure the new TTW unit slides in securely for proper operation and energy efficiency. Standardized sizing (like the common 42" wide sleeve) makes this process easier.
  • BTU Matching: You must match the BTU capacity to the room size. As a general guideline, you need approximately 20-25 BTUs per square foot, but for commercial spaces, additional factors like sun exposure and occupancy must be considered.

Power Cord Location: Ensure the power cord location on the new unit is compatible with your wall outlet setup to avoid awkward installations or cord stretching.

Mini Split BTU Sizing & Application Guide

Use our quick reference chart to match your room size with the ideal system capacity.

Capacity Sq. Footage Application
6,000 BTU150–250Small bedrooms & offices
9,000 BTU250–450Standard bedrooms
12,000 BTU450–600Kitchens & studios
18,000 BTU600–1,000Living rooms & garages
24,000 BTU1,000–1,200Open floor plans
36,000 BTU1,500–1,700Commercial & fitness
48,000 BTU1,900–2,100Large warehouses
60,000 BTU2,400–2,800+Commercial estates

When to "Size Up"

High Ceilings (10ft+)

If your ceilings are 10 feet or higher, you are cooling a larger volume of air. We recommend increasing your BTU choice by 20%.

Poor Insulation

For older homes or buildings with single-pane windows, opt for the next size up to ensure the unit can maintain the set temperature.

Kitchen Environments

Appliances generate significant heat. If the unit is for a kitchen, add 4,000 BTUs to your square footage calculation.

Heavy Sun Exposure

Rooms with large south-facing windows or "sunrooms" act like greenhouses. Increase your BTU capacity by 10-15%

Occupancy

If the area regularly hosts more than two people (like a conference room or classroom), add 600 BTUs per additional person..

Need Help Sizing?

If you aren't sure which unit is right for your project, use our BTU Calculator or contact our USA-based support team for a custom recommendation.

Open BTU Calculator

FAQs/Frequently Asked Questions

Q: Can I replace my TTW AC with a standard window unit?

A: No. While they look similar, window units are designed to rest on a windowsill and vent outward, whereas TTW units are designed to slide into and be supported by a wall sleeve. Do not attempt to put a window unit into a TTW sleeve.

Q: Do TTW units require an electrician for installation?

A: Most TTW units operate on a standard 120V or 240V circuit. If the new unit's plug type or voltage does not match the existing wall receptacle, a licensed electrician will be required to change the outlet for safe and compliant operation.

Q: Is a TTW unit more efficient than a mini split?

A: Generally, no. Ductless mini splits use inverter technology and separate the components, which makes them highly efficient (high SEER ratings). TTW units are simpler, self-contained systems. While modern TTW units are much more efficient than older models, a mini split will usually offer superior energy savings.

Q: Do TTW units offer heating?

A: Yes. Most TTW models are available as either cool-only or as a Heat Pump (providing efficient heating down to certain temperatures) or with Electric Resistance Heat (a backup heat source common in colder climates). Always verify the heating type before purchase.

Q: How often should the filter be cleaned in a TTW unit?

A: Because TTW units are often used heavily in commercial settings (like hotels), the air filter should be checked and cleaned or replaced at least monthly, especially during peak cooling or heating seasons. A clean filter is vital for maintaining efficiency and indoor air quality.